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    <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-21119] Better behavior for shell with readMode &quot;commands&quot; and find() when switching to an older server</title>
                <link>https://jira.mongodb.org/browse/SERVER-21119</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If someone is downgrading, they could easily hit this scenario.&lt;/p&gt;

&lt;p&gt;In addition to the error in the shell, there&apos;s also a scary looking stack trace in the logs when you run this for the first time&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;
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					&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;2015-10-26T12:48:36.827+1100 I QUERY    [conn9]     operation isn&apos;t supported: 2008&lt;/span&gt;&lt;/pre&gt;
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					&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;2015-10-26T12:48:36.827+1100 I -        [conn9] Assertion: 16141:cannot translate opcode 2008&lt;/span&gt;&lt;/pre&gt;
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						&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;2015-10-26T12:48:36.831+1100 I CONTROL  [conn9]&lt;/span&gt;&lt;/pre&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
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					&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; 0x1050f9449 0x1050ab600 0x1050997da 0x10509969a 0x104aad47a 0x104aa9fd4 0x104c43980 0x104984e3e 0x1050bb39c 0x10512c4f1 0x7fff8e06005a 0x7fff8e05ffd7 0x7fff8e05d3ed&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;
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					&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;104979000&quot;,&quot;o&quot;:&quot;780449&quot;},{&quot;b&quot;:&quot;104979000&quot;,&quot;o&quot;:&quot;732600&quot;},{&quot;b&quot;:&quot;104979000&quot;,&quot;o&quot;:&quot;7207DA&quot;},{&quot;b&quot;:&quot;104979000&quot;,&quot;o&quot;:&quot;72069A&quot;},{&quot;b&quot;:&quot;104979000&quot;,&quot;o&quot;:&quot;13447A&quot;},{&quot;b&quot;:&quot;104979000&quot;,&quot;o&quot;:&quot;130FD4&quot;},{&quot;b&quot;:&quot;104979000&quot;,&quot;o&quot;:&quot;2CA980&quot;},{&quot;b&quot;:&quot;104979000&quot;,&quot;o&quot;:&quot;BE3E&quot;},{&quot;b&quot;:&quot;104979000&quot;,&quot;o&quot;:&quot;74239C&quot;},{&quot;b&quot;:&quot;104979000&quot;,&quot;o&quot;:&quot;7B34F1&quot;},{&quot;b&quot;:&quot;7FFF8E05C000&quot;,&quot;o&quot;:&quot;405A&quot;},{&quot;b&quot;:&quot;7FFF8E05C000&quot;,&quot;o&quot;:&quot;3FD7&quot;},{&quot;b&quot;:&quot;7FFF8E05C000&quot;,&quot;o&quot;:&quot;13ED&quot;}],&quot;processInfo&quot;:{ &quot;mongodbVersion&quot; : &quot;3.0.7&quot;, &quot;gitVersion&quot; : &quot;6ce7cbe8c6b899552dadd907604559806aa2e9bd&quot;, &quot;uname&quot; : { &quot;sysname&quot; : &quot;Darwin&quot;, &quot;release&quot; : &quot;14.5.0&quot;, &quot;version&quot; : &quot;Darwin Kernel Version 14.5.0: Wed Jul 29 02:26:53 PDT 2015; root:xnu-2782.40.9~1/RELEASE_X86_64&quot;, &quot;machine&quot; : &quot;x86_64&quot; }, &quot;somap&quot; : [ { &quot;path&quot; : &quot;/usr/local/bin/mongod&quot;, &quot;machType&quot; : 2, &quot;b&quot; : &quot;104979000&quot;, &quot;buildId&quot; : &quot;C7961951A8C135B2B56385D289485317&quot; }, { &quot;path&quot; : &quot;/usr/lib/libSystem.B.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF8D24D000&quot;, &quot;buildId&quot; : &quot;1866C519C5F33D098C17A8F703664521&quot; }, { &quot;path&quot; : &quot;/usr/lib/libc++.1.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF9236E000&quot;, &quot;buildId&quot; : &quot;1B9530FD989B3174BB1CBDC159501710&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libcache.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF8FBCA000&quot;, &quot;buildId&quot; : &quot;45E9A2E799C436B2BEE30C4E11614AD1&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libcommonCrypto.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF93E49000&quot;, &quot;buildId&quot; : &quot;E789748DF9A73CFFB31790DF348B1E95&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libcompiler_rt.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF89B6B000&quot;, &quot;buildId&quot; : &quot;BF8FC133EE103DA69B9092039E28678F&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libcopyfile.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF897EA000&quot;, &quot;buildId&quot; : &quot;0C68D3A6ACDD3EF3991ACC82C32AB836&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libcorecrypto.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF93F4F000&quot;, &quot;buildId&quot; : &quot;5779FFA04D9A3AD4B7F2618227621DC8&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libdispatch.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF8E284000&quot;, &quot;buildId&quot; : &quot;502CF32B669B3709886208188225E4F0&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libdyld.