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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-1702] slave w/ slavedelay may apply old ops when master is down</title>
                <link>https://jira.mongodb.org/browse/SERVER-1702</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We could potentially have the following scenario:&lt;/p&gt;

&lt;p&gt;1) A slave is specified with a slave delay (say an hour or so)&lt;br/&gt;
2) Bad data is written to master&lt;br/&gt;
3) The operator takes down the master, intending to prevent the bad data from being written to the slave&lt;br/&gt;
4) After the hour has elapsed, the slave applies the last batch of delayed operations it had read from the master before the master was taken offline&lt;/p&gt;

&lt;p&gt;Do we want to do anything about this, or is it the operator&apos;s job to make sure the slave node is restarted in a scenario like this?&lt;/p&gt;</description>
                <environment></environment>
        <key id="12956">SERVER-1702</key>
            <summary>slave w/ slavedelay may apply old ops when master is down</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="aaron">Aaron Staple</reporter>
                        <labels>
                    </labels>
                <created>Mon, 30 Aug 2010 22:48:40 +0000</created>
                <updated>Tue, 19 Mar 2013 20:18:34 +0000</updated>
                            <resolved>Fri, 8 Mar 2013 20:08:52 +0000</resolved>
                                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="284643" author="milkie" created="Fri, 8 Mar 2013 20:08:52 +0000"  >&lt;p&gt;replica set slave delay is handled in a better way&lt;/p&gt;</comment>
                            <comment id="17600" author="aaron" created="Tue, 31 Aug 2010 01:55:20 +0000"  >&lt;p&gt;I was asked to implement slave delay by having the thread which applies operations sleep when it sees an op that&apos;s too fresh to be applied.  But this implies that a fresh op must be read by the slave in order for the slave to sleep, and currently the slave isn&apos;t resetting its connection to master in this situation.  So there are going to be one or more ops that are too fresh sitting on the slave - currently they will be applied after an hour regardless of whether or not the master is still up at that time.&lt;/p&gt;</comment>
                            <comment id="17597" author="eliot" created="Tue, 31 Aug 2010 01:46:08 +0000"  >&lt;p&gt;Isn&apos;t the oplog xfer delayed an hour?&lt;br/&gt;
So I don&apos;t think this is an issue unless I&apos;m missing something??&lt;/p&gt;

&lt;p&gt;Assign back to me if I am  missing something.&lt;/p&gt;</comment>
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