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<channel>
    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
    </build-info>


<item>
            <title>[SERVER-26182] 3.2 node syncing from a 3.0 node can crash due to too-large BSON during upconversion to find command reply</title>
                <link>https://jira.mongodb.org/browse/SERVER-26182</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When a 3.2 replica set member is syncing from a 3.0 node, it downconverts find command requests to legacy OP_QUERY find requests and upconverts legacy OP_QUERY find replies to find command replies. This upconversion process can create a document that is larger than the 16 MB maximum, causing the secondary to trip a fatal assertion. See &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-26182?focusedCommentId=1391080&amp;amp;page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-1391080&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;comment below&lt;/a&gt; for more details.&lt;/p&gt;

&lt;p&gt;This issue should only affect users whose data files contain documents 12MB or larger.&lt;/p&gt;

&lt;p&gt;A backtrace such as the following should appear in the logs when this issue occurs:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2016-09-19T13:07:36.142+0000 I -        [NetworkInterfaceASIO-BGSync-0] Assertion: 10334:BSONObj size: 17130437 (0x10563C5) is invalid. Size must be between 0 and 16793600(16MB) First element: id: 99445122894&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2016-09-19T13:07:36.154+0000 I CONTROL  [NetworkInterfaceASIO-BGSync-0]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; 0x130c4a2 0x12a7248 0x128efe8 0x128f09c 0x973949 0xda2484 0x10abf65 0x10b75fb 0x10b929c 0x10b98a8 0x10b7040 0x108a750 0x10994ac 0x1099968 0x1329e71 0x132a091 0x132e22f 0x10aeda5 0x1b431c0 0x7f881c697b50 0x7f881c3e1fbd&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;----- BEGIN BACKTRACE -----&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{&quot;backtrace&quot;:[{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;F0C4A2&quot;,&quot;s&quot;:&quot;_ZN5mongo15printStackTraceERSo&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;EA7248&quot;,&quot;s&quot;:&quot;_ZN5mongo10logContextEPKc&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;E8EFE8&quot;,&quot;s&quot;:&quot;_ZN5mongo11msgassertedEiPKc&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;E8F09C&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;573949&quot;,&quot;s&quot;:&quot;_ZNK5mongo7BSONObj14_assertInvalidEv&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;9A2484&quot;,&quot;s&quot;:&quot;_ZN5mongo27appendGetMoreResponseObjectExNS_10StringDataENS_9BSONArrayEPNS_14BSONObjBuilderE&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;CABF65&quot;,&quot;s&quot;:&quot;_ZN5mongo8executor30upconvertLegacyGetMoreResponseEjNS_10StringDataERKNS_7MessageE&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;CB75FB&quot;,&quot;s&quot;:&quot;_ZN5mongo8executor20NetworkInterfaceASIO12AsyncCommand8responseENS_3rpc8ProtocolENS_6Date_tEPNS3_18EgressMetadataHookE&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;CB929C&quot;,&quot;s&quot;:&quot;_ZN5mongo8executor20NetworkInterfaceASIO20_completedOpCallbackEPNS1_7AsyncOpE&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;CB98A8&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;CB7040&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;C8A750&quot;,&quot;s&quot;:&quot;_ZN4asio6detail14strand_service8dispatchINS0_7binder2IRSt8functionIFvSt10error_codemEES5_mEEEEvRPNS1_11strand_implERT_&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;C994AC&quot;,&quot;s&quot;:&quot;_ZN4asio6detail14strand_service8dispatchINS0_17rewrapped_handlerINS0_7binder2INS0_7read_opINS_19basic_stream_socketINS_2ip3tcpENS_21stream_socket_serviceIS8_EEEENS_17mutable_buffers_1ENS0_14transfer_all_tENS0_15wrapped_handlerINS_10io_service6strandESt8functionIFvSt10error_codemEENS0_26is_continuation_if_runningEEEEESI_mEESK_EEEEvRPNS1_11strand_implERT_&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;C99968&quot;,&quot;s&quot;:&quot;_ZN4asio6detail23reactive_socket_recv_opINS_17mutable_buffers_1ENS0_7read_opINS_19basic_stream_socketINS_2ip3tcpENS_21stream_socket_serviceIS6_EEEES2_NS0_14transfer_all_tENS0_15wrapped_handlerINS_10io_service6strandESt8functionIFvSt10error_codemEENS0_26is_continuation_if_runningEEEEEE11do_completeEPvPNS0_19scheduler_operationERKSF_m&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;F29E71&quot;,&quot;s&quot;:&quot;_ZN4asio6detail9scheduler10do_run_oneERNS0_11scoped_lockINS0_11posix_mutexEEERNS0_21scheduler_thread_infoERKSt10error_code&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;F2A091&quot;,&quot;s&quot;:&quot;_ZN4asio6detail9scheduler3runERSt10error_code&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;F2E22F&quot;,&quot;s&quot;:&quot;_ZN4asio10io_service3runEv&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;CAEDA5&quot;},{&quot;b&quot;:&quot;400000&quot;,&quot;o&quot;:&quot;17431C0&quot;,&quot;s&quot;:&quot;execute_native_thread_routine&quot;},{&quot;b&quot;:&quot;7F881C691000&quot;,&quot;o&quot;:&quot;6B50&quot;},{&quot;b&quot;:&quot;7F881C304000&quot;,&quot;o&quot;:&quot;DDFBD&quot;,&quot;s&quot;:&quot;clone&quot;}],&quot;processInfo&quot;:{ &quot;mongodbVersion&quot; : &quot;3.2.9&quot;, &quot;gitVersion&quot; : &quot;22ec9e93b40c85fc7cae7d56e7d6a02fd811088c&quot;, &quot;compiledModules&quot; : [], &quot;uname&quot; : { &quot;sysname&quot; : &quot;Linux&quot;, &quot;release&quot; : &quot;3.2.0-4-amd64&quot;, &quot;version&quot; : &quot;#1 SMP Debian 3.2.73-2+deb7u2&quot;, &quot;machine&quot; : &quot;x86_64&quot; }, &quot;somap&quot; : [ { &quot;elfType&quot; : 2, &quot;b&quot; : &quot;400000&quot;, &quot;buildId&quot; : &quot;9A35851B156CCAF69D719418740E962817B11EA7&quot; }, { &quot;b&quot; : &quot;7FFCBB8BF000&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;000E93FBF194E9B9370E69572D55070F81BD1815&quot; }, { &quot;b&quot; : &quot;7F881D54A000&quot;, &quot;path&quot; : &quot;/usr/lib/x86_64-linux-gnu/libssl.so.1.0.0&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;16DA62C831D8080E3BCB9A1E7738D399EA3A89C0&quot; }, { &quot;b&quot; : &quot;7F881D151000&quot;, &quot;path&quot; : &quot;/usr/lib/x86_64-linux-gnu/libcrypto.so.1.0.0&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;079D784F9F4A88B6D87FC3E6B0B07BFBE209540E&quot; }, { &quot;b&quot; : &quot;7F881CF49000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/librt.so.1&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;07CC333722DC4237B5F88E47A38C214FDA0B9B59&quot; }, { &quot;b&quot; : &quot;7F881CD45000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/libdl.so.2&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;028546D6F23D0FD259928FED6EFE53E64782EF2D&quot; }, { &quot;b&quot; : &quot;7F881CAC3000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/libm.so.6&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;2C5446FA41E784A1C6FDD528AB2BCC7BCA9EF06C&quot; }, { &quot;b&quot; : &quot;7F881C8AD000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/libgcc_s.so.1&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;F980B1188708F8D8B5C35D185444AF4CB939AA1E&quot; }, { &quot;b&quot; : &quot;7F881C691000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/libpthread.so.0&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;3F3BFFEDAF77C955862785C6CBA7670F82A05563&quot; }, { &quot;b&quot; : &quot;7F881C304000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/libc.so.6&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;50B9FD83D874F18E3B385E0349FBD5D1281A19E3&quot; }, { &quot;b&quot; : &quot;7