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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-27258] A v3.4 config server can crash with a core dump if it gets an unsupported shard key from mongo S.</title>
                <link>https://jira.mongodb.org/browse/SERVER-27258</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hello,&lt;/p&gt;

&lt;p&gt;First of all I&apos;m not looking for support on this, I&apos;m not even sure if it&apos;s considered a bug but it seems like it&apos;s a bit dangerous.&lt;/p&gt;

&lt;p&gt;I&apos;m working on adding a new feature to mongodb and have been modifying the code for mongo S (&lt;ins&gt;not mongod/config server&lt;/ins&gt;, which is the one I&apos;m able to crash remotely).&lt;/p&gt;

&lt;p&gt;Essentially I modified the mongo/s/shard_key_pattern.cpp to also accept &quot;2dsphere&quot; as a valid sharding key and then from the mongo shell called shardCollection with a 2dsphere key (index already configured). The config server promptly crashed with a core dump and the following backtrace:&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;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;2016-12-01T19:16:15.150+0000 I SHARDING [Balancer] ChunkManager loading chunks for wells_US.points sequenceNumber: 2 based on: (empty)&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;2016-12-01T19:16:15.151+0000 I SHARDING [Balancer] ChunkManager load took 0 ms and found version 1|0||584074beec62237f36f52c7e&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;2016-12-01T19:16:15.151+0000 I -        [Balancer] Invariant failure !ci.key().isEmpty() src/mongo/s/config.cpp 296&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;2016-12-01T19:16:15.151+0000 I -        [Balancer] &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;***aborting after invariant() failure&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;&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;2016-12-01T19:16:15.165+0000 F -        [Balancer] Got signal: 6 (Aborted).&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; 0x56062610df71 0x56062610d069 0x56062610d54d 0x7fc771ae93e0 0x7fc771744428 0x7fc77174602a 0x5606253db006 0x560625fbde17 0x560625ff44de 0x560625c55903 0x560625c57310 0x560625c47045 0x560625c4dbe9 0x7fc7722ccc80 0x7fc771adf70a 0x7fc77181582d&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;560624C42000&quot;,&quot;o&quot;:&quot;14CBF71&quot;,&quot;s&quot;:&quot;_ZN5mongo15printStackTraceERSo&quot;},{&quot;b&quot;:&quot;560624C42000&quot;,&quot;o&quot;:&quot;14CB069&quot;},{&quot;b&quot;:&quot;560624C42000&quot;,&quot;o&quot;:&quot;14CB54D&quot;},{&quot;b&quot;:&quot;7FC771AD8000&quot;,&quot;o&quot;:&quot;113E0&quot;},{&quot;b&quot;:&quot;7FC77170F000&quot;,&quot;o&quot;:&quot;35428&quot;,&quot;s&quot;:&quot;gsignal&quot;},{&quot;b&quot;:&quot;7FC77170F000&quot;,&quot;o&quot;:&quot;3702A&quot;,&quot;s&quot;:&quot;abort&quot;},{&quot;b&quot;:&quot;560624C42000&quot;,&quot;o&quot;:&quot;799006&quot;,&quot;s&quot;:&quot;_ZN5mongo17invariantOKFailedEPKcRKNS_6StatusES1_j&quot;},{&quot;b&quot;:&quot;560624C42000&quot;,&quot;o&quot;:&quot;137BE17&quot;,&quot;s&quot;:&quot;_ZN5mongo8DBConfig15getChunkManagerEPNS_16OperationContextERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEbb&quot;},{&quot;b&quot;:&quot;560624C42000&quot;,&quot;o&quot;:&quot;13B24DE&quot;,&quot;s&quot;:&quot;_ZN5mongo18ScopedChunkManager11getExistingEPNS_16OperationContextERKNS_15NamespaceStringE&quot;},{&quot;b&quot;:&quot;560624C42000&quot;,&quot;o&quot;:&quot;1013903&quot;,&quot;s&quot;:&quot;_ZN5mongo32BalancerChunkSelectionPolicyImpl32_getSplitCandidatesForCollectionEPNS_16OperationContextERKNS_15NamespaceStringERKSt6vectorINS_17ClusterStatistics15ShardStatisticsESaIS8_EE&quot;},{&quot;b&quot;:&quot;560624C42000&quot;,&quot;o&quot;:&quot;1015310&quot;,&quot;s&quot;:&quot;_ZN5mongo32BalancerChunkSelectionPolicyImpl19selectChunksToSplitEPNS_16OperationContextE&quot;},{&quot;b&quot;:&quot;560624C42000&quot;,&quot;o&quot;:&quot;1005045&quot;,&quot;s&quot;:&quot;_ZN5mongo8Balancer17_enforceTagRangesEPNS_16OperationContextE&quot;},{&quot;b&quot;:&quot;560624C42000&quot;,&quot;o&quot;:&quot;100BBE9&quot;,&quot;s&quot;:&quot;_ZN5mongo8Balancer11_mainThreadEv&quot;},{&quot;b&quot;:&quot;7FC772214000&quot;,&quot;o&quot;:&quot;B8C80&quot;},{&quot;b&quot;:&quot;7FC771AD8000&quot;,&quot;o&quot;:&quot;770A&quot;},{&quot;b&quot;:&quot;7FC77170F000&quot;,&quot;o&quot;:&quot;10682D&quot;,&quot;s&quot;:&quot;clone&quot;}],&quot;processInfo&quot;:{ &quot;mongodbVersion&quot; : &quot;3.4.0-rc5&quot;, &quot;gitVersion&quot; : &quot;7df8fe1099135d137516f1670d2a0091ace63ca0&quot;, &quot;compiledModules&quot; : [], &quot;uname&quot; : { &quot;sysname&quot; : &quot;Linux&quot;, &quot;release&quot; : &quot;4.4.0-47-generic&quot;, &quot;version&quot; : &quot;#68-Ubuntu SMP Wed Oct 26 19:39:52 UTC 2016&quot;, &quot;machine&quot; : &quot;x86_64&quot; }, &quot;somap&quot; : [ { &quot;b&quot; : &quot;560624C42000&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;150938CE464DB3BAEAD640507516D58AEAE68656&quot; }, { &quot;b&quot; : &quot;7FFE89DFD000&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;263FD15D8149B82F2DB14A1E6C3351C2D9F4852C&quot; }, { &quot;b&quot; : &quot;7FC77279A000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/librt.so.1&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;4ABAAF20AC90D3E282D770F6A0C58A80BF16145A&quot; }, { &quot;b&quot; : &quot;7FC772596000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/libdl.so.2&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;09758D5225753BBF1FE3F66AADCCB6EC6F6E244B&quot; }, { &quot;b&quot; : &quot;7FC772214000&quot;, &quot;path&quot; : &quot;/usr/lib/x86_64-linux-gnu/libstdc++.so.6&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;144E588F94CAFAFDBD0BD1499C74190F678DAD88&quot; }, { &quot;b&quot; : &quot;7FC771F0B000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/libm.so.6&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;9247F19167971267B6FADF4BA633290188A5483B&quot; }, { &quot;b&quot; : &quot;7FC771CF5000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/libgcc_s.so.1&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;68220AE2C65D65C1B6AAA12FA6765A6EC2F5F434&quot; }, { &quot;b&quot; : &quot;7FC771AD8000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/libpthread.so.0&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;3B58B373BD25A13045DCD3FCE540203DE330AC8E&quot; }, { &quot;b&quot; : &quot;7FC77170F000&quot;, &quot;path&quot; : &quot;/lib/x86_64-linux-gnu/libc.so.6&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;A594A9C73A6067AB00A0F8DB78D665BE147ACDC1&quot; }, { &quot;b&quot; : &quot;7FC7729A2000&quot;, &quot;path&quot; : &quot;/lib64/ld-linux-x86-64.so.2&quot;, &quot;elfType&quot; : 