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    <title>MongoDB Jira</title>
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    <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-3024] distributed lock will not unlock self</title>
                <link>https://jira.mongodb.org/browse/SERVER-3024</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If a distributed lock fails to unlock for some reason ( server connectivity, for example ), the process continues to ping for the lock (so it can&apos;t be forced).  see CS-541&lt;/p&gt;

&lt;p&gt;Assuming mongos is still in a sane state, it should be possible to reacquire distributed locks of the same process and name for singleton threads like the balancer.&lt;/p&gt;</description>
                <environment></environment>
        <key id="16503">SERVER-3024</key>
            <summary>distributed lock will not unlock self</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="greg_10gen">Greg Studer</assignee>
                                    <reporter username="greg_10gen">Greg Studer</reporter>
                        <labels>
                    </labels>
                <created>Fri, 29 Apr 2011 21:59:21 +0000</created>
                <updated>Tue, 12 Jul 2016 00:19:06 +0000</updated>
                            <resolved>Wed, 4 May 2011 21:35:13 +0000</resolved>
                                    <version>1.9.0</version>
                                    <fixVersion>1.9.1</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="31053" author="auto" created="Wed, 4 May 2011 21:35:08 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;gregstuder&apos;, u&apos;name&apos;: u&apos;gregs&apos;, u&apos;email&apos;: u&apos;greg@10gen.com&apos;}
&lt;p&gt;Message: Re-entrant distributed locks with ping unlock retries &amp;#8211; &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-3024&quot; title=&quot;distributed lock will not unlock self&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-3024&quot;&gt;&lt;del&gt;SERVER-3024&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Retries unlock when process is still up but config server has gone down,&lt;br/&gt;
in case of errors during locking and unlocking.  Also allows testing&lt;br/&gt;
of locks already held.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ad01e102a8b766c8a2fe0cfc09f3fccd5e3b53c5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ad01e102a8b766c8a2fe0cfc09f3fccd5e3b53c5&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="30995" author="greg_10gen" created="Wed, 4 May 2011 17:40:58 +0000"  >&lt;p&gt;Think the real solution here is to make the lock poll on failure to unlock, using the same thread that establishes the legitimacy of the lock.  Otherwise single processes which run very infrequently may still block other processes if they fail to unlock.  Have a fix which does this as well.  Testing for current process is still needed for &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-3039&quot; title=&quot;distributed lock needs to be checked periodically &quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-3039&quot;&gt;&lt;del&gt;SERVER-3039&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
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