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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-7849] manyclients.js failing since switch to V8</title>
                <link>https://jira.mongodb.org/browse/SERVER-7849</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;http://buildbot.mongodb.org/builders/Nightly%20OS%20X%2010.5%2064-bit/builds/1107&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://buildbot.mongodb.org/builders/Nightly%20OS%20X%2010.5%2064-bit/builds/1107&lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;http://buildbot.mongodb.org/builders/Nightly%20Solaris-SmartOS%2064-bit/builds/163&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://buildbot.mongodb.org/builders/Nightly%20Solaris-SmartOS%2064-bit/builds/163&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="58392">SERVER-7849</key>
            <summary>manyclients.js failing since switch to V8</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="eliot">Eliot Horowitz</assignee>
                                    <reporter username="ian@mongodb.com">Ian Whalen</reporter>
                        <labels>
                            <label>buildbot</label>
                    </labels>
                <created>Wed, 5 Dec 2012 18:39:56 +0000</created>
                <updated>Mon, 11 Jul 2016 17:56:06 +0000</updated>
                            <resolved>Wed, 9 Jan 2013 22:15:22 +0000</resolved>
                                                    <fixVersion>2.3.2</fixVersion>
                                    <component>Testing Infrastructure</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="234503" author="auto" created="Tue, 8 Jan 2013 21:31:22 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2013-01-08T21:31:10Z&apos;, u&apos;email&apos;: u&apos;ben.becker@10gen.com&apos;, u&apos;name&apos;: u&apos;Ben Becker&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7849&quot; title=&quot;manyclients.js failing since switch to V8&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7849&quot;&gt;&lt;del&gt;SERVER-7849&lt;/del&gt;&lt;/a&gt;: typo&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e03279bb3d581b87b01486fa496267b57bf6b304&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e03279bb3d581b87b01486fa496267b57bf6b304&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="234472" author="auto" created="Tue, 8 Jan 2013 20:57:49 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2013-01-08T20:56:49Z&apos;, u&apos;email&apos;: u&apos;eliot@10gen.com&apos;, u&apos;name&apos;: u&apos;Eliot Horowitz&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7849&quot; title=&quot;manyclients.js failing since switch to V8&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7849&quot;&gt;&lt;del&gt;SERVER-7849&lt;/del&gt;&lt;/a&gt;: fix Random.genExp when random returns 0&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/95a3407fa9a673ac21e966e6f5e751ab35b63311&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/95a3407fa9a673ac21e966e6f5e751ab35b63311&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="234014" author="tad" created="Tue, 8 Jan 2013 10:47:54 +0000"  >&lt;p&gt;There are some print() statements in the test, and I got output from them in only one out of four trials.&lt;/p&gt;

&lt;p&gt;I agree that the test is aggressive and I also concluded that testing whether a large number of connections could be completed with none taking over five seconds was not useful.&lt;/p&gt;</comment>
                            <comment id="233837" author="auto" created="Tue, 8 Jan 2013 05:28:20 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2013-01-08T05:27:56Z&apos;, u&apos;email&apos;: u&apos;eliot@10gen.com&apos;, u&apos;name&apos;: u&apos;Eliot Horowitz&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7849&quot; title=&quot;manyclients.js failing since switch to V8&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7849&quot;&gt;&lt;del&gt;SERVER-7849&lt;/del&gt;&lt;/a&gt;: lower number of clients for debug builds and non-linux machines&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0547ed8a19c701822bc562cfcecea0688573eccc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0547ed8a19c701822bc562cfcecea0688573eccc&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="233833" author="eliot" created="Tue, 8 Jan 2013 05:23:32 +0000"  >&lt;p&gt;tad - where do you see the logging issue?&lt;br/&gt;
i think this test is too aggressive for a lot of machines.&lt;br/&gt;
it tries to spawn 400 connections instantly, and if it takes more than 5 seconds will fail.&lt;br/&gt;
don&apos;t think that&apos;s reasonable.&lt;br/&gt;
remember, these tests never ran with spidermonkey, so don&apos;t think this is a regression at all.&lt;/p&gt;</comment>
                            <comment id="233553" author="tad" created="Mon, 7 Jan 2013 22:24:08 +0000"  >&lt;p&gt;I tested on Windows 64-bit debug.  The test fails with 200 threads on my machine, but passes with 50, 100 or 150.  There are other problems: we are losing log messages (at least any from &quot;print()&quot;) and so the logged output is not reliable.  Changing a timeout value seemed to allow the creation of more connections than the test is supposed to create (I got 401 simultaneous connections when set to 200).  In one trial, the test just &quot;stopped running&quot;, with 53 threads and an equal number of open TCP connections, but all were waiting for a response to a &quot;find&quot;.  We should get the logging solid and see what information we are missing.&lt;/p&gt;</comment>
