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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-4129] server segfault when starting with a wrong replSet name</title>
                <link>https://jira.mongodb.org/browse/SERVER-4129</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I was running a culster named &quot;cluster_green&quot; with 5 servers (4 main servers and one arbiter).&lt;br/&gt;
I deleted all the databases (rm on disk) on the four main servers, but left the 5th server (the arbiter) unchanged.&lt;br/&gt;
I then configured the four main servers to use a different replSet called &quot;green&quot;.&lt;br/&gt;
When I restarted the arbiter, configured to replSet &quot;green&quot;, the server crashed.&lt;br/&gt;
(see attached log file)&lt;/p&gt;</description>
                <environment>debian linux 64bit</environment>
        <key id="23976">SERVER-4129</key>
            <summary>server segfault when starting with a wrong replSet name</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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="milkie@mongodb.com">Eric Milkie</assignee>
                                    <reporter username="finsterwalder">Malte Finsterwalder</reporter>
                        <labels>
                    </labels>
                <created>Mon, 24 Oct 2011 11:42:07 +0000</created>
                <updated>Mon, 11 Jul 2016 18:32:44 +0000</updated>
                            <resolved>Wed, 21 Dec 2011 19:22:21 +0000</resolved>
                                    <version>2.0.1</version>
                                    <fixVersion>2.1.0</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="75145" author="milkie" created="Wed, 21 Dec 2011 19:22:15 +0000"  >&lt;p&gt;The call stack indicates an access of a global variable that needs mutex protection.  I added a mutex so it should no longer crash; this will be present in  version 2.1.0.&lt;/p&gt;</comment>
                            <comment id="74873" author="auto" created="Tue, 20 Dec 2011 21:43:47 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;milkie&apos;, u&apos;name&apos;: u&apos;Eric Milkie&apos;, u&apos;email&apos;: u&apos;milkie@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-4129&quot; title=&quot;server segfault when starting with a wrong replSet name&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-4129&quot;&gt;&lt;del&gt;SERVER-4129&lt;/del&gt;&lt;/a&gt; fix race condition on global by adding mutex protection&lt;/p&gt;

&lt;p&gt;This global variable is accessed by multiple threads (via multiple connections); one thread&lt;br/&gt;
can write to the std::set while another is reading, and bad things happen.  Helgrind threw fits&lt;br/&gt;
for this one until I patched things over by making this code change.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8de99aae6b84dee5a09481e2b50da518456522bd&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8de99aae6b84dee5a09481e2b50da518456522bd&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="69564" author="kristina" created="Tue, 29 Nov 2011 16:58:47 +0000"  >&lt;p&gt;I am unable to reproduce, but I think you ran into a threading bug with seed discovery.  Working on it...&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
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                                        <issuelink>
            <issuekey id="38314">SERVER-5806</issuekey>
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                            <attachment id="13574" name="mongodump.log" size="4166" author="finsterwalder" created="Mon, 24 Oct 2011 11:42:07 +0000"/>
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