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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-31261] Improve diagnosibility of long running transactions in OperationContext</title>
                <link>https://jira.mongodb.org/browse/SERVER-31261</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;One idea: (Debug mode only) Start a timer when a txn starts; when txn ends, if the timer expires, log a message.&lt;/p&gt;</description>
                <environment></environment>
        <key id="432889">SERVER-31261</key>
            <summary>Improve diagnosibility of long running transactions in OperationContext</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="3">Duplicate</resolution>
                                        <assignee username="backlog-server-execution">Backlog - Storage Execution Team</assignee>
                                    <reporter username="milkie@mongodb.com">Eric Milkie</reporter>
                        <labels>
                            <label>SWDI</label>
                    </labels>
                <created>Tue, 26 Sep 2017 14:07:32 +0000</created>
                <updated>Tue, 6 Dec 2022 03:51:00 +0000</updated>
                            <resolved>Fri, 25 May 2018 20:50:52 +0000</resolved>
                                                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>9</watches>
                                                                                                                <comments>
                            <comment id="1850232" author="geert.bosch" created="Fri, 30 Mar 2018 16:01:20 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-21367&quot; title=&quot;Log long-running WT transactions in the integration layer&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-21367&quot;&gt;&lt;del&gt;SERVER-21367&lt;/del&gt;&lt;/a&gt; already implements this idea. If the log level for the storage component is at least 1, a message with severity D (Debug) will be logged when the WiredTiger transaction takes longer than &lt;tt&gt;slowMS&lt;/tt&gt; millis, we will log a message like:&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;
		&lt;tbody &gt;
				&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;  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;2016-12-02T16:07:44.386-0500 D STORAGE  [initandlisten] Slow WT transaction.&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&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;   margin-bottom: 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;Lifetime of SnapshotId 4 was 2ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;Given that, it seems this is a duplicate.&lt;/p&gt;</comment>
                            <comment id="1836738" author="ian@10gen.com" created="Fri, 16 Mar 2018 15:41:12 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=geert.bosch&quot; class=&quot;user-hover&quot; rel=&quot;geert.bosch&quot;&gt;geert.bosch&lt;/a&gt; can you please speak to &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=bruce.lucas&quot; class=&quot;user-hover&quot; rel=&quot;bruce.lucas&quot;&gt;bruce.lucas&lt;/a&gt; to confirm where this should go before we bounce it to another team?&lt;/p&gt;</comment>
                            <comment id="1836623" author="ian@10gen.com" created="Fri, 16 Mar 2018 14:42:02 +0000"  >&lt;p&gt;Sorry for the hot potato but bouncing to Repl since this is a request for the not-yet-released transactions work.&lt;/p&gt;</comment>
                            <comment id="1682330" author="bruce.lucas@10gen.com" created="Tue, 26 Sep 2017 18:22:11 +0000"  >&lt;p&gt;Maybe the max transaction time for an operation could be recorded logged as part of slow query logging?&lt;/p&gt;

&lt;p&gt;For very long transactions that may not complete, e.g. because they are hung or because they cause a hang by getting the cache stuck full, possibly a message could be logged say every 10 seconds that a transaction is open. Normally you wouldn&apos;t want to log anything while holding a transaction, but if the transaction has been going 10 seconds logging a message may not make it particularly worse.&lt;/p&gt;

&lt;p&gt;The above would be for normal operation, not just debug mode, to help diagnose these issues in the field.&lt;/p&gt;</comment>
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