F881D7A9000&quot;, &quot;path&quot; : &quot;/lib64/ld-linux-x86-64.so.2&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;37BC6FC6FF3FA04B0A3EC20DFF215AB55EA5F5CB&quot; }, { &quot;b&quot; : &quot;7F881C0ED000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/libz.so.1&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;1EFEB71FD4999C2307570D673A724EA4E1D85267&quot; } ] }}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; mongod(_ZN5mongo15printStackTraceERSo+0x32) [0x130c4a2]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; mongod(_ZN5mongo10logContextEPKc+0x138) [0x12a7248]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; mongod(_ZN5mongo11msgassertedEiPKc+0x88) [0x128efe8]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; mongod(+0xE8F09C) [0x128f09c]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; mongod(_ZNK5mongo7BSONObj14_assertInvalidEv+0x3B9) [0x973949]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; mongod(_ZN5mongo27appendGetMoreResponseObjectExNS_10StringDataENS_9BSONArrayEPNS_14BSONObjBuilderE+0x514) [0xda2484]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; mongod(_ZN5mongo8executor30upconvertLegacyGetMoreResponseEjNS_10StringDataERKNS_7MessageE+0x145) [0x10abf65]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; mongod(_ZN5mongo8executor20NetworkInterfaceASIO12AsyncCommand8responseENS_3rpc8ProtocolENS_6Date_tEPNS3_18EgressMetadataHookE+0x18B) [0x10b75fb]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; mongod(_ZN5mongo8executor20NetworkInterfaceASIO20_completedOpCallbackEPNS1_7AsyncOpE+0x5C) [0x10b929c]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; mongod(+0xCB98A8) [0x10b98a8]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; mongod(+0xCB7040) [0x10b7040]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; mongod(_ZN4asio6detail14strand_service8dispatchINS0_7binder2IRSt8functionIFvSt10error_codemEES5_mEEEEvRPNS1_11strand_implERT_+0x70) [0x108a750]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; mongod(_ZN4asio6detail14strand_service8dispatchINS0_17rewrapped_handlerINS0_7binder2INS0_7read_opINS_19basic_stream_socketINS_2ip3tcpENS_21stream_socket_serviceIS8_EEEENS_17mutable_buffers_1ENS0_14transfer_all_tENS0_15wrapped_handlerINS_10io_service6strandESt8functionIFvSt10error_codemEENS0_26is_continuation_if_runningEEEEESI_mEESK_EEEEvRPNS1_11strand_implERT_+0x89C) [0x10994ac]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; mongod(_ZN4asio6detail23reactive_socket_recv_opINS_17mutable_buffers_1ENS0_7read_opINS_19basic_stream_socketINS_2ip3tcpENS_21stream_socket_serviceIS6_EEEES2_NS0_14transfer_all_tENS0_15wrapped_handlerINS_10io_service6strandESt8functionIFvSt10error_codemEENS0_26is_continuation_if_runningEEEEEE11do_completeEPvPNS0_19scheduler_operationERKSF_m+0x228) [0x1099968]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; mongod(_ZN4asio6detail9scheduler10do_run_oneERNS0_11scoped_lockINS0_11posix_mutexEEERNS0_21scheduler_thread_infoERKSt10error_code+0x2F1) [0x1329e71]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; mongod(_ZN4asio6detail9scheduler3runERSt10error_code+0xC1) [0x132a091]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; mongod(_ZN4asio10io_service3runEv+0x2F) [0x132e22f]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; mongod(+0xCAEDA5) [0x10aeda5]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; mongod(execute_native_thread_routine+0x20) [0x1b431c0]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; libpthread.so.0(+0x6B50) [0x7f881c697b50]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; libc.so.6(clone+0x6D) [0x7f881c3e1fbd]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;-----  END BACKTRACE  -----&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;h5&gt;&lt;a name=&quot;Originaldescription&quot;&gt;&lt;/a&gt;Original description&lt;/h5&gt;

