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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-23073] Aggregation checks the output collection&apos;s sharding state without collection lock</title>
                <link>https://jira.mongodb.org/browse/SERVER-23073</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The aggregation framework checks the output collection&apos;s sharding state without holding collection lock. This might cause it to see inconsistent state if the collection is currently being made sharded.&lt;/p&gt;

&lt;p&gt;This was caught by changing the version checking code to go through the newly introduced CollectionShardingState class instead of accessing the sharded collection metadata directly.&lt;/p&gt;

&lt;p&gt;While this is not a pressing issue it would be nice to fix it so we can switch to storing the per-collection sharding information as decoration on the collection itself.&lt;/p&gt;

&lt;p&gt;This is the call stack in question:&lt;/p&gt;
&lt;p/&gt;
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&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;[MongoDFixture:job0] 2016-03-10T15:59:04.172-0500 I -        [conn2] Invariant failure txn-&amp;gt;lockState()-&amp;gt;isCollectionLockedForMode(ns, MODE_IS) src\mongo\db\s\collection_sharding_state.cpp 64&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;[MongoDFixture:job0] 2016-03-10T15:59:04.172-0500 I -        [conn2]&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;[MongoDFixture:job0]&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;[MongoDFixture:job0] ***aborting after invariant() failure&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;[MongoDFixture:job0]&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;[MongoDFixture:job0]&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;[MongoDFixture:job0] 2016-03-10T15:59:04.992-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\util\stacktrace_windows.cpp(174)                                   mongo::printStackTrace+0x5b&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;[MongoDFixture:job0] 2016-03-10T15:59:04.992-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\util\signal_handlers_synchronous.cpp(181)                          mongo::`anonymous namespace&apos;::printSignalAndBacktrace+0x84&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;[MongoDFixture:job0] 2016-03-10T15:59:04.992-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\util\signal_handlers_synchronous.cpp(238)                          mongo::`anonymous namespace&apos;::abruptQuit+0x39&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;[MongoDFixture:job0] 2016-03-10T15:59:04.992-0500 I CONTROL  [conn2] MSVCR120D.dll                                                                                   raise+0x35f&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;[MongoDFixture:job0] 2016-03-10T15:59:04.992-0500 I CONTROL  [conn2] MSVCR120D.dll                                                                                   abort+0x40&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;[MongoDFixture:job0] 2016-03-10T15:59:04.993-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\util\assert_util.cpp(154)                                          mongo::invariantFailed+0x13d&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;[MongoDFixture:job0] 2016-03-10T15:59:04.993-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\db\s\collection_sharding_state.cpp(64)                             mongo::CollectionShardingState::get+0xc5&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;[MongoDFixture:job0] 2016-03-10T15:59:04.993-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\db\s\collection_sharding_state.cpp(59)                             mongo::CollectionShardingState::get+0x3a&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;[MongoDFixture:job0] 2016-03-10T15:59:04.993-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\db\pipeline\pipeline_d.cpp(87)                                     mongo::`anonymous namespace&apos;::MongodImplementation::isSharded+0x42&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;[MongoDFixture:job0] 2016-03-10T15:59:04.993-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\db\pipeline\document_source_out.cpp(63)                            mongo::DocumentSourceOut::prepTempCollection+0x184&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;[MongoDFixture:job0] 2016-03-10T15:59:04.993-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\db\pipeline\document_source_out.cpp(129)                           mongo::DocumentSourceOut::getNext+0x159&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;[MongoDFixture:job0] 2016-03-10T15:59:04.993-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\db\exec\pipeline_proxy.cpp(126)                                    mongo::PipelineProxyStage::getNextBson+0x8d&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;[MongoDFixture:job0] 2016-03-10T15:59:04.993-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\db\exec\pipeline_proxy.cpp(72)                                     mongo::PipelineProxyStage::doWork+0x178&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;[MongoDFixture:job0] 2016-03-10T15:59:04.993-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\db\exec\plan_stage.cpp(43)                                         mongo::PlanStage::work+0x6d&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;[MongoDFixture:job0] 2016-03-10T15:59:04.993-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\db\query\plan_executor.cpp(403)                                    mongo::PlanExecutor::getNextImpl+0x789&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;[MongoDFixture:job0] 2016-03-10T15:59:04.993-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\db\query\plan_executor.cpp(323)                                    mongo::PlanExecutor::getNext+0x7c&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;[MongoDFixture:job0] 2016-03-10T15:59:04.993-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\db\commands\pipeline_command.cpp(95)                               mongo::handleCursorCommand+0x23d&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;[MongoDFixture:job0] 2016-03-10T15:59:04.994-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\db\commands\pipeline_command.cpp(306)                              mongo::PipelineCommand::run+0xe8a&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;[MongoDFixture:job0] 2016-03-10T15:59:04.994-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\db\dbcommands.cpp(1493)                                            mongo::Command::run+0xc70&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;[MongoDFixture:job0] 