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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[JAVA-597] Update semaphore limit if connectionsPerHost or threadsAllowedToBlockForConnectionMultiplier changed after construction</title>
                <link>https://jira.mongodb.org/browse/JAVA-597</link>
                <project id="10006" key="JAVA">Java Driver</project>
                    <description>&lt;p&gt;User reports writing:&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;
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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;Mongo mongo = new Mongo(&quot;127.0.0.1&quot;, 27017);&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;mongo.getMongoOptions().connectionsPerHost = 100;&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;mongo.getMongoOptions().threadsAllowedToBlockForConnectionMultiplier = 5;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;p/&gt;

&lt;p&gt;... and then spinning up 100 threads, getting &quot;out of semaphores&quot; error. If options are set &lt;b&gt;before&lt;/b&gt; constructing the Mongo instance, semaphore limit is large, as expected. Semaphore limit should be updated after construction if connectionsPerHost or threadsAllowedToBlockForConnectionMultiplier changes.&lt;/p&gt;</description>
                <environment></environment>
        <key id="43558">JAVA-597</key>
            <summary>Update semaphore limit if connectionsPerHost or threadsAllowedToBlockForConnectionMultiplier changed after construction</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="-1">Unassigned</assignee>
                                    <reporter username="jesse@mongodb.com">A. Jesse Jiryu Davis</reporter>
                        <labels>
                    </labels>
                <created>Fri, 6 Jul 2012 16:33:46 +0000</created>
                <updated>Tue, 5 Dec 2017 15:37:14 +0000</updated>
                            <resolved>Tue, 25 Jun 2013 03:52:21 +0000</resolved>
                                    <version>2.7.3</version>
                                                    <component>Connection Management</component>
                                        <votes>1</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="366988" author="jeff.yemin" created="Tue, 25 Jun 2013 03:52:21 +0000"  >&lt;p&gt;Settings should be immutable, so closing this.&lt;/p&gt;</comment>
                            <comment id="142375" author="jeff.yemin" created="Thu, 12 Jul 2012 15:54:13 +0000"  >&lt;p&gt;There may be some demand for this, but I wouldn&apos;t implement it this way.&lt;/p&gt;</comment>
                            <comment id="142330" author="scotthernandez" created="Thu, 12 Jul 2012 14:14:12 +0000"  >&lt;p&gt;Yes, not sure this one should be fixed at all; or we could just make the calculation dynamic in the pool code.&lt;/p&gt;</comment>
                            <comment id="142327" author="jeff.yemin" created="Thu, 12 Jul 2012 13:58:21 +0000"  >&lt;p&gt;It may be, but it&apos;s typical for classes to make copies of non-immutable constructor arguments.  Clients shouldn&apos;t be relying on Mongo instances not doing that for MongoOptions.&lt;/p&gt;</comment>
                            <comment id="142280" author="scotthernandez" created="Thu, 12 Jul 2012 12:14:36 +0000"  >&lt;p&gt;It is desirable to make changed to (some of) those setting dynamically.&lt;/p&gt;</comment>
                            <comment id="140390" author="jeff.yemin" created="Fri, 6 Jul 2012 16:59:25 +0000"  >&lt;p&gt;It would have been better if MongoOptions were immutable.&lt;/p&gt;</comment>
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