&lt;p&gt;We&apos;ve recently started upgrading our Mongo replica sets to 3.2,&lt;br/&gt;
We have one replica set for which it doesn&apos;t apply as swiftly as the others though,&lt;br/&gt;
When trying upon its first secondary node, starting it up after binaries were switched to 3.2 appears to first successfully mark it as part of its configured replica set and set it to a SECONDARY state, but immediately after change its state to a STANDALONE instance while the enclosed errors are printed on the instance log:&lt;/p&gt;

&lt;p&gt;2016-09-19T13:07:35.977+0000 I NETWORK  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; connection accepted from 10.14.0.51:45381 #140 (136 connections now open)&lt;br/&gt;
2016-09-19T13:07:36.142+0000 I -        &lt;span class=&quot;error&quot;&gt;&amp;#91;NetworkInterfaceASIO-BGSync-0&amp;#93;&lt;/span&gt; Assertion: 10334:BSONObj size: 17130437 (0x10563C5) is invalid. Size must be between 0 and 16793600(16MB) First element: id: 99445122894&lt;/p&gt;

&lt;p&gt;This appears to have to do with a specific collection that at least one document that is bigger than 16MB, thing is we&apos;ve issued db.upgradeCheckAllDBs() prior to the upgrade for this member and it completed perfectly fine.&lt;/p&gt;

&lt;p&gt;How can we spot the root cause for this and eliminate it please so we can move on with the 3.2 upgrade for this replica set as well as all of our other replica sets?&lt;/p&gt;

&lt;p&gt;Many thanks,&lt;br/&gt;
Avraham Kalvo, DBA&lt;/p&gt;</description>
                <environment></environment>
        <key id="317397">SERVER-26182</key>
            <summary>3.2 node syncing from a 3.0 node can crash due to too-large BSON during upconversion to find command reply</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="charlie.swanson@mongodb.com">Charlie Swanson</assignee>
                                    <reporter username="avrahamk">Avraham Kalvo</reporter>
                        <labels>
                            <label>code-and-test</label>
                    </labels>
                <created>Tue, 20 Sep 2016 07:05:10 +0000</created>
                <updated>Sat, 11 Feb 2017 00:16:36 +0000</updated>
                            <resolved>Tue, 8 Nov 2016 15:18:04 +0000</resolved>
                                                    <fixVersion>3.2.11</fixVersion>
                                    <component>Querying</component>
                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>10</watches>
                                                                                                                <comments>
                            <comment id="1435209" author="xgen-internal-githook" created="Wed, 16 Nov 2016 02:38:36 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;cswanson310&apos;, u&apos;name&apos;: u&apos;Charlie Swanson&apos;, u&apos;email&apos;: u&apos;charlie.swanson@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-26182&quot; title=&quot;3.2 node syncing from a 3.0 node can crash due to too-large BSON during upconversion to find command reply&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-26182&quot;&gt;&lt;del&gt;SERVER-26182&lt;/del&gt;&lt;/a&gt; Reserve error code in use on 3.2 branch&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/54b9623f698d00ebc89a031cd4a61e49d1041300&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/54b9623f698d00ebc89a031cd4a61e49d1041300&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1429222" author="xgen-internal-githook" created="Tue, 8 Nov 2016 15:17:15 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;cswanson310&apos;, u&apos;name&apos;: u&apos;Charlie Swanson&apos;, u&apos;email&apos;: u&apos;charlie.swanson@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-26182&quot; title=&quot;3.2 node syncing from a 3.0 node can crash due to too-large BSON during upconversion to find command reply&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-26182&quot;&gt;&lt;del&gt;SERVER-26182&lt;/del&gt;&lt;/a&gt; Avoid putting OP_REPLY batches &amp;gt;16MB into a single BSONObj&lt;br/&gt;
Branch: v3.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/524cc9989bcf743b34bcc9e9d05d9f72cae48620&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/524cc9989bcf743b34bcc9e9d05d9f72cae48620&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1403714" author="avrahamk" created="Sun, 9 Oct 2016 07:08:33 +0000"  >&lt;p&gt;Many thanks,&lt;br/&gt;
You may know close this ticket.&lt;/p&gt;</comment>
                            <comment id="1393389" author="david.storch" created="Mon, 26 Sep 2016 14:21:05 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=avrahamk&quot; class=&quot;user-hover&quot; rel=&quot;avrahamk&quot;&gt;avrahamk&lt;/a&gt;, a mixed 3.0.12 / 3.2 cluster should be affected by this issue as well. Without further information, my best guess is that you simply happened not to hit the issue. This requires a particular sequence of variously sized BSON objects to be returned in a query response, which is why the issue does not affect many 3.0 =&amp;gt; 3.2 rolling upgrades.&lt;/p&gt;</comment>
                            <comment id="1393004" author="avrahamk" created="Sun, 25 Sep 2016 11:37:27 +0000"  >&lt;p&gt;Thanks a lot David, Thomas, for that elaborated response.&lt;/p&gt;