                            <comment id="228545" author="benjamin.becker" created="Tue, 1 Jan 2013 18:20:17 +0000"  >&lt;p&gt;OS X nightly needs more file descriptors (though segv is odd):&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;http://buildlogs.mongodb.org/Nightly%20OS%20X%2010.5%2064-bit%20DEBUG/builds/18/test/recent%20failures/manyclients.js&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://buildlogs.mongodb.org/Nightly%20OS%20X%2010.5%2064-bit%20DEBUG/builds/18/test/recent%20failures/manyclients.js&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Linux 32-bit failure is definitely a bug:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;http://buildlogs.mongodb.org/Nightly%20Linux%20RHEL%2032-bit/builds/332/test/parallel/manyclients.js&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://buildlogs.mongodb.org/Nightly%20Linux%20RHEL%2032-bit/builds/332/test/parallel/manyclients.js&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="228482" author="eliot" created="Tue, 1 Jan 2013 15:36:09 +0000"  >&lt;p&gt;Still happening.&lt;/p&gt;</comment>
                            <comment id="224829" author="auto" created="Wed, 26 Dec 2012 22:11:18 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-12-26T20:57:05Z&apos;, u&apos;name&apos;: u&apos;Ben Becker&apos;, u&apos;email&apos;: u&apos;ben.becker@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7849&quot; title=&quot;manyclients.js failing since switch to V8&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7849&quot;&gt;&lt;del&gt;SERVER-7849&lt;/del&gt;&lt;/a&gt;: enter v8 from a new js thread, and always mark _killPending&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1e48eeab982d385e75ad9a25b5eecd2c93cc1659&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1e48eeab982d385e75ad9a25b5eecd2c93cc1659&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="223010" author="benjamin.becker" created="Mon, 24 Dec 2012 00:14:25 +0000"  >&lt;p&gt;This appears to have exposed an issue with our use of the v8 API in JSThread::operator()().  TLS could be invalid at this point, so I&apos;m not exactly sure how this was expected to work given that we use the same isolate.  This may also be why some of the older builders are more likely to encounter this bug.&lt;/p&gt;</comment>
                            <comment id="221485" author="benjamin.becker" created="Fri, 21 Dec 2012 17:44:36 +0000"  >&lt;p&gt;The smartos failure looks like a ulimit -n issue.&lt;/p&gt;</comment>
                            <comment id="220994" author="ian@10gen.com" created="Fri, 21 Dec 2012 04:28:46 +0000"  >&lt;p&gt;Same test is failing with different error messages on the Nightly Solaris-SmartOS 64-bit builder:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;http://buildlogs.mongodb.org/Nightly%20Solaris-SmartOS%2064-bit/builds/179/test/recent%20failures/manyclients.js&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://buildlogs.mongodb.org/Nightly%20Solaris-SmartOS%2064-bit/builds/179/test/recent%20failures/manyclients.js&lt;/a&gt;&lt;/p&gt;
</comment>
                            <comment id="215133" author="ranman" created="Fri, 14 Dec 2012 17:38:44 +0000"  >&lt;p&gt;changed ulimit on all machines&lt;/p&gt;</comment>
                            <comment id="213160" author="milkie" created="Wed, 12 Dec 2012 16:22:52 +0000"  >&lt;p&gt;There are many limits that ulimit can adjust.  I&apos;m not sure that number is the one that we&apos;re hitting now, but I haven&apos;t really looked into this further yet.&lt;/p&gt;</comment>
                            <comment id="213156" author="ian@10gen.com" created="Wed, 12 Dec 2012 16:18:21 +0000"  >&lt;p&gt;randall has said the ulimit has been raised to 2048 across all OS X machines.  does it need to go higher?&lt;/p&gt;</comment>
                            <comment id="213153" author="milkie" created="Wed, 12 Dec 2012 16:13:21 +0000"  >&lt;p&gt;Might just be ulimit problems at this point.&lt;/p&gt;</comment>
                            <comment id="213150" author="ian@10gen.com" created="Wed, 12 Dec 2012 16:08:51 +0000"  >&lt;p&gt;reopening because OS X DEBUG is still failing at:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;http://buildbot.mongodb.org/builders/OS%20X%2010.5%2064-bit%20DEBUG/builds/1721&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://buildbot.mongodb.org/builders/OS%20X%2010.5%2064-bit%20DEBUG/builds/1721&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="211411" author="auto" created="Mon, 10 Dec 2012 20:27:46 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-12-10T20:27:22Z&apos;, u&apos;name&apos;: u&apos;Ben Becker&apos;, u&apos;email&apos;: u&apos;ben.becker@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7849&quot; title=&quot;manyclients.js failing since switch to V8&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7849&quot;&gt;&lt;del&gt;SERVER-7849&lt;/del&gt;&lt;/a&gt;: fix JSThread read from offset into string literal&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/df1fdd985b7ee3789cda646a3c2f7d42b011f65d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/df1fdd985b7ee3789cda646a3c2f7d42b011f65d&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="57613">SERVER-7773</issuekey>
        </issuelink>
                            </outwardlinks>
                                                        </issuelinktype>
                    </issuelinks>
                <attachments>
                            <attachment id="22187" name="manyclients.js" size="180914" author="ian@mongodb.com" created="Wed, 5 Dec 2012 18:39:56 +0000"/>
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