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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>
    </build-info>


<item>
            <title>[SERVER-19990] abort in bt_discard.c, 419</title>
                <link>https://jira.mongodb.org/browse/SERVER-19990</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://logkeeper.mongodb.org/build/55d24df390413011a25f61c1/all&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://logkeeper.mongodb.org/build/55d24df390413011a25f61c1/all&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;This was a replication jstest running on the head of master branch.  The secondary node hit this error and shut down:&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;[ReplicaSetFixture:job0:secondary] 2015-08-17T21:14:17.531+0000 E STORAGE  [thread1] WiredTiger (0) [1439846057:531093][2736:2005873552], file:collection-992-5875615686962012966.wt, eviction-worker: src\third_party\wiredtiger\src\btree\bt_discard.c, 419: F_ISSET(session, WT_SESSION_DISCARD_FORCE) || upd-&amp;gt;txnid == WT_TXN_ABORTED || __wt_txn_visible_all(session, upd-&amp;gt;txnid)&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;[ReplicaSetFixture:job0:secondary] 2015-08-17T21:14:17.531+0000 E STORAGE  [thread2] WiredTiger (0) [1439846057:531093][2736:2005873552], file:index-993-5875615686962012966.wt, eviction-worker: src\third_party\wiredtiger\src\btree\bt_discard.c, 419: F_ISSET(session, WT_SESSION_DISCARD_FORCE) || upd-&amp;gt;txnid == WT_TXN_ABORTED || __wt_txn_visible_all(session, upd-&amp;gt;txnid)&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;[ReplicaSetFixture:job0:secondary] 2015-08-17T21:14:17.531+0000 E STORAGE  [thread1] WiredTiger (0) [1439846057:531093][2736:2005873552], file:collection-992-5875615686962012966.wt, eviction-worker: aborting WiredTiger library&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;[ReplicaSetFixture:job0:secondary] 2015-08-17T21:14:17.531+0000 E STORAGE  [thread2] WiredTiger (0) [1439846057:531093][2736:2005873552], file:index-993-5875615686962012966.wt, eviction-worker: aborting WiredTiger library&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;This appears to have happened after three attempts by replication to drop a collection.  It appears three times in the log, so my guess is that it may have hit a WriteConflictException and retried.  I believe there is really only one drop instruction in the replication stream.&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;[ReplicaSetFixture:job0:secondary] 2015-08-17T21:14:12.544+0000 I COMMAND  [repl writer worker 2] CMD: drop test.cursora&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;[ReplicaSetFixture:job0:secondary] 2015-08-17T21:14:16.079+0000 I COMMAND  [repl writer worker 1] CMD: drop test.cursora&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;[ReplicaSetFixture:job0:secondary] 2015-08-17T21:14:17.117+0000 I COMMAND  [repl writer worker 1] CMD: drop test.cursora&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</description>
                <environment></environment>
        <key id="226000">SERVER-19990</key>
            <summary>abort in bt_discard.c, 419</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="9">Done</resolution>
                                        <assignee username="michael.cahill@mongodb.com">Michael Cahill</assignee>
                                    <reporter username="milkie@mongodb.com">Eric Milkie</reporter>
                        <labels>
                    </labels>
                <created>Mon, 17 Aug 2015 21:24:08 +0000</created>
                <updated>Tue, 22 Sep 2015 12:11:27 +0000</updated>
                            <resolved>Fri, 28 Aug 2015 07:09:31 +0000</resolved>
                                    <version>3.1.7</version>
                                    <fixVersion>3.1.8</fixVersion>
                                    <component>WiredTiger</component>
                                        <votes>0</votes>
                                    <watches>10</watches>
                                                                                                                <comments>
                            <comment id="1039298" author="michael.cahill" created="Tue, 22 Sep 2015 04:36:33 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=ramon.fernandez&quot; class=&quot;user-hover&quot; rel=&quot;ramon.fernandez&quot;&gt;ramon.fernandez&lt;/a&gt;, WiredTiger only checks assertions when configured for diagnostic builds, so we could only see this in debug builds on MongoDB.  Triggering this would require a combination of high insert rates and collection drops on a debug build (and hasn&apos;t shown up in Evergreen in 3.0, as far as I know).&lt;/p&gt;

&lt;p&gt;tl;dr I am happy not to backport this.&lt;/p&gt;</comment>
                            <comment id="1016708" author="michael.cahill" created="Fri, 28 Aug 2015 07:09:31 +0000"  >&lt;p&gt;Should be fixed by the latest WT drop into MongoDB master.&lt;/p&gt;</comment>
