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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-16616] &quot;chunks out of order&quot; error during md5sum command </title>
                <link>https://jira.mongodb.org/browse/SERVER-16616</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Just started seeing this on Jenkins starting with 2.8rc3. The test that triggers it writes 100 1-chunk files to GridFS using 10 threads in python. A few of the threads end up throwing this error. All writes are done with w=1 write concern.&lt;/p&gt;

&lt;p&gt;The test code is here:&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-python-driver/blob/v2.8/test/test_gridfs.py#L179-L194&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-python-driver/blob/v2.8/test/test_gridfs.py#L179-L194&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;An example of the failure in Jenkins can be seen here:&lt;br/&gt;
&lt;a href=&quot;http://jenkins.bci.10gen.cc:8080/view/Python/job/mongo-python-driver-v2.8/75/extensions=with-extensions,label=linux64,mongodb_configuration=single_server,mongodb_server=master-nightly-release,python_language_version=3.2/console&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://jenkins.bci.10gen.cc:8080/view/Python/job/mongo-python-driver-v2.8/75/extensions=with-extensions,label=linux64,mongodb_configuration=single_server,mongodb_server=master-nightly-release,python_language_version=3.2/console&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;I&apos;ve attached the log for this failure. I can&apos;t reproduce the problem locally, just in Jenkins. But the failure is pretty consistent in Jenkins. Let me know how to help debug.&lt;/p&gt;</description>
                <environment></environment>
        <key id="175595">SERVER-16616</key>
            <summary>&quot;chunks out of order&quot; error during md5sum command </summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="1" iconUrl="https://jira.mongodb.org/images/icons/priorities/blocker.svg">Blocker - P1</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="-1">Unassigned</assignee>
                                    <reporter username="bernie@mongodb.com">Bernie Hackett</reporter>
                        <labels>
                    </labels>
                <created>Sat, 20 Dec 2014 00:26:29 +0000</created>
                <updated>Mon, 22 Dec 2014 21:01:19 +0000</updated>
                            <resolved>Mon, 22 Dec 2014 21:01:19 +0000</resolved>
                                    <version>2.8.0-rc3</version>
                                                    <component>Concurrency</component>
                                        <votes>0</votes>
                                    <watches>11</watches>
                                                                                                                <comments>
                            <comment id="792570" author="rassi@10gen.com" created="Mon, 22 Dec 2014 21:01:19 +0000"  >&lt;p&gt;Thanks for the report and repro help.  I would guess from the attached test failure that f984b532 introduced a bug in IndexScan::saveState(), IndexScan::restoreState(), or IndexScan::invalidate().  Per discussion with &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=schwerin&quot; class=&quot;user-hover&quot; rel=&quot;schwerin&quot;&gt;schwerin&lt;/a&gt;, I&apos;m going to revert the commit and have Dave or Mathias (who co-authored the commit) debug this issue next week when they&apos;re back from vacation, as I don&apos;t have any spare cycles to look at this until then.&lt;/p&gt;

&lt;p&gt;Re-opening &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16437&quot; title=&quot;Simple index scans should work like CountScan&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16437&quot;&gt;&lt;del&gt;SERVER-16437&lt;/del&gt;&lt;/a&gt;, resolving this issue as a dup of that ticket.&lt;/p&gt;</comment>
                            <comment id="791726" author="dan@10gen.com" created="Sun, 21 Dec 2014 22:35:12 +0000"  >&lt;p&gt;Found it.  Thanks guys.&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;
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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;  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;f984b532331e46298d52d4c786cb359fa208f3d9 is the first bad commit&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;commit f984b532331e46298d52d4c786cb359fa208f3d9&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;Author: Jason Rassi &amp;lt;rassi@10gen.com&amp;gt;&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;Date:   Tue Dec 16 15:12:57 2014 -0500&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;&amp;nbsp;&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;    SERVER-16437 IndexScan optimize end checker for single interval scans&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;&amp;nbsp;&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;:040000 040000 9602d070ab5a8893b552610a24932f8a7c10d12f 0d3cc6b588024175370564e2d0c86c691fb1a478 M	src&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;   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;bisect run success&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</comment>
                            <comment id="791710" author="dan@10gen.com" created="Sun, 21 Dec 2014 21:58:56 +0000"  >&lt;p&gt;definite regression in rc3.  i&apos;m bisecting with slightly modified version of jeff&apos;s script.&lt;/p&gt;</comment>
                            <comment id="791704" author="jeff.yemin" created="Sun, 21 Dec 2014 20:45:34 +0000"  >&lt;p&gt;I can reproduce this locally with the attached Java program.  I get about 100 failed calls to filemd5 for every 25000 failures.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="172969">SERVER-16437</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                    </issuelinks>
                <attachments>
                            <attachment id="60192" name="SERVER16616.java" size="1503" author="jeff.yemin@mongodb.com" created="Sun, 21 Dec 2014 20:45:34 +0000"/>
                            <attachment id="60158" name="mongod.log" size="52414109" author="bernie@mongodb.com" created="Sat, 20 Dec 2014 00:26:29 +0000"/>
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