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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-42388] Release the transaction lock resources and abort storage transaction for unprepared  transactions on failure to unstash the transaction resources to opCtx.</title>
                <link>https://jira.mongodb.org/browse/SERVER-42388</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, for any exception thrown after&#160;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/260a0ced5d3754f375fee6e220855e722c4b72b8/src/mongo/db/service_entry_point_common.cpp#L391&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;beginOrContinue&lt;/a&gt;&#160;and before&#160;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/260a0ced5d3754f375fee6e220855e722c4b72b8/src/mongo/db/service_entry_point_common.cpp#L409&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;unstashTransactionResources&lt;/a&gt;&#160;finishes, we don&apos;t abort the unprepared transactions implicitly. Instead we wait for it to abort eventually, either by the transaction reaper or any future requests with higher transaction number. To be noted, reaper would only abort the expired transactions and their life time of the transaction is controlled by an user defined server parameter &lt;a href=&quot;https://github.com/mongodb/mongo/blob/260a0ced5d3754f375fee6e220855e722c4b72b8/src/mongo/db/transaction_participant.idl#L48-L58&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;transactionLifetimeLimitSeconds&lt;/a&gt;. As a result, we are holding the transaction lock and storage resources for an unbounded period of time that would make other DDL/CRUD operations to starve. So, it&apos;s good to reclaim the lock and storage resources early from the failed transaction.&lt;/p&gt;

&lt;p&gt;Note: Any individual statements in a transaction other than commit/abort cmd are definitely not retryable even if we attach a &lt;a href=&quot;https://github.com/mongodb/specifications/blob/master/source/retryable-writes/retryable-writes.rst#specification&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;retyable error code&lt;/a&gt; as we &lt;a href=&quot;https://github.com/mongodb/mongo/blob/260a0ced5d3754f375fee6e220855e722c4b72b8/src/mongo/base/transaction_error.cpp#L59&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;attach TransientTransaction Error (TTE)&lt;/a&gt; label to it. TTE signals that it&apos;s safe to retry the entire transaction.&lt;/p&gt;</description>
                <environment></environment>
        <key id="874518">SERVER-42388</key>
            <summary>Release the transaction lock resources and abort storage transaction for unprepared  transactions on failure to unstash the transaction resources to opCtx.</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="suganthi.mani@mongodb.com">Suganthi Mani</assignee>
                                    <reporter username="suganthi.mani@mongodb.com">Suganthi Mani</reporter>
                        <labels>
                    </labels>
                <created>Wed, 24 Jul 2019 18:58:35 +0000</created>
                <updated>Sun, 29 Oct 2023 22:18:48 +0000</updated>
                            <resolved>Thu, 25 Jul 2019 04:15:06 +0000</resolved>
                                                    <fixVersion>4.2.0-rc5</fixVersion>
                    <fixVersion>4.3.1</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2342711" author="xgen-internal-githook" created="Thu, 25 Jul 2019 04:09:58 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Suganthi Mani&apos;, &apos;email&apos;: &apos;suganthi.mani@mongodb.com&apos;, &apos;username&apos;: &apos;smani87&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-42388&quot; title=&quot;Release the transaction lock resources and abort storage transaction for unprepared  transactions on failure to unstash the transaction resources to opCtx.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-42388&quot;&gt;&lt;del&gt;SERVER-42388&lt;/del&gt;&lt;/a&gt; Release the transaction lock resources and abort storage&lt;br/&gt;
transaction for unprepared transactions on failure to unstash the&lt;br/&gt;
transaction resources to opCtx.&lt;/p&gt;

&lt;p&gt;(cherry picked from commit f5f62f877b62523205d02f810f351b06cf1e58c4)&lt;br/&gt;
Branch: v4.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ada10b0aca7e7dc977ae706e5ea054d39341c9a8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ada10b0aca7e7dc977ae706e5ea054d39341c9a8&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2342702" author="xgen-internal-githook" created="Thu, 25 Jul 2019 03:57:29 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Suganthi Mani&apos;, &apos;username&apos;: &apos;smani87&apos;, &apos;email&apos;: &apos;suganthi.mani@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-42388&quot; title=&quot;Release the transaction lock resources and abort storage transaction for unprepared  transactions on failure to unstash the transaction resources to opCtx.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-42388&quot;&gt;&lt;del&gt;SERVER-42388&lt;/del&gt;&lt;/a&gt; Release the transaction lock resources and abort storage&lt;br/&gt;
transaction for unprepared transactions on failure to unstash the&lt;br/&gt;
transaction resources to opCtx.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f5f62f877b62523205d02f810f351b06cf1e58c4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f5f62f877b62523205d02f810f351b06cf1e58c4&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2342568" author="suganthi.mani" created="Wed, 24 Jul 2019 23:17:36 +0000"  >&lt;p&gt;Consider a case where we accidentally ran into executing an invalid statement/cmd in  a transaction, this means we would abort the entire transaction.  So, its not safe to wrap &lt;a href=&quot;https://github.com/mongodb/mongo/blob/260a0ced5d3754f375fee6e220855e722c4b72b8/src/mongo/db/service_entry_point_common.cpp#L391&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;beginOrContinue&lt;/a&gt; in an errorGuard (aborts the transaction). Below are the js tests that explicitly test the above behavior.&lt;br/&gt;
 1) &lt;a href=&quot;https://github.com/mongodb/mongo/blob/f4399fceab41c4dfaad6b846b94e1366f67d93cd/jstests/core/txns/multi_statement_transaction_command_args.js#L111-L137&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;multi_statement_transaction_command_args.js&lt;/a&gt;&lt;br/&gt;
2) &lt;a href=&quot;https://github.com/mongodb/mongo/blob/f4399fceab41c4dfaad6b846b94e1366f67d93cd/jstests/core/txns/no_read_or_write_concern_inside_txn.js#L61-L78&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;no_read_or_write_concern_inside_txn.js&lt;/a&gt;&lt;br/&gt;
3) &lt;a href=&quot;https://github.com/mongodb/mongo/blob/f4399fceab41c4dfaad6b846b94e1366f67d93cd/jstests/core/txns/prepare_nonexistent_transaction.js#L33-L41&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;prepare_nonexistent_transaction.js&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="874456">SERVER-42381</issuekey>
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                            <issuelinktype id="10012">
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            <issuekey id="790517">SERVER-41556</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="874747">SERVER-42404</issuekey>
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