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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-38420] Mongos returns confusing error message if receives request with higher transaction number without &apos;startTransaction&apos;</title>
                <link>https://jira.mongodb.org/browse/SERVER-38420</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Based on &lt;a href=&quot;https://github.com/mongodb/specifications/pull/416#discussion_r239178689&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this&lt;/a&gt;&#160;conversation in the driver&apos;s spec for pinning a transaction to a single mongos, I found that mongos returns NoSuchTransaction if the mongos receives a request for a transaction number different from the last transaction number it had heard but without &apos;startTransaction&apos;. Perhaps this error message can be more clear? I had assumed the error would be something like &quot;cannot start new transaction unless &apos;startTransaction&apos; is specified.&quot;&lt;/p&gt;

&lt;p&gt;There&apos;s a &lt;a href=&quot;https://github.com/mongodb/mongo/blob/0945e6c3906a7fd9c07b0add771f7b263647db63/src/mongo/s/transaction_router.cpp#L491&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;TODO in the code&lt;/a&gt;&#160;without a SERVER ticket, so I&apos;m just filing this ticket to go back to it.&lt;/p&gt;</description>
                <environment></environment>
        <key id="644948">SERVER-38420</key>
            <summary>Mongos returns confusing error message if receives request with higher transaction number without &apos;startTransaction&apos;</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="3">Duplicate</resolution>
                                        <assignee username="backlog-server-sharding">[DO NOT USE] Backlog - Sharding Team</assignee>
                                    <reporter username="esha.maharishi@mongodb.com">Esha Maharishi</reporter>
                        <labels>
                    </labels>
                <created>Wed, 5 Dec 2018 18:20:54 +0000</created>
                <updated>Tue, 6 Dec 2022 03:11:26 +0000</updated>
                            <resolved>Wed, 5 Dec 2018 18:37:22 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="2081595" author="shane.harvey" created="Wed, 5 Dec 2018 18:52:58 +0000"  >&lt;p&gt;For easier reference, the current confusing error message is:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;  &apos;ok&apos;: 0.0,&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;  &apos;errmsg&apos;: &apos;cannot continue txnId -1 for session 28938f50-9d29-4ca5-8de5-ddaf261267c4 - 47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU= with txnId 1&apos;,&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;  &apos;code&apos;: 251,&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;  &apos;codeName&apos;: &apos;NoSuchTransaction&apos;,&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;  &apos;errorLabels&apos;: [&apos;TransientTransactionError&apos;]&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;
&lt;p&gt;Where &lt;tt&gt;&quot;txnId -1&quot;&lt;/tt&gt; is what the server knows and &lt;tt&gt;&quot;txnId 1&quot;&lt;/tt&gt; is the value the client sent (&lt;tt&gt;&quot;txnNumber&quot;: 1&lt;/tt&gt;).&lt;/p&gt;</comment>
                            <comment id="2081558" author="renctan" created="Wed, 5 Dec 2018 18:36:05 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=esha.maharishi&quot; class=&quot;user-hover&quot; rel=&quot;esha.maharishi&quot;&gt;esha.maharishi&lt;/a&gt; Yes, this for the case for retrying commit on a totally different mongos. Since commit doesn&apos;t have startTransaction and can be called on a mongos that doesn&apos;t have any knowledge about the transaction, it has to be handled differently. This will be taken care of as part of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37344&quot; title=&quot;Implement recovery token for retrying a commit command on a different mongos&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37344&quot;&gt;&lt;del&gt;SERVER-37344&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="2081523" author="esha.maharishi@10gen.com" created="Wed, 5 Dec 2018 18:22:20 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=renctan&quot; class=&quot;user-hover&quot; rel=&quot;renctan&quot;&gt;renctan&lt;/a&gt;, do you remember why there was a TODO there?&lt;/p&gt;</comment>
                    </comments>
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                    <name>Duplicate</name>
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            <issuekey id="610799">SERVER-37344</issuekey>
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