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    <title>MongoDB Jira</title>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-1504] Possibly deadlock reached while performing simultaneous queries and mapreduces</title>
                <link>https://jira.mongodb.org/browse/SERVER-1504</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;While performing simultaneous activities I was able to put a mongod 1.5.6 instance into a supposed deadlock. The server still accepts connections but will not perform further queries or mapreduces. I&apos;ve included a currentOp output and a portion of stdout and stderr from mongod. Samples of the types of mapreduces and queries used can be gleaned from this output. The server was under heavy use with many processes/hosts concurrently querying and inserting and performing mapreduces. &lt;/p&gt;

&lt;p&gt;The mongod and the system is idle. I&apos;ve tried interrupting the server with a response of &quot;got kill or ctrl c or hup signal 2 (Interrupt), will terminate after current cmd ends&quot;. I&apos;ve issued db.killOp requests which do not take effect.&lt;/p&gt;</description>
                <environment>CentOS Linux 2.6.18-194.8.1.el5 SMP x86_64</environment>
        <key id="12580">SERVER-1504</key>
            <summary>Possibly deadlock reached while performing simultaneous queries and mapreduces</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="mathias@mongodb.com">Mathias Stearn</assignee>
                                    <reporter username="kkurzweil">Ken Kurzweil</reporter>
                        <labels>
                    </labels>
                <created>Wed, 28 Jul 2010 16:16:36 +0000</created>
                <updated>Tue, 12 Jul 2016 00:17:21 +0000</updated>
                            <resolved>Wed, 28 Jul 2010 18:13:33 +0000</resolved>
                                    <version>1.5.6</version>
                                    <fixVersion>1.5.7</fixVersion>
                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="16260" author="redbeard0531" created="Wed, 28 Jul 2010 18:13:33 +0000"  >&lt;p&gt;fixed in git master&lt;/p&gt;</comment>
                            <comment id="16255" author="kkurzweil" created="Wed, 28 Jul 2010 17:25:10 +0000"  >&lt;p&gt;Not using db.eval() and if it helps all interaction is performed by processes using pymongo 1.7.&lt;/p&gt;</comment>
                            <comment id="16252" author="redbeard0531" created="Wed, 28 Jul 2010 16:27:29 +0000"  >&lt;p&gt;Are you calling map reduce from within a db.eval()?&lt;/p&gt;</comment>
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                            <attachment id="10314" name="currentOp_output.txt" size="8576" author="kkurzweil" created="Wed, 28 Jul 2010 16:16:36 +0000"/>
                            <attachment id="10315" name="mongdb_stdout_stderr.txt" size="12283" author="kkurzweil" created="Wed, 28 Jul 2010 16:16:36 +0000"/>
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