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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-61343] Invariant when killing backup cursor</title>
                <link>https://jira.mongodb.org/browse/SERVER-61343</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;On Windows, killing a backup cursor while still copying from it will cause an invariant (since WT cannot delete the file).&lt;/p&gt;

&lt;p&gt;This was found during file copy based initial sync testing; I will also file a ticket to not do this, but crashing seems undesirable anyway.&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;[j0:prim] | 2021-11-09T14:08:02.331+00:00 D2 COMMAND  21965   [conn131] &quot;About to run the command&quot;,&quot;attr&quot;:{&quot;db&quot;:&quot;admin&quot;,&quot;client&quot;:&quot;127.0.0.1:54849&quot;,&quot;commandArgs&quot;:{&quot;killCursors&quot;:&quot;$cmd.aggregate&quot;,&quot;cursors&quot;:[3906021346930736600],&quot;$db&quot;:&quot;admin&quot;}}&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;   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;[j0:prim] | 2021-11-09T14:08:02.331+00:00 E  STORAGE  22435   [conn131] &quot;WiredTiger error&quot;,&quot;attr&quot;:{&quot;error&quot;:16,&quot;message&quot;:&quot;[1636466882:330745][5124:140706774209120], WT_CURSOR.close: int __cdecl __win_fs_remove(struct __wt_file_system *,struct __wt_session *,const char *,unsigned int), 81: \\data\\db\\job0\\resmoke\\node0\\WiredTiger.backup: file-remove: DeleteFileW: The process cannot access the file because it is being used by another process.\r\n: Resource device&quot;}&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;[j0:prim] | 2021-11-09T14:08:02.331+00:00 F  ASSERT   23083   [conn131] &quot;Invariant failure&quot;,&quot;attr&quot;:{&quot;expr&quot;:&quot;_session-&amp;gt;close(_session, nullptr)&quot;,&quot;error&quot;:&quot;ObjectIsBusy: 16: Resource device&quot;,&quot;file&quot;:&quot;src\\mongo\\db\\storage\\wiredtiger\\wiredtiger_session_cache.cpp&quot;,&quot;line&quot;:78}&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;[j0:prim] | 2021-11-09T14:08:02.331+00:00 F  ASSERT   23084   [conn131] &quot;\n\n***aborting after invariant() failure\n\n&quot;&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;[j0:prim] | 2021-11-09T14:08:02.331+00:00 F  CONTROL  4757800 [conn131] &quot;Writing fatal message&quot;,&quot;attr&quot;:{&quot;message&quot;:&quot;Got signal: 22 (SIGABRT).\n&quot;}&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;   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;[j0:prim] | 2021-11-09T14:08:02.332+00:00 I  COMMAND  51803   [conn132] &quot;Slow query&quot;,&quot;attr&quot;:{&quot;type&quot;:&quot;command&quot;,&quot;ns&quot;:&quot;admin.$cmd.aggregate&quot;,&quot;appName&quot;:&quot;FileCopyBasedInitialSyncer&quot;,&quot;command&quot;:{&quot;aggregate&quot;:1,&quot;pipeline&quot;:[{&quot;$_backupFile&quot;:{&quot;backupId&quot;:{&quot;$uuid&quot;:&quot;0e76c891-3922-4a93-9fbf-5ace9f44756e&quot;},&quot;file&quot;:&quot;\\data\\db\\job0\\resmoke\\node0\\WiredTiger.backup&quot;,&quot;byteOffset&quot;:0}}],&quot;cursor&quot;:{&quot;batchSize&quot;:101},&quot;readConcern&quot;:{},&quot;writeConcern&quot;:{&quot;w&quot;:1,&quot;wtimeout&quot;:0},&quot;$readPreference&quot;:{&quot;mode&quot;:&quot;secondaryPreferred&quot;},&quot;$db&quot;:&quot;admin&quot;},&quot;keysExamined&quot;:0,&quot;docsExamined&quot;:0,&quot;cursorExhausted&quot;:true,&quot;numYields&quot;:0,&quot;nreturned&quot;:1,&quot;reslen&quot;:170033,&quot;locks&quot;:{},&quot;readConcern&quot;:{&quot;provenance&quot;:&quot;implicitDefault&quot;},&quot;writeConcern&quot;:{&quot;w&quot;:1,&quot;wtimeout&quot;:0,&quot;provenance&quot;:&quot;clientSupplied&quot;},&quot;remote&quot;:&quot;127.0.0.1:54852&quot;,&quot;protocol&quot;:&quot;op_msg&quot;,&quot;durationMillis&quot;:14}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;p/&gt;</description>
                <environment></environment>
        <key id="1921370">SERVER-61343</key>
            <summary>Invariant when killing backup cursor</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="13202">Works as Designed</resolution>
                                        <assignee username="backlog-server-execution">Backlog - Storage Execution Team</assignee>
                                    <reporter username="matthew.russotto@mongodb.com">Matthew Russotto</reporter>
                        <labels>
                    </labels>
                <created>Tue, 9 Nov 2021 14:32:48 +0000</created>
                <updated>Fri, 27 Oct 2023 13:52:11 +0000</updated>
                            <resolved>Fri, 4 Mar 2022 16:24:42 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="4383854" author="haley.connelly" created="Tue, 1 Mar 2022 16:59:05 +0000"  >&lt;p&gt;Pausing on this to work on project work.&#160;&lt;/p&gt;

&lt;p&gt;One possible solution is: &lt;br/&gt;
Rather than invariant in the destructor, if the session fails to close, queue the session on some list of dead sessions in the WiredTigerSessionCache. The proposed solution needs some exploration- there could be a potential deadlock between trying to shutdown the cache and trying to re-queue sessions that fail to close.&lt;/p&gt;</comment>
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            <issuekey id="1921377">SERVER-61344</issuekey>
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