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


<item>
            <title>[SERVER-26003] Deadlock at replication stepdown involving the NoopWriter</title>
                <link>https://jira.mongodb.org/browse/SERVER-26003</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The following very intricate deadlock can be hit at replication stepdown:&lt;/p&gt;

&lt;ol&gt;
	&lt;li&gt;T1 executes &lt;tt&gt;ReplicationCoordinatorImpl::stepDown&lt;/tt&gt; which schedules a thread (T2) to do the actual step down and then calls &lt;tt&gt;ServiceContext::killAllUserOperations&lt;/tt&gt;, which holds the ServiceContext mutex while iterating the set of clients. For each operation, which is killed, &lt;tt&gt;ReplicationCoordinatorImpl::interrupt&lt;/tt&gt; is invoked, which acquires the &lt;tt&gt;_topoMutex&lt;/tt&gt;.&lt;/li&gt;
	&lt;li&gt;T2 runs &lt;tt&gt;ReplicationCoordinatorImpl::_stepDownFinish&lt;/tt&gt;, which acquires the replication coordinator&apos;s &lt;tt&gt;_topoMutex&lt;/tt&gt; and calls &lt;tt&gt;_performPostMemberStateUpdateAction(kActionCloseAllConnections)&lt;/tt&gt; while holding that mutex. The call to &lt;tt&gt;_performPostMemberStateUpdateAction&lt;/tt&gt; eventually tries to stop the &lt;tt&gt;NoopWriter&lt;/tt&gt;, which waits for that thread (T3) to join.&lt;/li&gt;
	&lt;li&gt;T3 (PeriodicNoopRunner::run) is signaled to terminate and as part of its destructor tries to unregister its client from the ServiceContext. However, the service context lock is held by T1 above, which deadlocks.&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;This is the list of threads, which are involved in the deadlock:&lt;/p&gt;

&lt;p&gt;T1:&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; [2016/09/06 22:35:19.725] Thread 1049 (Thread 0x7fc46de6d700 (LWP 11173)):&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; [2016/09/06 22:35:19.725] #0  0x00007fc4aac21334 in __lll_lock_wait () from /lib64/libpthread.so.0&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; [2016/09/06 22:35:19.725] #1  0x00007fc4aac1c5d8 in _L_lock_854 () from /lib64/libpthread.so.0&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; [2016/09/06 22:35:19.726] #2  0x00007fc4aac1c4a7 in pthread_mutex_lock () from /lib64/libpthread.so.0&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; [2016/09/06 22:35:19.726] #3  0x00007fc4ae70eff1 in mongo::repl::ReplicationCoordinatorImpl::interrupt(unsigned int) ()&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; [2016/09/06 22:35:19.726] #4  0x00007fc4ae84e46c in mongo::ServiceContext::killOperation(mongo::OperationContext*, mongo::ErrorCodes::Error) ()&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; [2016/09/06 22:35:19.726] #5  0x00007fc4ae84e558 in mongo::ServiceContext::killAllUserOperations(mongo::OperationContext const*, mongo::ErrorCodes::Error) ()&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; [2016/09/06 22:35:19.726] #6  0x00007fc4ae71def1 in mongo::repl::ReplicationCoordinatorImpl::stepDown_nonBlocking(mongo::OperationContext*, bool, mongo::Duration&amp;lt;std::ratio&amp;lt;1l, 1000l&amp;gt; &amp;gt; const&amp;amp;, mongo::Duration&amp;lt;std::ratio&amp;lt;1l, 1000l&amp;gt; &amp;gt; const&amp;amp;, mongo::Status*) ()&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; [2016/09/06 22:35:19.727] #7  0x00007fc4ae71e27a in mongo::repl::ReplicationCoordinatorImpl::stepDown(mongo::OperationContext*, bool, mongo::Duration&amp;lt;std::ratio&amp;lt;1l, 1000l&amp;gt; &amp;gt; const&amp;amp;, mongo::Duration&amp;lt;std::ratio&amp;lt;1l, 1000l&amp;gt; &amp;gt; const&amp;amp;) ()&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; [2016/09/06 