                            <comment id="1014806" author="milkie" created="Wed, 26 Aug 2015 13:16:14 +0000"  >&lt;p&gt;Recording another test failure instance here, for tracking purposes:&lt;br/&gt;
&lt;a href=&quot;https://evergreen.mongodb.com/task/mongodb_mongo_master_windows_64_2k8_debug_jsCore_small_oplog_rs_WT_5d76623abc23f453c6530b1f8543476c5d65c4e9_15_08_26_04_49_10&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://evergreen.mongodb.com/task/mongodb_mongo_master_windows_64_2k8_debug_jsCore_small_oplog_rs_WT_5d76623abc23f453c6530b1f8543476c5d65c4e9_15_08_26_04_49_10&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1013485" author="xgen-internal-githook" created="Tue, 25 Aug 2015 01:35:15 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;agorrod&apos;, u&apos;name&apos;: u&apos;Alex Gorrod&apos;, u&apos;email&apos;: u&apos;alexander.gorrod@mongodb.com&apos;}
&lt;p&gt;Message: Merge pull request #2145 from wiredtiger/&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19990&quot; title=&quot;abort in bt_discard.c, 419&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19990&quot;&gt;&lt;del&gt;SERVER-19990&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19990&quot; title=&quot;abort in bt_discard.c, 419&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19990&quot;&gt;&lt;del&gt;SERVER-19990&lt;/del&gt;&lt;/a&gt; Don&apos;t assert on eviction of live updates from dead trees.&lt;br/&gt;
Branch: develop&lt;br/&gt;
&lt;a href=&quot;https://github.com/wiredtiger/wiredtiger/commit/3e46e79990170b9fd4c03e087c6876c22733fe5f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/wiredtiger/wiredtiger/commit/3e46e79990170b9fd4c03e087c6876c22733fe5f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1013484" author="xgen-internal-githook" created="Tue, 25 Aug 2015 01:35:13 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;agorrod&apos;, u&apos;name&apos;: u&apos;Alex Gorrod&apos;, u&apos;email&apos;: u&apos;alexander.gorrod@mongodb.com&apos;}
&lt;p&gt;Message: Merge pull request #2145 from wiredtiger/&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19990&quot; title=&quot;abort in bt_discard.c, 419&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19990&quot;&gt;&lt;del&gt;SERVER-19990&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19990&quot; title=&quot;abort in bt_discard.c, 419&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19990&quot;&gt;&lt;del&gt;SERVER-19990&lt;/del&gt;&lt;/a&gt; Don&apos;t assert on eviction of live updates from dead trees.&lt;br/&gt;
Branch: develop&lt;br/&gt;
&lt;a href=&quot;https://github.com/wiredtiger/wiredtiger/commit/3e46e79990170b9fd4c03e087c6876c22733fe5f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/wiredtiger/wiredtiger/commit/3e46e79990170b9fd4c03e087c6876c22733fe5f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1013483" author="xgen-internal-githook" created="Tue, 25 Aug 2015 01:35:12 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;michaelcahill&apos;, u&apos;name&apos;: u&apos;Michael Cahill&apos;, u&apos;email&apos;: u&apos;michael.cahill@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19990&quot; title=&quot;abort in bt_discard.c, 419&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19990&quot;&gt;&lt;del&gt;SERVER-19990&lt;/del&gt;&lt;/a&gt; Don&apos;t assert on eviction of live updates from dead trees.&lt;br/&gt;
Branch: develop&lt;br/&gt;
&lt;a href=&quot;https://github.com/wiredtiger/wiredtiger/commit/470648d1fe51287f260d133282adf8b3f7c7004d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/wiredtiger/wiredtiger/commit/470648d1fe51287f260d133282adf8b3f7c7004d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1012650" author="michael.cahill" created="Mon, 24 Aug 2015 07:36:33 +0000"  >&lt;p&gt;tl;dr I think I understand this, and the assertion is too strong.  I&apos;ll fix.&lt;/p&gt;

&lt;p&gt;I believe a tree has been marked &quot;dead&quot; by WiredTiger, which happens during a drop operation so the file can be removed from cache in the background (to keep the application drop operation fast).  Once in this state, it is okay to throw away all of the updates from the tree, and that usually happens quickly when WiredTiger&apos;s &quot;sweep&quot; thread notices a dead tree and discards it.&lt;/p&gt;

&lt;p&gt;However, if there is enough cache pressure, eviction will also try to discard pages from dead trees before the sweep server gets to them, and in that case, this assertion should not fire.  It is likely that recent changes to sweep have made this more likely, which is why we are seeing these assertions now.&lt;/p&gt;</comment>
                            <comment id="1011655" author="milkie" created="Fri, 21 Aug 2015 13:46:21 +0000"  >&lt;p&gt;Another example of a failure, on Windows, but in the same test suite as the others:&lt;br/&gt;