&lt;p&gt;I couldn&apos;t find where to add a comment on the ticket,&lt;br/&gt;
Just wanted to ask, how come when upgrading from 3.0.12 it upgrades with no&lt;br/&gt;
issues?&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Avi K&lt;/p&gt;

&lt;p&gt;On Sat, Sep 24, 2016 at 1:17 AM, David Storch (JIRA) &amp;lt;jira@mongodb.org&amp;gt;&lt;/p&gt;
</comment>
                            <comment id="1392221" author="david.storch" created="Fri, 23 Sep 2016 18:08:12 +0000"  >&lt;p&gt;I&apos;ve reproduced the reported stack trace with the following script:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;(function() {&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    // Create a replica set with one &quot;3.0&quot; node and one &quot;3.2&quot; node.&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    var replSetName = &quot;testset&quot;;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    var nodes = [&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;        {binVersion: &quot;3.0&quot;},&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;        {binVersion: &quot;3.2&quot;},&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    ];&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    var rst = ReplSetTest({name: replSetName, nodes: nodes});&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    rst.startSet();&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    // Rig the election so that the 3.0 node becomes primary.&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    var replSetConfig = rst.getReplSetConfig();&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    replSetConfig.members[1].priority = 0;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    rst.initiate(replSetConfig);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    var primaryDB = rst.getPrimary().getDB(&quot;test&quot;);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    primaryDB.c.drop();&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    // Create a document between 3 and 4 megabytes and another document between 15 and 16 MB.&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    var str1mb = &apos;,&apos;;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    while (str1mb.length &amp;lt; (1024 * 1024)) {&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;        str1mb += str1mb&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    var docSmall = {a: str1mb, b: str1mb, c: str1mb};&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    assert.gte(Object.bsonsize(docSmall), 3 * 1024 * 1024);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    assert.lte(Object.bsonsize(docSmall), 4 * 1024 * 1024);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    var str15mb = &apos;&apos;;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    for (var i = 0; i &amp;lt; 15; i++) {&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;        str15mb += str1mb;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    var docLarge = {a: str15mb};&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    assert.gte(Object.bsonsize(docLarge), 15 * 1024 * 1024);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    assert.lte(Object.bsonsize(docLarge), 16 * 1024 * 1024);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    // First document should exceed the 1MB limit of the initial find.&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    assert.writeOK(primaryDB.c.insert(docSmall));&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    // The first getMore batch should contain both the ~3 MB and the ~15 MB document, leading to&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    // more than 16 MB of user data in the batch.&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    assert.writeOK(primaryDB.c.insert(docSmall));&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    assert.writeOK(primaryDB.c.insert(docLarge));&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    rst.awaitReplication();&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    rst.stopSet();&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;})();&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;Moving this ticket into &quot;Needs Triage&quot; so that it will be evaluated by the query team.&lt;/p&gt;</comment>
                            <comment id="1391080" author="david.storch" created="Thu, 22 Sep 2016 17:41:09 +0000"  >&lt;p&gt;I reviewed this with &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=anonymous.user&quot; class=&quot;user-hover&quot; rel=&quot;anonymous.user&quot;&gt;anonymous.user&lt;/a&gt;, and we came up with a hypothesis of what we think is happening. Thomas will develop a repro script to confirm.&lt;/p&gt;

