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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>
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<item>
            <title>[SERVER-27900] Shutdown can get stuck behind any thread doing ShardRegistry::reload</title>
                <link>https://jira.mongodb.org/browse/SERVER-27900</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.5.2/src/mongo/s/client/shard_registry.cpp#L288&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;ShardRegistry::reload&lt;/tt&gt;&lt;/a&gt; call spawns a thread to refresh the list of shards from the config server. Because this thread runs with its own OperationContext, it ends up calling &lt;tt&gt;ReplicationCoordinatorImpl::waitUntilOpTimeForRead&lt;/tt&gt; without any timeout.&lt;/p&gt;

&lt;p&gt;Because of this, the shutdown sequence gets stuck since replication cannot make progress and update the opTime due to the server shutting down and the reload operation cannot proceed because it is waiting on the opTime to advance.&lt;/p&gt;

&lt;p&gt;The reason for this is that replication is the last entry in the shutdown sequence, so it never gets to be invoked in the scenario above and because of this &lt;tt&gt;waitUntilOpTimeForRead&lt;/tt&gt; becomes permanently stuck.&lt;/p&gt;</description>
                <environment></environment>
        <key id="351360">SERVER-27900</key>
            <summary>Shutdown can get stuck behind any thread doing ShardRegistry::reload</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="3">Duplicate</resolution>
                                        <assignee username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</assignee>
                                    <reporter username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                    </labels>
                <created>Thu, 2 Feb 2017 22:50:30 +0000</created>
                <updated>Wed, 5 Apr 2017 16:57:39 +0000</updated>
                            <resolved>Wed, 5 Apr 2017 16:57:39 +0000</resolved>
                                    <version>3.4.2</version>
                    <version>3.5.2</version>
                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="1541681" author="kaloian.manassiev" created="Wed, 5 Apr 2017 16:57:24 +0000"  >&lt;p&gt;Fixed as result of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-27691&quot; title=&quot;ServiceContext::setKillAllOperations should be replaced with an operation that interrupts running operations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-27691&quot;&gt;&lt;del&gt;SERVER-27691&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1536088" author="kaloian.manassiev" created="Wed, 29 Mar 2017 16:13:02 +0000"  >&lt;p&gt;One proposed solution involved masking the checkForInterrupt calls from actually checking anything if interrupt has been disallowed for the OperationContext. However, this has the side effect that it would also ignore operation deadlines for internal threads. If we were to ignore the operation deadlines, this would make explaining the semantics of the &quot;allowInterrupt&quot; setting even more complex.&lt;/p&gt;

&lt;p&gt;Instead we will go the full way and just mark all threads as interruptible by default in master and deal with the aftermath of potentially having to fix places which do not properly handle interruptions or exceptions being thrown.&lt;/p&gt;</comment>
                            <comment id="1491749" author="judah.schvimer" created="Fri, 3 Feb 2017 16:44:18 +0000"  >&lt;p&gt;The node does step down here. Do we expect the query to fail when the stepDown occurs and not keep blocking?&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;[js_test:commands_that_write_accept_wc_configRS] 2017-01-19T18:17:53.497+0000 c20266| 2017-01-19T18:17:53.497+0000 I CONTROL  [eventTerminate] shutdown event signaled, will terminate after current cmd ends&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;...&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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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;[js_test:commands_that_write_accept_wc_configRS] 2017-01-19T18:18:01.430+0000 c20266| 2017-01-19T18:18:01.430+0000 I REPL     [ReplicationExecutor] can&apos;t see a majority of the set, relinquishing primary&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[js_test:commands_that_write_accept_wc_configRS] 2017-01-19T18:18:01.430+0000 c20266| 2017-01-19T18:18:01.430+0000 I REPL     [ReplicationExecutor] Stepping down from primary in response to heartbeat&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;[js_test:commands_that_write_accept_wc_configRS] 2017-01-19T18:18:01.430+0000 c20266| 2017-01-19T18:18:01.430+0000 I REPL     [replExecDBWorker-0] transition to SECONDARY&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;[js_test:commands_that_write_accept_wc_configRS] 2017-01-19T18:18:01.430+0000 c20266| 2017-01-19T18:18:01.430+0000 I NETWORK  [replExecDBWorker-0] legacy transport layer closing all connections&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;[js_test:commands_that_write_accept_wc_configRS] 2017-01-19T18:18:01.430+0000 c20266| 2017-01-19T18:18:01.430+0000 I NETWORK  [replExecDBWorker-0] Skip closing connection for connection # 37&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;[js_test:commands_that_write_accept_wc_configRS] 2017-01-19T18:18:01.430+0000 c20266| 2017-01-19T18:18:01.430+0000 I NETWORK  [replExecDBWorker-0] Skip closing connection for connection # 21&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;[js_test:commands_that_write_accept_wc_configRS] 2017-01-19T18:18:01.430+0000 c20266| 2017-01-19T18:18:01.430+0000 I NETWORK  [replExecDBWorker-0] Skip closing connection for connection # 20&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
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&lt;p/&gt;</comment>
                            <comment id="1491347" author="kaloian.manassiev" created="Thu, 2 Feb 2017 22:53:53 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=benety.goh&quot; class=&quot;user-hover&quot; rel=&quot;benety.goh&quot;&gt;benety.goh&lt;/a&gt;, in the scenario above, even though &lt;tt&gt;ReplicationCoordinatorImpl::shutdown&lt;/tt&gt; was not called, if the remaining nodes did shutdown, this node should have stepped down and if the other nodes did not yet shutdown, the opTime should have advanced. Do you have any idea why neither happened?&lt;/p&gt;</comment>
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