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF8FC96000&quot;, &quot;buildId&quot; : &quot;CFBBE540D5033AFCB5D6644F1E69949B&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libkeymgr.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF8EFF1000&quot;, &quot;buildId&quot; : &quot;77845842DE703CC5BD01C3D14227CED5&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/liblaunch.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF8E1BA000&quot;, &quot;buildId&quot; : &quot;4F81CA3AD2CE3030A89D42F3DAD7BA8F&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libmacho.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF8C788000&quot;, &quot;buildId&quot; : &quot;126CA2EDDE91308F8881B9DAEC3C63B6&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libquarantine.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF93E79000&quot;, &quot;buildId&quot; : &quot;7AF900412768378A925AD83161863642&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libremovefile.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF95A34000&quot;, &quot;buildId&quot; : &quot;3485B5F46CE83C628DFD8736ED6E8531&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libsystem_asl.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF95A1D000&quot;, &quot;buildId&quot; : &quot;F153AC5B0542356E88C820A62CA704E2&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libsystem_blocks.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF8D090000&quot;, &quot;buildId&quot; : &quot;9615D10AFCA73BE4AA1A1B195DACE1A1&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libsystem_c.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF8AA40000&quot;, &quot;buildId&quot; : &quot;F0635E0FFE4B34DBACF9A58C1E9070E9&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libsystem_configuration.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF941AC000&quot;, &quot;buildId&quot; : &quot;56F94DCEDBDE36158F07DE6270D9F8BE&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libsystem_coreservices.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF8FBFB000&quot;, &quot;buildId&quot; : &quot;41B7C5785A5331C8A96FC73E030B0938&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libsystem_coretls.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF90DAB000&quot;, &quot;buildId&quot; : &quot;155DA0A92046332EBFA3D7974A51F731&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libsystem_dnssd.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF94038000&quot;, &quot;buildId&quot; : &quot;0CEB5910843F315CA1DE5D955A48A045&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libsystem_info.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF898D0000&quot;, &quot;buildId&quot; : &quot;2E16C4B3A32739579C41143911979A1E&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libsystem_kernel.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF8CE55000&quot;, &quot;buildId&quot; : &quot;16AD15EF3DAE3F639D2626CCE1920762&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libsystem_m.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF94041000&quot;, &quot;buildId&quot; : &quot;1E12AB456D9636D0A226F24D9FB0D9D6&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libsystem_malloc.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF8E9F3000&quot;, &quot;buildId&quot; : &quot;DDA8928BCC0D3255BD8A3FEA0982B890&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libsystem_network.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF8FE22000&quot;, &quot;buildId&quot; : &quot;6105C13467223C0AA4CE5E1261E2E1CC&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libsystem_networkextension.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF95D2D000&quot;, &quot;buildId&quot; : &quot;BA58B30B83773B0A8AE34F84021D9D4E&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libsystem_notify.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF8BD99000&quot;, &quot;buildId&quot; : &quot;61147800F3203DAA850CBADF33855F29&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libsystem_platform.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF91308000&quot;, &quot;buildId&quot; : &quot;64E34079D7123D669CE2418624A5C040&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libsystem_pthread.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF8E05C000&quot;, &quot;buildId&quot; : &quot;ACE90967ECD03251AEEB461E3C6414F7&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libsystem_sandbox.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF96AA9000&quot;, &quot;buildId&quot; : &quot;3F5E973FC70231AC97BC05F5C195683C&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libsystem_secinit.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF923E0000&quot;, &quot;buildId&quot; : &quot;581DAD0F6B633A48B63B917AF799ABAA&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libsystem_stats.