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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-16994] Handle WriteConflictException when writing oplog on secondaries</title>
                <link>https://jira.mongodb.org/browse/SERVER-16994</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description></description>
                <environment></environment>
        <key id="180162">SERVER-16994</key>
            <summary>Handle WriteConflictException when writing oplog on secondaries</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="milkie@mongodb.com">Eric Milkie</assignee>
                                    <reporter username="milkie@mongodb.com">Eric Milkie</reporter>
                        <labels>
                    </labels>
                <created>Thu, 22 Jan 2015 15:52:56 +0000</created>
                <updated>Wed, 22 Jul 2015 12:44:32 +0000</updated>
                            <resolved>Thu, 22 Jan 2015 19:34:15 +0000</resolved>
                                                    <fixVersion>3.0.0-rc6</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="972055" author="wrichard" created="Wed, 22 Jul 2015 12:44:32 +0000"  >&lt;p&gt;Thanks, I just opened it as &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19518&quot; title=&quot;mongod crashes with WriteConflictException when writing oplog on secondaries&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19518&quot;&gt;&lt;del&gt;SERVER-19518&lt;/del&gt;&lt;/a&gt;. I hadn&apos;t noticed the backport for 3.0.5, which probably does address the problem.&lt;/p&gt;</comment>
                            <comment id="971697" author="scotthernandez" created="Wed, 22 Jul 2015 01:18:13 +0000"  >&lt;p&gt;Will, please open a new issue and specify the server version and other important details about your system/deployment, including logs.&lt;/p&gt;

&lt;p&gt;Also, that commit is fairly old and what you describe is no longer the flow: &lt;a href=&quot;https://github.com/mongodb/mongo/blob/v3.0/src/mongo/db/repl/oplog.cpp#L387&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/v3.0/src/mongo/db/repl/oplog.cpp#L387&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;I believe what you described is no longer possible since we back-ported changes into the 3.0 branch &amp;#8211; see &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-17689&quot; title=&quot;Fatal assertion during replication, and/or initial sync&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-17689&quot;&gt;&lt;del&gt;SERVER-17689&lt;/del&gt;&lt;/a&gt;, which soon will have a slightly better title/description, and is in the upcoming 3.0.5 minor patch release.&lt;/p&gt;</comment>
                            <comment id="971568" author="wrichard" created="Tue, 21 Jul 2015 22:15:07 +0000"  >&lt;p&gt;There didn&apos;t seem to be any other relevant info in the server logs. I&apos;ll try to get more verbose logs and open a new ticket, but the error is quite difficult to reproduce.&lt;/p&gt;

&lt;p&gt;In the meantime, could someone take a quick look at this commit? It seems to me that if ops has more than one item, lastOptime can be updated before the WriteConflictException is thrown. The second time through the while loop, lastOptime will have a value higher than the first element of ops, triggering the fassertFailed.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Will&lt;/p&gt;</comment>
                            <comment id="971470" author="ramon.fernandez" created="Tue, 21 Jul 2015 20:54:03 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=wrichard&quot; class=&quot;user-hover&quot; rel=&quot;wrichard&quot;&gt;wrichard&lt;/a&gt;, can you please open a new ticket and provide full server logs as well as activity details when you had the crash?&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Ram&#243;n.&lt;/p&gt;</comment>
                            <comment id="971200" author="wrichard" created="Tue, 21 Jul 2015 17:13:53 +0000"  >&lt;p&gt;I think this may not be working. I just had a secondary crash with &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;2015-07-21T08:40:46.434-0400 I REPL     [rsSync] WriteConflictException while writing oplog, retrying&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;2015-07-21T08:40:46.475-0400 F REPL     [rsSync] replication oplog stream went back in time. previous timestamp: 55ae3dd4:28 newest timestamp: 55ae3d60:c. &lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
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&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;perhaps the try/catch should be within the ops for loop.&lt;/p&gt;</comment>
                            <comment id="810923" author="xgen-internal-githook" created="Thu, 22 Jan 2015 19:34:41 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;milkie&apos;, u&apos;name&apos;: u&apos;Eric Milkie&apos;, u&apos;email&apos;: u&apos;milkie@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16994&quot; title=&quot;Handle WriteConflictException when writing oplog on secondaries&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16994&quot;&gt;&lt;del&gt;SERVER-16994&lt;/del&gt;&lt;/a&gt; handle WriteConflictException when writing oplog on secondaries&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/816defcefba70ffe815639fa6bb157b69ef034ad&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/816defcefba70ffe815639fa6bb157b69ef034ad&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="191294">SERVER-17689</issuekey>
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