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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-16833] wt &quot;backup&quot; command fails when run against a mongod with wiredTiger storage engine&apos;s dbpath</title>
                <link>https://jira.mongodb.org/browse/SERVER-16833</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;to repro:&lt;/p&gt;

&lt;p&gt;1) start up a mongod with --storageEngine=wiredTiger&lt;br/&gt;
2) insert some data&lt;br/&gt;
3) shut it down.&lt;br/&gt;
4) use the &quot;wt&quot; command to try to generate a backup:&lt;/p&gt;

&lt;p/&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;./wt -C &quot;extensions=[./ext/compressors/snappy/.libs/libwiredtiger_snappy.so]&quot; -h /data/db/copied_path2/ backup /tmp&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;lt-wt: /data/db/copied_path2//WiredTigerLog.0000000011: No such file or directory&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
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&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;The file that it looks for is actually in journal/ within the specified path, but the WT command won&apos;t look in there. It still won&apos;t work even when trying to specifically point it to journal/ :&lt;/p&gt;
&lt;p/&gt;
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&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;$ ./wt -C &quot;extensions=[./ext/compressors/snappy/.libs/libwiredtiger_snappy.so],log=(path=journal)&quot; -h /data/db/copied_path2 backup /tmp/&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;lt-wt: /data/db/copied_path2/WiredTigerLog.0000000015: No such file or directory&lt;/span&gt;&lt;/pre&gt;
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					&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;
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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;$ ./wt -C &quot;extensions=[./ext/compressors/snappy/.libs/libwiredtiger_snappy.so]&quot; -h /data/db/copied_path2/journal backup /tmp/&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;[1421186937:53197][11490:0x7f308da78740], wiredtiger_open: /data/db/copied_path2/journal/WiredTiger: No such file or directory&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;</description>
                <environment></environment>
        <key id="178545">SERVER-16833</key>
            <summary>wt &quot;backup&quot; command fails when run against a mongod with wiredTiger storage engine&apos;s dbpath</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="3">Duplicate</resolution>
                                        <assignee username="backlog-server-execution">Backlog - Storage Execution Team</assignee>
                                    <reporter username="mikeo@mongodb.com">Michael O&apos;Brien</reporter>
                        <labels>
                            <label>28qa</label>
                    </labels>
                <created>Tue, 13 Jan 2015 22:09:05 +0000</created>
                <updated>Tue, 6 Dec 2022 04:57:08 +0000</updated>
                            <resolved>Tue, 6 Sep 2016 05:17:19 +0000</resolved>
                                                                    <component>Storage</component>
                    <component>WiredTiger</component>
                                        <votes>1</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="1277599" author="ramon.fernandez" created="Fri, 27 May 2016 14:44:10 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=johny&quot; class=&quot;user-hover&quot; rel=&quot;johny&quot;&gt;johny&lt;/a&gt;, it seems your dataset is corrupt, and &lt;tt&gt;mongod&lt;/tt&gt; is not able to repair it. &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19815&quot; title=&quot;Improved mongod --repair option for WiredTiger&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19815&quot;&gt;&lt;del&gt;SERVER-19815&lt;/del&gt;&lt;/a&gt; is open to improve this functionality, so feel free to watch that ticket and vote for it.&lt;/p&gt;

&lt;p&gt;As Michael pointed out, for MongoDB-related support discussion please post on the &lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mongodb-user group&lt;/a&gt; or &lt;a href=&quot;http://stackoverflow.com/questions/tagged/mongodb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Stack Overflow with the &lt;tt&gt;mongodb&lt;/tt&gt; tag&lt;/a&gt;, where your question will reach a larger audience. A question like yours involving more discussion would be best posted on the &lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mongodb-user group&lt;/a&gt;. See also our &lt;a href=&quot;https://www.mongodb.org/about/support/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Technical Support page&lt;/a&gt; for additional support resources.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Ram&#243;n.&lt;/p&gt;</comment>
                            <comment id="1277494" author="johny" created="Fri, 27 May 2016 13:09:16 +0000"  >&lt;p&gt;Thanks Michael... but I actually tried mongod --repair both on windows and linux mongo installation. During repair mongo crashes :&lt;br/&gt;
-------------------------&lt;br/&gt;
2016-05-26T16:49:18.436-0600 I STORAGE &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; repairDatabase test&lt;br/&gt;
2016-05-26T16:49:18.437-0600 I STORAGE &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; Repairing collection test.testPositions&lt;br/&gt;
2016-05-26T16:49:18.437-0600 I STORAGE &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; Verify failed on uri table:collection-4--8207586138070318465. Ru&lt;br/&gt;
nning a salvage operation.&lt;br/&gt;
2016-05-26T16:49:18.437-0600 I - &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; Invariant failure rs.get() src\mongo\db\catalog\database.cpp 190&lt;/p&gt;

&lt;p&gt;2016-05-26T16:49:18.438-0600 I - &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt;&lt;/p&gt;

&lt;p&gt;***aborting after invariant() failure&lt;br/&gt;
----------------------------&lt;/p&gt;</comment>
                            <comment id="1277158" author="michael.cahill" created="Fri, 27 May 2016 05:41:51 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=johny&quot; class=&quot;user-hover&quot; rel=&quot;johny&quot;&gt;johny&lt;/a&gt;, the original issue reported here is specific to backups, so it is not relevant to the error you are getting.&lt;/p&gt;

&lt;p&gt;A better forum for your question is the MongoDB user list &lt;a href=&quot;https://groups.google.com/forum/#!forum/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://groups.google.com/forum/#!forum/mongodb-user&lt;/a&gt; &amp;#8211; my first question would be why not use &lt;tt&gt;mongod --repair&lt;/tt&gt;, which will run a salvage on any collections that fail validation.&lt;/p&gt;</comment>
                            <comment id="1276909" author="johny" created="Thu, 26 May 2016 21:35:15 +0000"  >&lt;p&gt;has this been ever resolved? &lt;br/&gt;
I have the same error when trying to recover the data:&lt;/p&gt;

&lt;p&gt;root@vm:/home/wiredtiger-2.8.0# ./wt &lt;del&gt;v -h ../mongo-bak/ -C &quot;extensions=&lt;span class=&quot;error&quot;&gt;&amp;#91;./ext/compressors/snappy/.libs/libwiredtiger_snappy.so&amp;#93;&lt;/span&gt;&quot; -R salvage collection-0&lt;/del&gt;-2418654698497411062.wt&lt;br/&gt;
lt-wt: No such file or directory&lt;/p&gt;</comment>
                    </comments>
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