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF94032000&quot;, &quot;buildId&quot; : &quot;D0E968373CF6323DB7116DF6F660E530&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libsystem_trace.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF91690000&quot;, &quot;buildId&quot; : &quot;840F5301B55A307890B9FEFFD6CD741A&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libunc.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF93224000&quot;, &quot;buildId&quot; : &quot;5676F7EAC1DF329FB006D2C3022B7D70&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libunwind.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF8CEB4000&quot;, &quot;buildId&quot; : &quot;BE7E51A0B6EA3A549CCA9D88F683A6D6&quot; }, { &quot;path&quot; : &quot;/usr/lib/system/libxpc.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF94D63000&quot;, &quot;buildId&quot; : &quot;5C829202962E37448B5000D38CC88E84&quot; }, { &quot;path&quot; : &quot;/usr/lib/libobjc.A.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF936C8000&quot;, &quot;buildId&quot; : &quot;759E155DBC423D4E869B6F57D477177C&quot; }, { &quot;path&quot; : &quot;/usr/lib/libauto.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF90DBD000&quot;, &quot;buildId&quot; : &quot;A260789BD4D8316A9490254767B8A5F1&quot; }, { &quot;path&quot; : &quot;/usr/lib/libc++abi.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF8D00B000&quot;, &quot;buildId&quot; : &quot;88A22A0F87C63002BFBAAC0F2808B8B9&quot; }, { &quot;path&quot; : &quot;/usr/lib/libDiagnosticMessagesClient.dylib&quot;, &quot;machType&quot; : 6, &quot;b&quot; : &quot;7FFF8CB58000&quot;, &quot;buildId&quot; : &quot;2EE8E4365CDC34C599595BA218D507FB&quot; } ] }}&lt;/span&gt;&lt;/pre&gt;
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					&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(_ZN5mongo15printStackTraceERNSt3__113basic_ostreamIcNS0_11char_traitsIcEEEE+0x39) [0x1050f9449]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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						&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+0x100) [0x1050ab600]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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					&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+0x13A) [0x1050997da]&lt;/span&gt;&lt;/pre&gt;
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					&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(_ZN5mongo11msgassertedEiRKNSt3__112basic_stringIcNS0_11char_traitsIcEENS0_9allocatorIcEEEE+0x1A) [0x10509969a]&lt;/span&gt;&lt;/pre&gt;
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					&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(_ZN5mongo10opToStringEi+0x18A) [0x104aad47a]&lt;/span&gt;&lt;/pre&gt;
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					&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(_ZNK5mongo7OpDebug6reportERKNS_5CurOpERKNS_9LockStatsIxEE+0xB4) [0x104aa9fd4]&lt;/span&gt;&lt;/pre&gt;
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				&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(_ZN5mongo16assembleResponseEPNS_16OperationContextERNS_7MessageERNS_10DbResponseERKNS_11HostAndPortE+0xD20) [0x104c43980]&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(_ZN5mongo16MyMessageHandler7processERNS_7MessageEPNS_21AbstractMessagingPortEPNS_9LastErrorE+0xDE) [0x104984e3e]&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(_ZN5mongo17PortMessageServer17handleIncomingMsgEPv+0x33C) [0x1050bb39c]&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(_ZN5boost12_GLOBAL__N_112thread_proxyEPv+0xB1) [0x10512c4f1]&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; libsystem_pthread.dylib(_pthread_body+0x83) [0x7fff8e06005a]&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; libsystem_pthread.dylib(_pthread_body+0x0) [0x7fff8e05ffd7]&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; libsystem_pthread.dylib(thread_start+0xD) [0x7fff8e05d3ed]&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;-----  END 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;   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;2015-10-26T12:48:36.831+1100 I NETWORK  [conn9] AssertionException handling request, closing client connection: 16141 cannot translate opcode 2008&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;Subsequent find() commands give the same message in the shell, but don&apos;t generate another stack trace&lt;/p&gt;


&lt;p&gt;&lt;b&gt;Workarounds&lt;/b&gt;&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;Restart the shell. I think even restarting with a 3.2.0-rc0 shell works, as the shell will determine it needs be be in &quot;legacy&quot; mode&lt;/li&gt;
	&lt;li&gt;Manually set the readMode
