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    <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>[CDRIVER-176] data loss while writing concurrently</title>
                <link>https://jira.mongodb.org/browse/CDRIVER-176</link>
                <project id="10030" key="CDRIVER">C Driver</project>
                    <description>&lt;p&gt;this is my testcase - &lt;a href=&quot;https://gist.github.com/3987628&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://gist.github.com/3987628&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;while one process, it works all right&lt;br/&gt;
while two process, it will lose half the data&lt;/p&gt;</description>
                <environment>#uname -a &lt;br/&gt;
Linux shun.zhang-centos6-x64 2.6.32-71.29.1.el6.x86_64 #1 SMP Mon Jun 27 19:49:27 BST 2011 x86_64 x86_64 x86_64 GNU/Linux&lt;br/&gt;
&lt;br/&gt;
#lsb_release -a&lt;br/&gt;
LSB Version:	:core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch&lt;br/&gt;
Distributor ID:	CentOS&lt;br/&gt;
Description:	CentOS Linux release 6.0 (Final)&lt;br/&gt;
Release:	6.0&lt;br/&gt;
Codename:	Final</environment>
        <key id="54910">CDRIVER-176</key>
            <summary>data loss while writing concurrently</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="9">Done</resolution>
                                        <assignee username="christian.hergert@10gen.com">Christian Hergert</assignee>
                                    <reporter username="aaashun">shun.zhang</reporter>
                        <labels>
                            <label>cdriver,</label>
                            <label>gridfs</label>
                    </labels>
                <created>Wed, 31 Oct 2012 15:58:25 +0000</created>
                <updated>Thu, 21 Nov 2013 21:49:37 +0000</updated>
                            <resolved>Thu, 21 Nov 2013 21:49:37 +0000</resolved>
                                    <version>0.6</version>
                                    <fixVersion>0.90.0</fixVersion>
                                                        <votes>1</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="460061" author="christian.hergert@10gen.com" created="Thu, 21 Nov 2013 21:49:37 +0000"  >&lt;p&gt;This is fixed in the new C driver, which will be released very soon. The new C driver uses libbson&lt;span class=&quot;error&quot;&gt;&amp;#91;1&amp;#93;&lt;/span&gt;, which does not suffer from this deficiency.&lt;/p&gt;

&lt;p&gt;If you would like to try the new C driver ahead of the release, you can check out my tree here&lt;span class=&quot;error&quot;&gt;&amp;#91;2&amp;#93;&lt;/span&gt;.&lt;/p&gt;

&lt;p&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;1&amp;#93;&lt;/span&gt; &lt;a href=&quot;https://github.com/mongodb/libbson&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/libbson&lt;/a&gt;&lt;br/&gt;
&lt;span class=&quot;error&quot;&gt;&amp;#91;2&amp;#93;&lt;/span&gt; &lt;a href=&quot;https://github.com/chergert/libmongoc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/chergert/libmongoc&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="277070" author="awsiv" created="Wed, 27 Feb 2013 13:53:39 +0000"  >&lt;p&gt;we are also using mongodb-c-driver v0.6. would be nice to have this fix in.&lt;/p&gt;

&lt;p&gt;Thanks&lt;/p&gt;</comment>
                            <comment id="181493" author="aaashun" created="Thu, 1 Nov 2012 17:15:33 +0000"  >&lt;p&gt;here is pull request&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo-c-driver/pull/55/files&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-c-driver/pull/55/files&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="181399" author="aaashun" created="Thu, 1 Nov 2012 12:27:52 +0000"  >&lt;p&gt;I found the reason, that&apos;s an ugly implemtation of &quot;ObjectId generator&quot; which does not match the specification &lt;a href=&quot;http://www.mongodb.org/display/DOCS/ObjectId&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://www.mongodb.org/display/DOCS/ObjectId&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;I&apos;ll commit a patch to fix the bug.&lt;/p&gt;</comment>
                            <comment id="181348" author="aaashun" created="Thu, 1 Nov 2012 08:45:38 +0000"  >&lt;p&gt;mongo-python-driver works well, &lt;a href=&quot;https://gist.github.com/3992535&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://gist.github.com/3992535&lt;/a&gt;&lt;/p&gt;</comment>
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