&lt;p&gt;In 3.2, we introduced a new protocol for performing queries called find command. The syntax for the find command is documented here: &lt;a href=&quot;https://docs.mongodb.com/manual/reference/command/find/#dbcmd.find&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.com/manual/reference/command/find/#dbcmd.find&lt;/a&gt;. This replaces an older protocol typically referred to as OP_QUERY legacy find. When a version 3.2 member of a replica set syncs from another 3.2, it uses the new find command protocol for fetching oplog entries from the sync source. If the sync source is 3.0, however, then it must use legacy OP_QUERY find for compatibility. In order to deal with this, the replication system downconverts find command requests to OP_QUERY find and then upconverts OP_QUERY find replies to find command replies. The upconversion happens here:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.2.9/src/mongo/executor/downconvert_find_and_getmore_commands.cpp#L207-L229&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/r3.2.9/src/mongo/executor/downconvert_find_and_getmore_commands.cpp#L207-L229&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Not all OP_QUERY find replies, however, can be represented as find command replies! The find command reply format allows for at most 16MB of user data. The OP_QUERY reply format, however, can theoretically contain 20MB of user data. This rarely happens in practice, however, since the batching rules in 3.0 are to stop adding documents when the size of the reply buffer exceeds 4MB. But imagine the following problematic scenario:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;The first result document is just under 4MB, which is added to the OP_QUERY reply buffer.&lt;/li&gt;
	&lt;li&gt;The query system proceeds to fetch another document, since the 4MB threshold has not yet been crossed.&lt;/li&gt;
	&lt;li&gt;The next document is just under 16MB, the maximum document size, and is added to the reply buffer.&lt;/li&gt;
	&lt;li&gt;Now the response has 20MB of user data, which cannot be represented as a find command reply!&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;The find command itself is not affected by a similar problem; when it retrieves a document from the query system that will put the batch size over 16MB, it queues the document for later and returns the batch without it. One possible fix, assuming that we have correctly identified the problem, would be to backport code to 3.0 that adds similar behavior to the legacy OP_QUERY find path. Another approach would be to put a fix into the 3.2 branch to make the replication upconversion avoid creating a too-large document.&lt;/p&gt;</comment>
                            <comment id="1390349" author="thomas.schubert" created="Wed, 21 Sep 2016 21:18:49 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=avrahamk&quot; class=&quot;user-hover&quot; rel=&quot;avrahamk&quot;&gt;avrahamk&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thanks for reporting this issue. We are investigating it and will update you when we know more.&lt;/p&gt;

&lt;p&gt;Kind regards,&lt;br/&gt;
Thomas&lt;/p&gt;</comment>
                            <comment id="1389669" author="avrahamk" created="Wed, 21 Sep 2016 12:47:29 +0000"  >&lt;p&gt;We are discussing upgrade to version 3.2.9 from probably version 3.0.9 (we didn&apos;t notice its exact minor version before having setup the 3.2.9 binaries)&lt;br/&gt;
We don&apos;t have it upgrading from 3.0.12 for another member in the same replica set.&lt;/p&gt;

&lt;p&gt;This happens over Debian GNU/Linux 7&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Avi K&lt;/p&gt;</comment>
                    </comments>
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