&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;   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;db.getMongo().forceReadMode(&quot;legacy&quot;)&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;or&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;   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;db.getMongo().forceReadMode(&quot;compatibility&quot;)&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;/li&gt;
&lt;/ol&gt;


&lt;p&gt;It would be nice if the shell could figure this out for itself.&lt;/p&gt;</description>
                <environment></environment>
        <key id="236063">SERVER-21119</key>
            <summary>Better behavior for shell with readMode &quot;commands&quot; and find() when switching to an older server</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="jonathan.reams@mongodb.com">Jonathan Reams</assignee>
                                    <reporter username="joanna.cheng@mongodb.com">Joanna Cheng</reporter>
                        <labels>
                    </labels>
                <created>Mon, 26 Oct 2015 01:56:32 +0000</created>
                <updated>Mon, 1 Feb 2016 19:53:35 +0000</updated>
                            <resolved>Mon, 1 Feb 2016 19:49:41 +0000</resolved>
                                                                    <component>Querying</component>
                    <component>Shell</component>
                                        <votes>0</votes>
                                    <watches>13</watches>
                                                                                                                <comments>
                            <comment id="1160047" author="jonathan.reams@10gen.com" created="Mon, 1 Feb 2016 19:49:41 +0000"  >&lt;p&gt;Since this relates to compatibility between RC&apos;s that have already gone GA, and because it doesn&apos;t actually cause a failure, just a warning message in the logs - I&apos;m closing this.&lt;/p&gt;</comment>
                            <comment id="1089255" author="jonathan.abrahams" created="Mon, 16 Nov 2015 15:45:51 +0000"  >&lt;p&gt;mongo RC-2/mongod RC-3 compatibility issue uncovered belongs in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-20884&quot; title=&quot;ReplyBuilderInterface should have a way to expose the builder&amp;#39;s buffer to Command::run()&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-20884&quot;&gt;&lt;del&gt;SERVER-20884&lt;/del&gt;&lt;/a&gt;, and the details have been documented there.&lt;/p&gt;</comment>
                            <comment id="1089208" author="david.storch" created="Mon, 16 Nov 2015 15:23:52 +0000"  >&lt;p&gt;Got it. We made a performance enhancement under &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-20884&quot; title=&quot;ReplyBuilderInterface should have a way to expose the builder&amp;#39;s buffer to Command::run()&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-20884&quot;&gt;&lt;del&gt;SERVER-20884&lt;/del&gt;&lt;/a&gt; which breaks compatibility between 3.2.0-rc3 and previous 3.2.0 release candidates. You shouldn&apos;t be able to reproduce this problem unless the shell and server versions span &lt;a href=&quot;https://github.com/mongodb/mongo/commit/289d3fdf5c9d5b232b383c6cd871de1b75cf76b4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;289d3fdf5c9d5&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="1089196" author="jonathan.abrahams" created="Mon, 16 Nov 2015 15:17:34 +0000"  >&lt;p&gt;Steps performed on OSX:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;wget &lt;a href=&quot;https://fastdl.mongodb.org/osx/mongodb-osx-x86_64-latest.tgz&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://fastdl.mongodb.org/osx/mongodb-osx-x86_64-latest.tgz&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;tar -xzf mongodb-osx-x86_64-latest.tgz&lt;/li&gt;
	&lt;li&gt;mongodb-osx-x86_64-3.2.0-rc2-206-g7790034/bin/mongod --dbpath /tmp --port 34567&lt;/li&gt;
	&lt;li&gt;wget &lt;a href=&quot;https://fastdl.mongodb.org/osx/mongodb-osx-x86_64-3.2.0-rc2.tgz&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://fastdl.mongodb.org/osx/mongodb-osx-x86_64-3.2.0-rc2.tgz&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;tar -xzf mongodb-osx-x86_64-3.2.0-rc2.tgz&lt;/li&gt;
	&lt;li&gt;mongodb-osx-x86_64-3.2.0-rc2/bin/mongo --port 34567&lt;/li&gt;
&lt;/ol&gt;
</comment>
                            <comment id="1089167" author="david.storch" created="Mon, 16 Nov 2015 15:03:58 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jonathan.abrahams&quot; class=&quot;user-hover&quot; rel=&quot;jonathan.abrahams&quot;&gt;jonathan.abrahams&lt;/a&gt;, can you provide repro details for the behavior you report? I just did the following&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Issue a query from a 3.2.0-rc2 shell to a 3.2.0-rc2 server.&lt;/li&gt;
	&lt;li&gt;Stop the server, without closing the shell, and start a 3.0.7 server.&lt;/li&gt;