22:35:19.727] #8  0x00007fc4ae74f046 in mongo::repl::CmdReplSetStepDown::run(mongo::OperationContext*, std::__cxx11::basic_string&amp;lt;char, std::char_traits&amp;lt;char&amp;gt;, std::allocator&amp;lt;char&amp;gt; &amp;gt; const&amp;amp;, mongo::BSONObj&amp;amp;, int, std::__cxx11::basic_string&amp;lt;char, std::char_traits&amp;lt;char&amp;gt;, std::allocator&amp;lt;char&amp;gt; &amp;gt;&amp;amp;, mongo::BSONObjBuilder&amp;amp;) ()&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; [2016/09/06 22:35:19.727] #9  0x00007fc4ae104447 in mongo::Command::run(mongo::OperationContext*, mongo::rpc::RequestInterface const&amp;amp;, mongo::rpc::ReplyBuilderInterface*) ()&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; [2016/09/06 22:35:19.727] #10 0x00007fc4ae105663 in mongo::Command::execCommand(mongo::OperationContext*, mongo::Command*, mongo::rpc::RequestInterface const&amp;amp;, mongo::rpc::ReplyBuilderInterface*) ()&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; [2016/09/06 22:35:19.727] #11 0x00007fc4ae7b0b4d in mongo::runCommands(mongo::OperationContext*, mongo::rpc::RequestInterface const&amp;amp;, mongo::rpc::ReplyBuilderInterface*) ()&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; [2016/09/06 22:35:19.728] #12 0x00007fc4ae31c889 in mongo::assembleResponse(mongo::OperationContext*, mongo::Message&amp;amp;, mongo::DbResponse&amp;amp;, mongo::HostAndPort const&amp;amp;) ()&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; [2016/09/06 22:35:19.728] #13 0x00007fc4adf2a97d in mongo::ServiceEntryPointMongod::_sessionLoop(mongo::transport::Session*) ()&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; [2016/09/06 22:35:19.728] #14 0x00007fc4adf2b2e0 in std::_Function_handler&amp;lt;void (mongo::transport::Session*), mongo::ServiceEntryPointMongod::startSession(mongo::transport::Session&amp;amp;&amp;amp;)::{lambda(mongo::transport::Session*)#1}&amp;gt;::_M_invoke(std::_Any_data const&amp;amp;, mongo::transport::Session*&amp;amp;&amp;amp;) ()&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; [2016/09/06 22:35:19.728] #15 0x00007fc4aebf5b7b in mongo::(anonymous namespace)::runFunc(void*) ()&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; [2016/09/06 22:35:19.728] #16 0x00007fc4aac1aaa1 in start_thread () from /lib64/libpthread.so.0&lt;/span&gt;&lt;/pre&gt;
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					&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; [2016/09/06 22:35:19.728] #17 0x00007fc4aa967aad in clone () from /lib64/libc.so.6&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;T2:&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;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2016/09/06 22:35:19.640] Thread 1106 (Thread 0x7fc48f7c2700 (LWP 4482)):&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; [2016/09/06 22:35:19.640] #0  0x00007fc4aac1b2fd in pthread_join () from /lib64/libpthread.so.0&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; [2016/09/06 22:35:19.640] #1  0x00007fc4af6eff57 in std::thread::join() ()&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; [2016/09/06 22:35:19.640] #2  0x00007fc4ae6adc9f in mongo::repl::NoopWriter::stopWritingPeriodicNoops() ()&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; [2016/09/06 22:35:19.640] #3  0x00007fc4ae71bff2 in mongo::repl::ReplicationCoordinatorImpl::_performPostMemberStateUpdateAction(mongo::repl::ReplicationCoordinatorImpl::PostMemberStateUpdateAction) ()&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; [2016/09/06 22:35:19.640] #4  0x00007fc4ae730e1e in mongo::repl::ReplicationCoordinatorImpl::_stepDownFinish(mongo::executor::TaskExecutor::CallbackArgs