3, &quot;buildId&quot; : &quot;F6DCBEE8DCAAE97C8BF7E73B56514E67118E6118&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+0x41) [0x56062610df71]&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(+0x14CB069) [0x56062610d069]&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(+0x14CB54D) [0x56062610d54d]&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(+0x113E0) [0x7fc771ae93e0]&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(gsignal+0x38) [0x7fc771744428]&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(abort+0x16A) [0x7fc77174602a]&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(_ZN5mongo17invariantOKFailedEPKcRKNS_6StatusES1_j+0x0) [0x5606253db006]&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(_ZN5mongo8DBConfig15getChunkManagerEPNS_16OperationContextERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEbb+0x1267) [0x560625fbde17]&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(_ZN5mongo18ScopedChunkManager11getExistingEPNS_16OperationContextERKNS_15NamespaceStringE+0xAE) [0x560625ff44de]&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(_ZN5mongo32BalancerChunkSelectionPolicyImpl32_getSplitCandidatesForCollectionEPNS_16OperationContextERKNS_15NamespaceStringERKSt6vectorINS_17ClusterStatistics15ShardStatisticsESaIS8_EE+0x53) [0x560625c55903]&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(_ZN5mongo32BalancerChunkSelectionPolicyImpl19selectChunksToSplitEPNS_16OperationContextE+0x270) [0x560625c57310]&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(_ZN5mongo8Balancer17_enforceTagRangesEPNS_16OperationContextE+0x55) [0x560625c47045]&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(_ZN5mongo8Balancer11_mainThreadEv+0x11C9) [0x560625c4dbe9]&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; libstdc++.so.6(+0xB8C80) [0x7fc7722ccc80]&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(+0x770A) [0x7fc771adf70a]&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) [0x7fc77181582d]&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;&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;Like I said, I&apos;m not sure if this is considered a problem or not.&lt;br/&gt;
I can give more details if this looks relevant to the stability/security of the config server.&lt;/p&gt;</description>
                <environment></environment>
        <key id="335615">SERVER-27258</key>
            <summary>A v3.4 config server can crash with a core dump if it gets an unsupported shard key from mongo S.</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</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="nathan.myers">Nathan Myers</assignee>
                                    <reporter username="ric2b">Ricardo Amendoeira</reporter>
                        <labels>
                            <label>crash</label>
                    </labels>
                <created>Thu, 1 Dec 2016 19:56:56 +0000</created>
                <updated>Wed, 5 Apr 2017 11:42:03 +0000</updated>
                            <resolved>Wed, 28 Dec 2016 19:49:28 +0000</resolved>
                                                    <fixVersion>3.4.2</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="1466081" author="xgen-internal-githook" created="Wed, 28 Dec 2016 19:45:55 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;name&apos;: u&apos;Nathan Myers&apos;, u&apos;email&apos;: u&apos;ncm@asperasoft.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-27258&quot; title=&quot;A v3.4 config server can crash with a core dump if it gets an unsupported shard key from mongo S.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-27258&quot;&gt;&lt;del&gt;SERVER-27258&lt;/del&gt;&lt;/a&gt; Config server not crash on bad shard key&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/906e79d74ac9c594e9ad402ac2fd0c8520874bd7&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/906e79d74ac9c594e9ad402ac2fd0c8520874bd7&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1456832" author="ric2b" created="Tue, 13 Dec 2016 20:34:17 +0000"  >&lt;p&gt;Hi Kaloian Manassiev,&lt;/p&gt;

