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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-6793] 2.2.0-rc1 stops responding to other requests with high-fault reads?</title>
                <link>https://jira.mongodb.org/browse/SERVER-6793</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I upgraded one server in a 6-server 2.0.1 replicaSet to test MongoDB 2.2.0-rc1. I wanted to test read and locking performance so I switched to a db with a very large collection that easily exceeds RAM. I then ran a query that I knew would match no records: db.collection.find(&lt;/p&gt;
{x: 1}
&lt;p&gt;). This caused the mongostat I was running in another window to stop responding, I could connect with another shell but &quot;show dbs&quot; would not return until the above query completed. Also, hitting Ctrl-C on the find() query caused &quot;Fri Aug 17 19:07:19 Assertion: 13111:field not found, expected type 2&quot; in the shell. I was unable to manually kill the find() operation.&lt;/p&gt;

&lt;p&gt;I also tried this a second time so I could be sure that as much of the database that could be hot in memory was available.&lt;/p&gt;</description>
                <environment>MongoDB 2.0.1 replicaSet with one host &amp;quot;upgraded&amp;quot; (ran mongod from 2.2.0-rc1 linux 64bit download package) to 2.2.0-rc1 for testing. 100GB RAM, RAID 10 spinning disk, CentOS 5.5, Linux 2.6.18-194, Xeon &lt;a href=&apos;mailto:X5675@3.07Ghz&apos;&gt;X5675@3.07Ghz&lt;/a&gt;, NUMA disabled. Existing 217GB dataset from 2.0.1 with 51GB indexes/</environment>
        <key id="47478">SERVER-6793</key>
            <summary>2.2.0-rc1 stops responding to other requests with high-fault reads?</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="eliot">Eliot Horowitz</assignee>
                                    <reporter username="geoffeg">Geoffrey Gallaway</reporter>
                        <labels>
                    </labels>
                <created>Fri, 17 Aug 2012 19:10:28 +0000</created>
                <updated>Mon, 11 Jul 2016 17:58:26 +0000</updated>
                            <resolved>Mon, 20 Aug 2012 20:52:11 +0000</resolved>
                                    <version>2.2.0-rc1</version>
                                    <fixVersion>2.2.0-rc2</fixVersion>
                    <fixVersion>2.3.0</fixVersion>
                                    <component>Performance</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="155063" author="auto" created="Mon, 20 Aug 2012 20:40:10 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-08-20T13:43:38-07:00&apos;, u&apos;email&apos;: u&apos;eliot@10gen.com&apos;, u&apos;name&apos;: u&apos;Eliot Horowitz&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6793&quot; title=&quot;2.2.0-rc1 stops responding to other requests with high-fault reads?&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6793&quot;&gt;&lt;del&gt;SERVER-6793&lt;/del&gt;&lt;/a&gt; - parallel writer batch lock needs to be involved in yield/tempRelease&lt;br/&gt;
Branch: v2.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b887909f9281c99c69d733153c3aa6aea6624899&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b887909f9281c99c69d733153c3aa6aea6624899&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="155062" author="auto" created="Mon, 20 Aug 2012 20:39:48 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-08-20T13:43:38-07:00&apos;, u&apos;email&apos;: u&apos;eliot@10gen.com&apos;, u&apos;name&apos;: u&apos;Eliot Horowitz&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6793&quot; title=&quot;2.2.0-rc1 stops responding to other requests with high-fault reads?&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6793&quot;&gt;&lt;del&gt;SERVER-6793&lt;/del&gt;&lt;/a&gt; - parallel writer batch lock needs to be involved in yield/tempRelease&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/cab43568bdd66980bc1aefdbf538cc22c99e6af6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/cab43568bdd66980bc1aefdbf538cc22c99e6af6&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="154720" author="geoffeg" created="Sun, 19 Aug 2012 14:36:41 +0000"  >&lt;p&gt;Yes, after testing with 2.2.0-rc1, I reverted back to 2.0.1 and ran the same query under the same circumstances. Under 2.0.1, mongostat continues to display data during the query and I can open another mongo shell and do other queries.&lt;/p&gt;</comment>
                            <comment id="154716" author="dwight_10gen" created="Sun, 19 Aug 2012 13:46:49 +0000"  >&lt;p&gt;does that work with v2.0? (i assume so trying to eliminate variables)&lt;/p&gt;</comment>
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