	&lt;li&gt;Re-issue the query.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;This fails for me, as before, with the &quot;&lt;tt&gt;cannot translate opcode&lt;/tt&gt;&quot; error. This happens because the shell is attempting to send a find command using the OP_COMMAND protocol, which is not recognized by a 3.0.7 server. I still think that the resolution of this ticket will be to provide better behavior under &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-20915&quot; title=&quot;Resolve shell readMode on connection open&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-20915&quot;&gt;&lt;del&gt;SERVER-20915&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="1089158" author="jonathan.abrahams" created="Mon, 16 Nov 2015 14:54:23 +0000"  >&lt;p&gt;I am unable to connect to mongod (master, v3.2.0-rc2-189-g442fdaa)  from mongo shell (3.2.0-rc2) with this error:&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;mongo 52.91.136.249&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;MongoDB shell version: 3.2.0-rc2&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;connecting to: 52.91.136.249/test&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;2015-11-16T09:52:25.571-0500 E QUERY    [thread1] Error: error doing query: failed :&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;DB.prototype.runCommand@src/mongo/shell/db.js:132:1&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;DB.prototype.adminCommand@src/mongo/shell/db.js:149:12&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;shellHelper.show@src/mongo/shell/utils.js:772:23&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;shellHelper@src/mongo/shell/utils.js:591:15&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;@(shellwarnings:1:1&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;2015-11-16T09:52:25.573-0500 I NETWORK  [thread1] trying reconnect to 52.91.136.249:27017 (52.91.136.249) failed&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;2015-11-16T09:52:25.602-0500 I NETWORK  [thread1] reconnect 52.91.136.249:27017 (52.91.136.249) ok&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;&amp;gt; show dbs&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;2015-11-16T09:52:40.946-0500 I NETWORK  [thread1] trying reconnect to 52.91.136.249:27017 (52.91.136.249) failed&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;2015-11-16T09:52:41.004-0500 I NETWORK  [thread1] reconnect 52.91.136.249:27017 (52.91.136.249) ok&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;2015-11-16T09:52:41.017-0500 E QUERY    [thread1] Error: error doing query: failed :&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;DB.prototype.runCommand@src/mongo/shell/db.js:132:1&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;Mongo.prototype.getDBs@src/mongo/shell/mongo.js:51:15&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;shellHelper.show@src/mongo/shell/utils.js:697:19&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;shellHelper@src/mongo/shell/utils.js:591:15&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;@(shellhelp2):1:1&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;2015-11-16T09:52:41.020-0500 I NETWORK  [thread1] trying reconnect to 52.91.136.249:27017 (52.91.136.249) failed&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;2015-11-16T09:52:41.045-0500 I NETWORK  [thread1] reconnect 52.91.136.249:27017 (52.91.136.249) ok&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;I do not think this is an improvement ticket, but now a bug.&lt;/p&gt;</comment>
                            <comment id="1070329" author="david.storch" created="Mon, 26 Oct 2015 14:24:01 +0000"  >&lt;p&gt;Right now, if a particular readMode is not forced, the shell auto-detects readMode based on the wire version. The result of resolving the readMode is cached for the lifetime of the shell process. This is why the shell currently keeps using readMode &quot;commands&quot; even after making a new connection to an older server that doesn&apos;t support the find/getMore commands.&lt;/p&gt;

&lt;p&gt;Under &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-20915&quot; title=&quot;Resolve shell readMode on connection open&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-20915&quot;&gt;&lt;del&gt;SERVER-20915&lt;/del&gt;&lt;/a&gt; we are planning to resolve the readMode on connection open. I believe this will cause us to fallback to &quot;legacy&quot; mode when reconnecting to an older server. Assigning to &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jonathan.reams&quot; class=&quot;user-hover&quot; rel=&quot;jonathan.reams&quot;&gt;jonathan.reams&lt;/a&gt; to confirm that this is the case (and if so, resolve as a duplicate).&lt;/p&gt;</comment>
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