const&amp;amp;, mongo::executor::TaskExecutor::EventHandle const&amp;amp;) ()&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; [2016/09/06 22:35:19.641] #5  0x00007fc4ae73b480 in mongo::repl::ReplicationExecutor::_doOperation(mongo::OperationContext*, mongo::Status const&amp;amp;, mongo::executor::TaskExecutor::CallbackHandle const&amp;amp;, std::__cxx11::list&amp;lt;mongo::repl::ReplicationExecutor::WorkItem, std::allocator&amp;lt;mongo::repl::ReplicationExecutor::WorkItem&amp;gt; &amp;gt;*, std::mutex*) ()&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2016/09/06 22:35:19.641] #6  0x00007fc4ae739cf9 in mongo::repl::(anonymous namespace)::callNoExcept(std::function&amp;lt;void ()&amp;gt; const&amp;amp;) ()&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2016/09/06 22:35:19.641] #7  0x00007fc4ae741770 in std::_Function_handler&amp;lt;mongo::repl::TaskRunner::NextAction (mongo::OperationContext*, mongo::Status const&amp;amp;), mongo::repl::ReplicationExecutor::scheduleWorkWithGlobalExclusiveLock(std::function&amp;lt;void (mongo::executor::TaskExecutor::CallbackArgs const&amp;amp;)&amp;gt; const&amp;amp;)::{lambda(mongo::OperationContext*, mongo::Status const&amp;amp;)#1}&amp;gt;::_M_invoke(std::_Any_data const&amp;amp;, mongo::OperationContext*&amp;amp;&amp;amp;, mongo::Status const&amp;amp;) ()&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2016/09/06 22:35:19.641] #8  0x00007fc4ae673726 in std::_Function_handler&amp;lt;mongo::repl::TaskRunner::NextAction (mongo::OperationContext*, mongo::Status const&amp;amp;), mongo::repl::DatabaseTask::makeGlobalExclusiveLockTask(std::function&amp;lt;mongo::repl::TaskRunner::NextAction (mongo::OperationContext*, mongo::Status const&amp;amp;)&amp;gt; const&amp;amp;)::{lambda(mongo::OperationContext*, mongo::Status const&amp;amp;)#1}&amp;gt;::_M_invoke(std::_Any_data const&amp;amp;, mongo::OperationContext*&amp;amp;&amp;amp;, mongo::Status const&amp;amp;) ()&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2016/09/06 22:35:19.641] #9  0x00007fc4ae7903a7 in mongo::repl::(anonymous namespace)::runSingleTask(std::function&amp;lt;mongo::repl::TaskRunner::NextAction (mongo::OperationContext*, mongo::Status const&amp;amp;)&amp;gt; const&amp;amp;, mongo::OperationContext*, mongo::Status const&amp;amp;) [clone .constprop.70] ()&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2016/09/06 22:35:19.642] #10 0x00007fc4ae79167f in mongo::repl::TaskRunner::_runTasks() ()&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2016/09/06 22:35:19.642] #11 0x00007fc4aec06825 in mongo::ThreadPool::_doOneTask(std::unique_lock&amp;lt;std::mutex&amp;gt;*) ()&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2016/09/06 22:35:19.642] #12 0x00007fc4aec07350 in mongo::ThreadPool::_consumeTasks() ()&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2016/09/06 22:35:19.642] #13 0x00007fc4aec07ef9 in mongo::ThreadPool::_workerThreadBody(mongo::ThreadPool*, std::__cxx11::basic_string&amp;lt;char, std::char_traits&amp;lt;char&amp;gt;, std::allocator&amp;lt;char&amp;gt; &amp;gt; const&amp;amp;) ()&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2016/09/06 22:35:19.642] #14 0x00007fc4af6f0010 in execute_native_thread_routine ()&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2016/09/06 22:35:19.642] #15 0x00007fc4aac1aaa1 in start_thread () from /lib64/libpthread.so.0&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   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; [2016/09/06 22:35:19.643] #16 0x00007fc4aa967aad in clone () from /lib64/libc.so.6&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;T3:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2016/09/06 