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    <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-4425] Mongodump occasionally fails to dump database with --oplog</title>
                <link>https://jira.mongodb.org/browse/SERVER-4425</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Mongodump command:&lt;br/&gt;
&quot;/usr/bin/mongodump&quot; -o &quot;/path/to/dump&quot; -h target.host.name --oplog&lt;br/&gt;
assertion: 13106 nextSafe(): &lt;/p&gt;
{ $err: &quot;capped cursor overrun during query: local.oplog.rs&quot;, code: 13338 }

&lt;p&gt;Server log extract:&lt;br/&gt;
Sun Dec  4 05:09:56 &lt;span class=&quot;error&quot;&gt;&amp;#91;conn16022&amp;#93;&lt;/span&gt; Assertion: 13338:capped cursor overrun during query: local.oplog.rs&lt;br/&gt;
Sun Dec  4 05:09:56 &lt;span class=&quot;error&quot;&gt;&amp;#91;conn16022&amp;#93;&lt;/span&gt; assertion 13338 capped cursor overrun during query: local.oplog.rs ns:local.oplog.rs query:{ ts: &lt;/p&gt;
{ $gt: Timestamp 1322960989000|38 }
&lt;p&gt; }&lt;br/&gt;
Sun Dec  4 05:09:56 &lt;span class=&quot;error&quot;&gt;&amp;#91;conn16022&amp;#93;&lt;/span&gt; query local.oplog.rs exception: capped cursor overrun during query: local.oplog.rs code:13338 reslen:96 468ms&lt;/p&gt;</description>
                <environment></environment>
        <key id="25979">SERVER-4425</key>
            <summary>Mongodump occasionally fails to dump database with --oplog</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="5">Cannot Reproduce</resolution>
                                        <assignee username="milkie@mongodb.com">Eric Milkie</assignee>
                                    <reporter username="onyxmaster">Aristarkh Zagorodnikov</reporter>
                        <labels>
                            <label>dump</label>
                    </labels>
                <created>Sun, 4 Dec 2011 20:23:45 +0000</created>
                <updated>Fri, 30 Mar 2012 14:37:00 +0000</updated>
                            <resolved>Thu, 22 Dec 2011 14:26:36 +0000</resolved>
                                    <version>2.0.1</version>
                                                    <component>Tools</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="75431" author="onyxmaster" created="Thu, 22 Dec 2011 15:20:37 +0000"  >&lt;p&gt;Good, I hope it won&apos;t show up anymore.&lt;/p&gt;</comment>
                            <comment id="75420" author="milkie" created="Thu, 22 Dec 2011 14:26:14 +0000"  >&lt;p&gt;I was unsuccessful in reproducing the behavior as well.  I did clean up some threading and uninitialized variables in the course of running mongodump, so it&apos;s possible that I&apos;ve fixed the issue; these changes will be released in v2.1.0.  &lt;br/&gt;
I&apos;m going to resolve this for now, but please reopen if it happens again.  Thanks for taking the time to file this issue.&lt;/p&gt;</comment>
                            <comment id="75356" author="onyxmaster" created="Thu, 22 Dec 2011 05:13:57 +0000"  >&lt;p&gt;Yes, we had this failure only once, repeating backup solved the problem and we never had it again despite using the same command in the same environment on a daily basis.&lt;/p&gt;</comment>
                            <comment id="75211" author="milkie" created="Wed, 21 Dec 2011 21:17:29 +0000"  >&lt;p&gt;When you run mongodump, how often does the failure occur?  I presume when you retry immediately with the same command, it succeeds?&lt;/p&gt;</comment>
                            <comment id="72223" author="onyxmaster" created="Sun, 11 Dec 2011 07:49:58 +0000"  >&lt;p&gt;Unfortunately our case is different. The backup takes about three minutes to complete (total uncompressed BSON size is ~1.8GiB), and the oplog contains enough space to store about 20 hours of writes in the worst case (checked each server using &lt;a href=&quot;http://target.host.name:28017/_replSetOplog?_id=1&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://target.host.name:28017/_replSetOplog?_id=1&lt;/a&gt; which shows at least 21-hour difference between oplog top and bottom records).&lt;/p&gt;</comment>
                            <comment id="72216" author="eliot" created="Sun, 11 Dec 2011 05:53:26 +0000"  >&lt;p&gt;That means the dump is taking longer than you have data in the oplog for.&lt;br/&gt;
You&apos;ll need to increase the size of the oplog to use this.&lt;/p&gt;</comment>
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