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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-64050] set TemporarilyUnavailableException::kRetryBackoff higher</title>
                <link>https://jira.mongodb.org/browse/SERVER-64050</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, TemporarilyUnavailableException::kRetryBackoff is set to 100 milliseconds, which doesn&apos;t seem like enough delay to give the retry of the operation a good chance to succeed.  I recommend we change this value to at least 2 seconds, and keep the number of retries hardcoded at &quot;3&quot;.  Thus, with linear increasing of the delay for each retry, prior to the last retry the delay will be 6 seconds, which doesn&apos;t seem unreasonable for an overloaded system.  Control of this delay server-side is important since returning a retriable error immediately with no retrying will typically result in immediate retry by the drivers with no delay.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1991530">SERVER-64050</key>
            <summary>set TemporarilyUnavailableException::kRetryBackoff higher</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="louis.williams@mongodb.com">Louis Williams</assignee>
                                    <reporter username="milkie@mongodb.com">Eric Milkie</reporter>
                        <labels>
                    </labels>
                <created>Mon, 28 Feb 2022 19:04:57 +0000</created>
                <updated>Sun, 29 Oct 2023 21:41:53 +0000</updated>
                            <resolved>Fri, 11 Mar 2022 10:58:47 +0000</resolved>
                                                    <fixVersion>6.0.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="4406047" author="xgen-internal-githook" created="Fri, 11 Mar 2022 10:33:23 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Louis Williams&apos;, &apos;email&apos;: &apos;louis.williams@mongodb.com&apos;, &apos;username&apos;: &apos;louiswilliams&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-64050&quot; title=&quot;set TemporarilyUnavailableException::kRetryBackoff higher&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-64050&quot;&gt;&lt;del&gt;SERVER-64050&lt;/del&gt;&lt;/a&gt; Increase TemporarilyUnavailable retry backoff and enable by default&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;Alters the base backoff period to 1 second and max retries to 10.&lt;/li&gt;
	&lt;li&gt;Removes the loadShedding server parameter and enables internal&lt;br/&gt;
  TemporarilyUnavailable retry behavior by default.&lt;/li&gt;
	&lt;li&gt;TemporarilyUnavailable errors are converted to WriteConflicts when returned&lt;br/&gt;
  inside multi-document transactions.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8e616cc3ef082ec67a04393ca3435d4b81f44da4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8e616cc3ef082ec67a04393ca3435d4b81f44da4&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;
</comment>
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                            <issuelinktype id="10320">
                    <name>Documented</name>
                                                                <inwardlinks description="is documented by">
                                        <issuelink>
            <issuekey id="1999332">DOCS-15168</issuekey>
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                    <name>Related</name>
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            <issuekey id="1903239">SERVER-60839</issuekey>
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                            <customfieldvalue>MongoDB may, in rare circumstances, return a new TemporarilyUnvailable error when a write operation is excessively rolled-back in the storage engine due to cache pressure. The operation may be at fault for writing too much data, or it may be a victim. That information is not exposed. However, if this error is returned, it is very likely that the operation was the cause of the problem, rather than a victim.&lt;br/&gt;
&lt;br/&gt;
Previously, this type of error was retried indefinitely inside MongoDB. Now, MongoDB will retry an operation internally at most 10 times, backing off for &lt;br/&gt;
1 second, with a linearly-increasing backoff, in total up to 55 seconds. After this point, the error will be returned to the user. This can be tuned with the setParameters &amp;quot;temporarilyUnavailableMaxRetries&amp;quot; and &amp;quot;temporarilyUnavailableBackoffBaseMs&amp;quot;.&lt;br/&gt;
&lt;br/&gt;
If an operation receives a TemporarilyUnavailable error internally, a &amp;quot;temporarilyUnavailableErrors&amp;quot; counter will be displayed in the slow query logs and in FTDC.&lt;br/&gt;
&lt;br/&gt;
This does not apply to multi-document transactions, which will continue to return a WriteConflict in this scenario without retrying internally.</customfieldvalue>

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