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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-50623] make catchup_takeover_one_high_priority.js more robust to slow machines</title>
                <link>https://jira.mongodb.org/browse/SERVER-50623</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;catchup_takeover_one_high_priority.js will run into the following scenario when running on a slow machine:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;3 node replset (node0 and node1 are default priority and node2 has priority 2)&lt;/li&gt;
	&lt;li&gt;wait for node2 to be primary and isolate it (so it can&apos;t do a priority takeover)&lt;/li&gt;
	&lt;li&gt;step up node0&lt;/li&gt;
	&lt;li&gt;stop repl on node1 and write something on node0 so it&apos;s ahead of node1&lt;/li&gt;
	&lt;li&gt;step up node1 (which is lagged), it&apos;ll transition to primary but can&apos;t accept writes&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;here&apos;s where things get weird&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;the test expects node0 to do a catchup takeover because it&apos;s ahead&lt;/li&gt;
	&lt;li&gt;node0 wins it&apos;s dry run election and runs for a real election&lt;/li&gt;
	&lt;li&gt;node0 increments the term, so node1 steps down&lt;/li&gt;
	&lt;li&gt;due to slow machine issues, node0 does not send out a vote request within the election timeout&lt;/li&gt;
	&lt;li&gt;node1 steps up again because of the default election timeout&lt;/li&gt;
	&lt;li&gt;At this point the test&apos;s assert.soon fails bc node0 isn&apos;t primary like we expect&lt;/li&gt;
	&lt;li&gt;node0 eventually does another catchup takeover&lt;/li&gt;
	&lt;li&gt;succeeds this time, but it&apos;s too late because the test failed&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Since this test just needs node0 to eventually become primary, we should increase the waitForState timeout &lt;a href=&quot;https://github.com/mongodb/mongo/blob/64fcdabe8c7cc38188f31fd606379f935c94555a/jstests/replsets/catchup_takeover_one_high_priority.js#L86&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;. I would suggest 10 minutes instead of 1 minute. If this call times out after 10 minutes, it would be more indicative of a hang instead of a slow machine issue. &lt;/p&gt;

&lt;p&gt;We should consider doing the same change for catchup_takeover_two_nodes_ahead.js, which is also brittle when dealing with slow machines.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1456141">SERVER-50623</key>
            <summary>make catchup_takeover_one_high_priority.js more robust to slow machines</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="13201">Fixed</resolution>
                                        <assignee username="pavithra.vetriselvan@mongodb.com">Pavithra Vetriselvan</assignee>
                                    <reporter username="pavithra.vetriselvan@mongodb.com">Pavithra Vetriselvan</reporter>
                        <labels>
                    </labels>
                <created>Fri, 28 Aug 2020 19:23:38 +0000</created>
                <updated>Sun, 29 Oct 2023 22:03:50 +0000</updated>
                            <resolved>Fri, 4 Sep 2020 01:13:20 +0000</resolved>
                                                    <fixVersion>4.7.0</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3375772" author="xgen-internal-githook" created="Thu, 3 Sep 2020 22:12:45 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Pavi Vetriselvan&apos;, &apos;email&apos;: &apos;pavithra.vetriselvan@mongodb.com&apos;, &apos;username&apos;: &apos;pvselvan&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50623&quot; title=&quot;make catchup_takeover_one_high_priority.js more robust to slow machines&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50623&quot;&gt;&lt;del&gt;SERVER-50623&lt;/del&gt;&lt;/a&gt; make catchup_takeover_one_high_priority.js robust to slow machines&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8db9cd370aeefacb64c035c92b1ebd8bfb9e8ce5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8db9cd370aeefacb64c035c92b1ebd8bfb9e8ce5&lt;/a&gt;&lt;/p&gt;</comment>
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