2016-03-10T15:59:04.994-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\db\dbcommands.cpp(1356)                                            mongo::Command::execCommand+0xfd4&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;[MongoDFixture:job0] 2016-03-10T15:59:04.994-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\db\instance.cpp(307)                                               mongo::`anonymous namespace&apos;::receivedRpc+0x23c&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;[MongoDFixture:job0] 2016-03-10T15:59:04.994-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\db\instance.cpp(531)                                               mongo::assembleResponse+0x877&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;[MongoDFixture:job0] 2016-03-10T15:59:04.994-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\db\db.cpp(174)                                                     mongo::MyMessageHandler::process+0x158&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;[MongoDFixture:job0] 2016-03-10T15:59:05.006-0500 I CONTROL  [conn2] mongod.exe     ...\src\mongo\util\net\message_server_port.cpp(231)                              mongo::PortMessageServer::handleIncomingMsg+0x509&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;[MongoDFixture:job0] 2016-03-10T15:59:05.016-0500 I CONTROL  [conn2] mongod.exe     c:\program files (x86)\microsoft visual studio 12.0\vc\include\functional(1150)  std::_Bind&amp;lt;1,void * __ptr64,void * __ptr64 (__cdecl*const)(void * __ptr64),mongo::`anonymous namespace&apos;::MessagingPortWithHandler * __ptr64&amp;gt;::_Do_call&amp;lt;,0&amp;gt;+0x6e&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;[MongoDFixture:job0] 2016-03-10T15:59:05.036-0500 I CONTROL  [conn2] mongod.exe     c:\program files (x86)\microsoft visual studio 12.0\vc\include\functional(1138)  std::_Bind&amp;lt;1,void * __ptr64,void * __ptr64 (__cdecl*const)(void * __ptr64),mongo::`anonymous namespace&apos;::MessagingPortWithHandler * __ptr64&amp;gt;::operator()&amp;lt;&amp;gt;+0x56&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;[MongoDFixture:job0] 2016-03-10T15:59:05.048-0500 I CONTROL  [conn2] mongod.exe     c:\program files (x86)\microsoft visual studio 12.0\vc\include\functional(1150)  std::_Bind&amp;lt;0,void,std::_Bind&amp;lt;1,void * __ptr64,void * __ptr64 (__cdecl*const)(void * __ptr64),mongo::`anonymous namespace&apos;::MessagingPortWithHandler * __ptr64&amp;gt; &amp;gt;::_Do_call&amp;lt;&amp;gt;+0x35&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;[MongoDFixture:job0] 2016-03-10T15:59:05.056-0500 I CONTROL  [conn2] mongod.exe     c:\program files (x86)\microsoft visual studio 12.0\vc\include\functional(1138)  std::_Bind&amp;lt;0,void,std::_Bind&amp;lt;1,void * __ptr64,void * __ptr64 (__cdecl*const)(void * __ptr64),mongo::`anonymous namespace&apos;::MessagingPortWithHandler * __ptr64&amp;gt; &amp;gt;::operator()&amp;lt;&amp;gt;+0x56&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;[MongoDFixture:job0] 2016-03-10T15:59:05.074-0500 I CONTROL  [conn2] mongod.exe     c:\program files (x86)\microsoft visual studio 12.0\vc\include\thr\xthread(196)  std::_LaunchPad&amp;lt;std::_Bind&amp;lt;0,void,std::_Bind&amp;lt;1,void * __ptr64,void * __ptr64 (__cdecl*const)(void * __ptr64),mongo::`anonymous namespace&apos;::MessagingPortWithHandler * __ptr64&amp;gt; &amp;gt; &amp;gt;::_Run+0x51&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;[MongoDFixture:job0] 2016-03-10T15:59:05.091-0500 I CONTROL  [conn2] mongod.exe     c:\program files (x86)\microsoft visual studio 12.0\vc\include\thr\xthread(188)  std::_LaunchPad&amp;lt;std::_Bind&amp;lt;0,void,std::_Bind&amp;lt;1,void * __ptr64,void * __ptr64 (__cdecl*const)(void * __ptr64),mongo::`anonymous namespace&apos;::MessagingPortWithHandler * __ptr64&amp;gt; &amp;gt; &amp;gt;::_Go+0x28&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;[MongoDFixture:job0] 2016-03-10T15:59:05.099-0500 I CONTROL  [conn2] MSVCP120D.dll                                                                                   std::_Pad::_Release+0xd9&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;[MongoDFixture:job0] 2016-03-10T15:59:05.107-0500 I CONTROL  [conn2] MSVCR120D.dll                                                                                   beginthreadex+0x1f5&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;[MongoDFixture:job0] 2016-03-10T15:59:05.113-0500 I CONTROL  [conn2] MSVCR120D.dll                                                                                   endthreadex+0x1d7&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;[MongoDFixture:job0] 2016-03-10T15:59:05.121-0500 I CONTROL  [conn2] KERNEL32.DLL                                                                                    BaseThreadInitThunk+0x22&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;[MongoDFixture:job0] 2016-03-10T15:59:05.128-0500 F -        [conn2] Got signal: 22 (SIGABRT).&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;[MongoDFixture:job0] 2016-03-10T15:59:05.136-0500 I CONTROL  [conn2] writing minidump diagnostic file E:\workspace\mongo\mongod.2016-03-10T20-59-05.mdmp&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</description>
                <environment></environment>
        <key id="271604">SERVER-23073</key>
            <summary>Aggregation checks the output collection&apos;s sharding state without collection lock</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="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                    </labels>
                <created>Thu, 10 Mar 2016 21:35:33 +0000</created>
                <updated>Sat, 13 Aug 2016 00:07:13 +0000</updated>
                            <resolved>Mon, 18 Jul 2016 23:01:33 +0000</resolved>
                                    <version>3.2.4</version>
                    <version>3.3.2</version>
                                    <fixVersion>3.3.11</fixVersion>
                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>10</watches>
                                                                                                                <comments>
                            <comment id="1327713" author="xgen-internal-githook" created="Mon, 18 Jul 2016 22:59:13 +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;cswanson310@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23073&quot; title=&quot;Aggregation checks the output collection&amp;#39;s sharding state without collection lock&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23073&quot;&gt;&lt;del&gt;SERVER-23073&lt;/del&gt;&lt;/a&gt; Reliably detect concurrent changes to $out collection.&lt;/p&gt;