&lt;a href=&quot;https://evergreen.mongodb.com/task/mongodb_mongo_master_windows_64_2k8_debug_jsCore_small_oplog_rs_WT_7d7f4fb3b6f6a171eacf53384053df0fe728db42_15_08_20_21_16_10&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://evergreen.mongodb.com/task/mongodb_mongo_master_windows_64_2k8_debug_jsCore_small_oplog_rs_WT_7d7f4fb3b6f6a171eacf53384053df0fe728db42_15_08_20_21_16_10&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;This might be incidental, but the failure looks like it typically comes immediately after a foreground index build, which means WT&apos;s bulk inserter was exercised.&lt;/p&gt;</comment>
                            <comment id="1011592" author="schwerin" created="Fri, 21 Aug 2015 12:46:35 +0000"  >&lt;p&gt;Looks like the signal handlers are configured with SA_RESETHAND, which indeed makes double aborts lose stack traces. I believe that is fixable, at least.&lt;/p&gt;</comment>
                            <comment id="1011589" author="milkie" created="Fri, 21 Aug 2015 12:36:49 +0000"  >&lt;p&gt;Oh, it might be because two threads called abort() simultaneously.  The second abort() might just kill the process?  Signals are hard.&lt;/p&gt;</comment>
                            <comment id="1011588" author="milkie" created="Fri, 21 Aug 2015 12:33:44 +0000"  >&lt;p&gt;I cannot explain why we aren&apos;t getting a stacktrace, as it seems that we are definitely calling abort(), which ought to fall into the signal handler for SIGABRT and produce a stack trace.  Odd.&lt;/p&gt;</comment>
                            <comment id="1011587" author="milkie" created="Fri, 21 Aug 2015 12:31:01 +0000"  >&lt;p&gt;Details:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://evergreen.mongodb.com/task/mongodb_mongo_master_ubuntu1410_debug_asan_jsCore_small_oplog_rs_WT_7d7f4fb3b6f6a171eacf53384053df0fe728db42_15_08_20_21_16_10&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://evergreen.mongodb.com/task/mongodb_mongo_master_ubuntu1410_debug_asan_jsCore_small_oplog_rs_WT_7d7f4fb3b6f6a171eacf53384053df0fe728db42_15_08_20_21_16_10&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://logkeeper.mongodb.org/build/55d66c3d90413011a27bc90f/test/55d6730dbe07c47abf7bf953&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://logkeeper.mongodb.org/build/55d66c3d90413011a27bc90f/test/55d6730dbe07c47abf7bf953&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;An aside: I&apos;ve noticed that for these types of failures, no stack trace is printed in the log.  Is this unintentional?&lt;/p&gt;</comment>
                            <comment id="1011584" author="milkie" created="Fri, 21 Aug 2015 12:29:04 +0000"  >&lt;p&gt;Unfortunately, this happened again with the latest build from master.&lt;/p&gt;</comment>
                            <comment id="1007922" author="michael.cahill" created="Tue, 18 Aug 2015 06:26:42 +0000"  >&lt;p&gt;P.S.  For clarity, I know the assertion is not exactly the same, but the underlying bug was that WiredTiger&apos;s &quot;oldest ID&quot; (which determines the oldest update we have to keep available to readers) was moving too far forward.  There are various assertions in WiredTiger that check for this, including the one here as well as the one that triggered &lt;a href=&quot;https://jira.mongodb.org/browse/WT-2021&quot; title=&quot;test/thread test failure&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2021&quot;&gt;&lt;del&gt;WT-2021&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="1007920" author="michael.cahill" created="Tue, 18 Aug 2015 06:22:59 +0000"  >&lt;p&gt;I believe this is a dup of &lt;a href=&quot;https://jira.mongodb.org/browse/WT-2021&quot; title=&quot;test/thread test failure&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-2021&quot;&gt;&lt;del&gt;WT-2021&lt;/del&gt;&lt;/a&gt;, fixed in today&apos;s drop to MongoDB master.&lt;/p&gt;</comment>
                            <comment id="1007549" author="milkie" created="Mon, 17 Aug 2015 21:28:09 +0000"  >&lt;p&gt;I take back what I said about the collection drop; the &quot;cursora.js&quot; test indeed drops that collection as a routine matter of testing.  The test actually tests four different ways of inserting and removing data, and it drops the test collection in between each phase.&lt;/p&gt;</comment>
                            <comment id="1007546" author="milkie" created="Mon, 17 Aug 2015 21:25:17 +0000"  >&lt;p&gt;Here is a link to the test run itself:&lt;br/&gt;
&lt;a href=&quot;https://evergreen.mongodb.com/task/mongodb_mongo_master_windows_64_2k8_debug_jsCore_small_oplog_rs_WT_afd0f15913e95c5e530f25272e60254770350c89_15_08_17_20_15_23&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://evergreen.mongodb.com/task/mongodb_mongo_master_windows_64_2k8_debug_jsCore_small_oplog_rs_WT_afd0f15913e95c5e530f25272e60254770350c89_15_08_17_20_15_23&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
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                            <issuelinktype id="10011">
                    <name>Depends</name>
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                                        <issuelink>
            <issuekey id="212396">WT-1973</issuekey>
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