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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-17019] HA setup doesn&apos;t work if member totally and quickly disappears</title>
                <link>https://jira.mongodb.org/browse/SERVER-17019</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We have a problem with our replica set. It&apos;s running on three virtual servers and if any of the mongod&apos;s goes down, it normally continues working with the rest. However, if any of the servers totally disappears, i.e. won&apos;t respond to network traffic at all (if down, or block all outgoing traffic via firewall, or poweroff the server suddenly), all queries to the replica set take 15 seconds extra. Judging from the network traffic, it&apos;s due to TCP retransmits.&lt;/p&gt;

&lt;p&gt;This 15 second extra time for every query makes our load balancer think all nodes are down and it shuts down traffic to the whole setup.&lt;/p&gt;

&lt;p&gt;Since using console mongo the other replica set members works fine, we originally posted this as a bug in the node.js driver (&lt;a href=&quot;https://jira.mongodb.org/browse/NODE-350&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/NODE-350&lt;/a&gt;), but later tried with the PHP driver and were able to reproduce a similar (although not identical) behaviour.&lt;/p&gt;

&lt;p&gt;We also reproduced this problem in our secondary setup in another data center, so this shouldn&apos;t be data center specific. Both might be running the same virtualization platform, though, we haven&apos;t looked into that yet.&lt;/p&gt;

&lt;p&gt;Any ideas how to go forward with this?&lt;/p&gt;</description>
                <environment></environment>
        <key id="180330">SERVER-17019</key>
            <summary>HA setup doesn&apos;t work if member totally and quickly disappears</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</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="4">Incomplete</resolution>
                                        <assignee username="schwerin@mongodb.com">Andy Schwerin</assignee>
                                    <reporter username="kvirta">Kalle Varisvirta</reporter>
                        <labels>
                    </labels>
                <created>Fri, 23 Jan 2015 08:04:22 +0000</created>
                <updated>Wed, 25 Mar 2015 19:51:14 +0000</updated>
                            <resolved>Wed, 25 Mar 2015 19:51:14 +0000</resolved>
                                    <version>2.6.6</version>
                                                    <component>Replication</component>
                                        <votes>1</votes>
                                    <watches>10</watches>
                                                                                                                <comments>
                            <comment id="811733" author="schwerin" created="Fri, 23 Jan 2015 15:36:04 +0000"  >&lt;p&gt;Have you tried the experiment &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=ck&quot; class=&quot;user-hover&quot; rel=&quot;ck&quot;&gt;ck&lt;/a&gt; suggested on &lt;a href=&quot;https://jira.mongodb.org/browse/NODE-350&quot; title=&quot;15 sec db.open delay when one replica set member eth down&quot; class=&quot;issue-link&quot; data-issue-key=&quot;NODE-350&quot;&gt;&lt;del&gt;NODE-350&lt;/del&gt;&lt;/a&gt;?&lt;/p&gt;</comment>
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