&lt;p&gt;If I understood correctly you wanted a &lt;tt&gt;mongodump --oplog&lt;/tt&gt; of the config server, right? &lt;br/&gt;
I attached it here: &lt;span class=&quot;nobr&quot;&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/attachment/145950/145950_config-backup.tar.gz&quot; title=&quot;config-backup.tar.gz attached to SERVER-27258&quot;&gt;config-backup.tar.gz&lt;sup&gt;&lt;img class=&quot;rendericon&quot; src=&quot;https://jira.mongodb.org/images/icons/link_attachment_7.gif&quot; height=&quot;7&quot; width=&quot;7&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/sup&gt;&lt;/a&gt;&lt;/span&gt;&lt;br/&gt;
I hope it helps &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/smile.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Ricardo Amendoeira&lt;/p&gt;</comment>
                            <comment id="1455349" author="kaloian.manassiev" created="Mon, 12 Dec 2016 17:07:18 +0000"  >&lt;p&gt;Thanks &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=ric2b&quot; class=&quot;user-hover&quot; rel=&quot;ric2b&quot;&gt;ric2b&lt;/a&gt;. We will use this ticket to add guardrails to the config server so it does not crash.&lt;/p&gt;

&lt;p&gt;Do you mind stopping the balancer by issuing &lt;tt&gt;sh.stopBalancer&lt;/tt&gt;, then sharding the collection using the command above and your custom build and then taking a dump of the config server so we can have the data to reproduce the problem with?&lt;/p&gt;

&lt;p&gt;Thanks in advance.&lt;/p&gt;

&lt;p&gt;-Kal.&lt;/p&gt;</comment>
                            <comment id="1453777" author="ric2b" created="Fri, 9 Dec 2016 13:49:16 +0000"  >&lt;p&gt;Ok, sorry for the delay. I just confirmed the issue, compiled mongod clean from the 3.4 tag and was still able to crash the config server by issuing &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;sh.shardCollection(&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;wells_US.points&quot;&lt;/span&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;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;geometry.coordinates&quot;&lt;/span&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;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;2dsphere&quot;&lt;/span&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;to the mongoS server.&lt;br/&gt;
The mongoS &lt;em&gt;is&lt;/em&gt; modified to accept a 2dsphere sharding key, although it&apos;s probably buggy since I&apos;m still learning the project code and can&apos;t still properly test what I&apos;m doing. &lt;/p&gt;</comment>
                            <comment id="1447644" author="ric2b" created="Fri, 2 Dec 2016 13:17:31 +0000"  >&lt;p&gt;I&apos;ve only been building mongo (shell) and mongos, yes.&lt;br/&gt;
I&apos;ve built mongod myself as well but that was a few weeks ago, before the changes, unless I accidentally ran scons all in the meantime and didn&apos;t notice.&lt;/p&gt;

&lt;p&gt;I&apos;ll make sure I rebuild mongod from the 3.4 tag and get back to you, but I can&apos;t do it right now.&lt;/p&gt;</comment>
                            <comment id="1447643" author="kaloian.manassiev" created="Fri, 2 Dec 2016 13:11:27 +0000"  >&lt;p&gt;The code, which is shown in the call stack runs both on mongos and mongod. Are you saying that you &lt;b&gt;only&lt;/b&gt; built mongos, but not mongod (i.e., you&apos;re using 3.4.0 for these) and it still crashes, or you built all three?&lt;/p&gt;

&lt;p&gt;If stock 3.4 crashes, then can you please dump the config database and attach it?&lt;/p&gt;</comment>
                            <comment id="1447624" author="ric2b" created="Fri, 2 Dec 2016 12:26:18 +0000"  >&lt;p&gt;Ok, thanks for the response. I just find it a bit weird that a server is able to crash another, unmodified, server. But I understand if the config server is supposed to be in a protected network and will (hopefully) only receive messages from trusted servers.&lt;/p&gt;</comment>
                            <comment id="1447234" author="kaloian.manassiev" created="Thu, 1 Dec 2016 20:36:30 +0000"  >&lt;p&gt;What seems to be happening here is that the contents of the shard key BSON are empty. This is something, which would have been caught at an earlier stage, while parsing the collection description in &lt;tt&gt;CollectionType::fromBSON&lt;/tt&gt;, which is eventually called by &lt;tt&gt;DBConfig::_loadIfNeeded&lt;/tt&gt;.&lt;/p&gt;

&lt;p&gt;Is it possible that any of your changes caused the checks in there to be bypassed and the in-memory representation of the collection to end up with an invalid shard key?&lt;/p&gt;

&lt;p&gt;In either case, this is not a supported scenario and is more appropriate for the &lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mongodb-users group&lt;/a&gt; or &lt;a href=&quot;http://stackoverflow.com/questions/tagged/mongodb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Stack Overflow with the &lt;tt&gt;mongodb&lt;/tt&gt; tag&lt;/a&gt;. Please post it there for more discussion.&lt;/p&gt;

&lt;p&gt;Best regards,&lt;br/&gt;
-Kal.&lt;/p&gt;</comment>
                    </comments>
                    <attachments>
                            <attachment id="145950" name="config-backup.tar.gz" size="2221" author="ric2b" created="Tue, 13 Dec 2016 20:31:03 +0000"/>
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