22:35:19.713] Thread 1055 (Thread 0x7fc46ee74700 (LWP 5672)):&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2016/09/06 22:35:19.713] #0  0x00007fc4aac21334 in __lll_lock_wait () from /lib64/libpthread.so.0&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2016/09/06 22:35:19.713] #1  0x00007fc4aac1c5d8 in _L_lock_854 () from /lib64/libpthread.so.0&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2016/09/06 22:35:19.713] #2  0x00007fc4aac1c4a7 in pthread_mutex_lock () from /lib64/libpthread.so.0&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2016/09/06 22:35:19.713] #3  0x00007fc4ae84dfb3 in mongo::ServiceContext::ClientDeleter::operator()(mongo::Client*) const ()&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2016/09/06 22:35:19.713] #4  0x00007fc4ae0c7771 in boost::thread_specific_ptr&amp;lt;std::unique_ptr&amp;lt;mongo::Client, mongo::ServiceContext::ClientDeleter&amp;gt; &amp;gt;::delete_data::operator()(void*) ()&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2016/09/06 22:35:19.713] #5  0x00007fc4aee345c7 in tls_destructor ()&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2016/09/06 22:35:19.714] #6  0x00007fc4aac1ab39 in start_thread () from /lib64/libpthread.so.0&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   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; [2016/09/06 22:35:19.714] #7  0x00007fc4aa967aad in clone () from /lib64/libc.so.6&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="314738">SERVER-26003</key>
            <summary>Deadlock at replication stepdown involving the NoopWriter</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="siyuan.zhou@mongodb.com">Siyuan Zhou</assignee>
                                    <reporter username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                    </labels>
                <created>Wed, 7 Sep 2016 18:11:59 +0000</created>
                <updated>Wed, 25 Jan 2017 21:58:02 +0000</updated>
                            <resolved>Mon, 12 Sep 2016 19:31:12 +0000</resolved>
                                    <version>3.3.12</version>
                                    <fixVersion>3.3.14</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="1382349" author="xgen-internal-githook" created="Mon, 12 Sep 2016 19:30:55 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;visualzhou&apos;, u&apos;name&apos;: u&apos;Siyuan Zhou&apos;, u&apos;email&apos;: u&apos;siyuan.zhou@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-26003&quot; title=&quot;Deadlock at replication stepdown involving the NoopWriter&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-26003&quot;&gt;&lt;del&gt;SERVER-26003&lt;/del&gt;&lt;/a&gt; Protect stepdown waiters with _mutex rather than _topoMutex.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ec61ddf3e46fdc4c5c960968d3766195cd3a2c34&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ec61ddf3e46fdc4c5c960968d3766195cd3a2c34&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1379055" author="siyuan.zhou@10gen.com" created="Wed, 7 Sep 2016 23:03:50 +0000"  >&lt;p&gt;I propose protecting &lt;tt&gt;_stepDownWaiters&lt;/tt&gt; with &lt;tt&gt;replCoord&lt;/tt&gt;&apos;s &lt;tt&gt;_mutex&lt;/tt&gt; instead of &lt;tt&gt;_topoMutex&lt;/tt&gt;, so that &lt;tt&gt;ReplicationCoordinatorImpl::interrupt()&lt;/tt&gt; in T1 doesn&apos;t require _topoMutex. &lt;tt&gt;_performPostMemberStateUpdateAction()&lt;/tt&gt; in T2 doesn&apos;t need _mutex, so the loop of deadlock is broken.&lt;/p&gt;</comment>
                    </comments>
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