&lt;p&gt;A $out stage will write to a temporary collection, and then rename into&lt;br/&gt;
the target collection. If the original collection is sharded, has its&lt;br/&gt;
options changed, or changes its indexes during processing, the&lt;br/&gt;
aggregation should fail.&lt;/p&gt;

&lt;p&gt;This change removes any race conditions around detecting these changes.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e420c60e6c6fcdf1ba0d65d58e41ab85c09c0f51&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e420c60e6c6fcdf1ba0d65d58e41ab85c09c0f51&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1327712" author="xgen-internal-githook" created="Mon, 18 Jul 2016 22:59:12 +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;cswanson310@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23073&quot; title=&quot;Aggregation checks the output collection&amp;#39;s sharding state without collection lock&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23073&quot;&gt;&lt;del&gt;SERVER-23073&lt;/del&gt;&lt;/a&gt; Check if either collection is sharded before renaming.&lt;/p&gt;

&lt;p&gt;This was previously checked at the mongos level. This check now also&lt;br/&gt;
happens on the mongod.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8a487d846954ff28df781bab07257694cacfd6aa&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8a487d846954ff28df781bab07257694cacfd6aa&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1300168" author="charlie.swanson" created="Mon, 20 Jun 2016 19:18:24 +0000"  >&lt;p&gt;Sure, I&apos;ve put it in our next iteration.&lt;/p&gt;</comment>
                            <comment id="1300084" author="kaloian.manassiev" created="Mon, 20 Jun 2016 18:11:24 +0000"  >&lt;p&gt;The linked ticket is in code review because we are able to remove all usages of &lt;tt&gt;ShardingState::getCollectionMetadata&lt;/tt&gt; except for the one in the aggregation framework. We cannot resolve &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-24664&quot; title=&quot;Get rid of calls to ShardingState::getCollectionMetadata&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24664&quot;&gt;&lt;del&gt;SERVER-24664&lt;/del&gt;&lt;/a&gt; before this ticket has been fixed, that&apos;s why there is no fix version.&lt;/p&gt;

&lt;p&gt;Nobody from the sharding team understands the aggregation framework locking rules sufficiently to make this change, so it is preferable that you guys fix it &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;Can you please triage it and let me know whether fixing it in the next iteration sounds feasible. Otherwise we might need to implement some kind of workaround.&lt;/p&gt;</comment>
                            <comment id="1300005" author="charlie.swanson" created="Mon, 20 Jun 2016 17:32:19 +0000"  >&lt;p&gt;So does that mean this should be in &quot;3.3 Required&quot;? It looks like the linked ticket is in code review, but without a FixVersion... Is this work that the sharding team could do?&lt;/p&gt;</comment>
                            <comment id="1300003" author="kaloian.manassiev" created="Mon, 20 Jun 2016 17:29:24 +0000"  >&lt;p&gt;As part of the changes for improving the RangeDeleter and parallel migrations, we want to have a single place to obtain the per-collection sharding metadata and to have this place enforce the proper collection locks, so we don&apos;t have to have a separate mutex for synchronization (see &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-24664&quot; title=&quot;Get rid of calls to ShardingState::getCollectionMetadata&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24664&quot;&gt;&lt;del&gt;SERVER-24664&lt;/del&gt;&lt;/a&gt;). This is the only code path, which accesses collection metadata without proper locks.&lt;/p&gt;
</comment>
                            <comment id="1244164" author="ian@10gen.com" created="Fri, 22 Apr 2016 18:16:45 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kaloian.manassiev&quot; class=&quot;user-hover&quot; rel=&quot;kaloian.manassiev&quot;&gt;kaloian.manassiev&lt;/a&gt; can you offer any context on why did you put this straight into required?  does it need to be done for 3.4?&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
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