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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>[CDRIVER-752] Server selection times out immediately on Solaris</title>
                <link>https://jira.mongodb.org/browse/CDRIVER-752</link>
                <project id="10030" key="CDRIVER">C Driver</project>
                    <description>&lt;p&gt;In 1.2.0-dev, mongoc_topology_select is responsible for selecting a server from your deployment for an operation. In pooled clients, if mongoc_topology_select doesn&apos;t know of a suitable server, it uses a condition variable to wait up to serverSelectionTimeoutMS for the monitor thread to discover one.&lt;/p&gt;

&lt;p&gt;To use pthread_cond_wait, the driver begins by calculating the current time in milliseconds since the epoch:&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;
&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;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;   struct timeval tv;&lt;/span&gt;&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;   int64_t msec;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&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;
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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;   bson_gettimeofday (&amp;amp;tv);&lt;/span&gt;&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;   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;   msec = (tv.tv_sec * 1000) + (tv.tv_usec / 1000) + timeout_msec;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;This works on platforms where tv_sec is a 64-bit int, but on Solaris it&apos;s 32 bits and overflows. (These days, representing tv_sec requires 31 bits, so multiplying it by 1000 overflows.)&lt;/p&gt;

&lt;p&gt;The driver constructs a negative timespec from this calculation and passes it to pthread_cond_wait, which returns EINVAL and mongoc_topology_select quits.&lt;/p&gt;</description>
                <environment>Solaris 11, x86_64</environment>
        <key id="217392">CDRIVER-752</key>
            <summary>Server selection times out immediately on Solaris</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="jesse@mongodb.com">A. Jesse Jiryu Davis</assignee>
                                    <reporter username="jesse@mongodb.com">A. Jesse Jiryu Davis</reporter>
                        <labels>
                    </labels>
                <created>Fri, 17 Jul 2015 14:39:51 +0000</created>
                <updated>Mon, 25 Jul 2016 21:55:04 +0000</updated>
                            <resolved>Tue, 21 Jul 2015 16:36:13 +0000</resolved>
                                    <version>1.2.0</version>
                                    <fixVersion>1.2-beta0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="1334895" author="jesse" created="Mon, 25 Jul 2016 21:55:04 +0000"  >&lt;p&gt;Could be related to &lt;a href=&quot;https://jira.mongodb.org/browse/CDRIVER-1305&quot; title=&quot;Some tests hang on 32-bit Unix&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CDRIVER-1305&quot;&gt;&lt;del&gt;CDRIVER-1305&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="971144" author="jesse" created="Tue, 21 Jul 2015 16:36:13 +0000"  >&lt;p&gt;No need for backport, mongoc_cond_timedwait is only in 1.2.&lt;/p&gt;</comment>
                            <comment id="971143" author="xgen-internal-githook" created="Tue, 21 Jul 2015 16:35:44 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;ajdavis&apos;, u&apos;name&apos;: u&apos;A. Jesse Jiryu Davis&apos;, u&apos;email&apos;: u&apos;jesse@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CDRIVER-752&quot; title=&quot;Server selection times out immediately on Solaris&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CDRIVER-752&quot;&gt;&lt;del&gt;CDRIVER-752&lt;/del&gt;&lt;/a&gt; int overflow in mongoc_cond_timedwait&lt;/p&gt;

&lt;p&gt;On Solaris, at least, timeval.tv_sec is 32 bits. Cast to int64_t before&lt;br/&gt;
multiplying by 1000 to avoid overflow when converting from seconds to ms.&lt;br/&gt;
Branch: 1.2.0-dev&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-c-driver/commit/73a3693685cb640fc40f42f3aeb66b95368be014&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-c-driver/commit/73a3693685cb640fc40f42f3aeb66b95368be014&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="289190">CDRIVER-1305</issuekey>
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