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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>[CSHARP-3048] RetryableWrites are only supported if session Id has a value</title>
                <link>https://jira.mongodb.org/browse/CSHARP-3048</link>
                <project id="10041" key="CSHARP">C# Driver</project>
                    <description>&lt;p&gt;Certain server versions have an issue that can result in some mongos instances reporting a value for `LogicalSessionTimeoutMinutes` in the `isMaster` reply while other instances of mongos do not.&lt;/p&gt;

&lt;p&gt;The C# driver currently assumes that all mongos instances would be consistent in either reporting or not reporting a value for `LogicalSessionTimeoutMinutes`.&lt;/p&gt;

&lt;p&gt;When some mongos instances report a `LogicalSessionTimeoutMinutes` and some don&apos;t the driver gets confused and retryable writes fail because:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;It determines sessions are not supported because some mongos instances are missing &apos;LogicalSessionTimeoutMinutes` and will not include an &quot;lsid&quot; in the command&lt;/li&gt;
	&lt;li&gt;But if a write operation is the routed to a mongos that &lt;b&gt;does&lt;/b&gt; report `LogicalSessionTimeoutMinutes` it will conclude that retryable writes are suported and will include a &quot;txnNumber&quot; in the command&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;This results in an error from the server:&lt;/p&gt;

&lt;p&gt;Command insert failed: Transaction number requires a sessionId to be specified.&lt;/p&gt;

&lt;p&gt;The C# driver needs to workaround this server anomaly by verifying that session Id has a value before attempting a retryable write.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="1308804">CSHARP-3048</key>
            <summary>RetryableWrites are only supported if session Id has a value</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</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="13201">Fixed</resolution>
                                        <assignee username="robert@mongodb.com">Robert Stam</assignee>
                                    <reporter username="robert@mongodb.com">Robert Stam</reporter>
                        <labels>
                    </labels>
                <created>Wed, 8 Apr 2020 22:11:15 +0000</created>
                <updated>Sat, 28 Oct 2023 11:48:19 +0000</updated>
                            <resolved>Mon, 13 Apr 2020 16:38:12 +0000</resolved>
                                    <version>2.10.3</version>
                                    <fixVersion>2.10.4</fixVersion>
                                    <component>Write Operations</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="3037120" author="xgen-internal-githook" created="Mon, 13 Apr 2020 16:37:15 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;rstam&apos;, &apos;email&apos;: &apos;robert@robertstam.org&apos;, &apos;username&apos;: &apos;rstam&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CSHARP-3048&quot; title=&quot;RetryableWrites are only supported if session Id has a value&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CSHARP-3048&quot;&gt;&lt;del&gt;CSHARP-3048&lt;/del&gt;&lt;/a&gt;: RetryableWrites are only supported if session Id has a value.&lt;br/&gt;
Branch: v2.10.x&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-csharp-driver/commit/933dae43271d458cfe0b518465d9b5811a1decb6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-csharp-driver/commit/933dae43271d458cfe0b518465d9b5811a1decb6&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3037113" author="xgen-internal-githook" created="Mon, 13 Apr 2020 16:35:12 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;rstam&apos;, &apos;email&apos;: &apos;robert@robertstam.org&apos;, &apos;username&apos;: &apos;rstam&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CSHARP-3048&quot; title=&quot;RetryableWrites are only supported if session Id has a value&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CSHARP-3048&quot;&gt;&lt;del&gt;CSHARP-3048&lt;/del&gt;&lt;/a&gt;: RetryableWrites are only supported if session Id has a value.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-csharp-driver/commit/92bdb716dfbd6448592d4b51e4171c767eedebbe&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-csharp-driver/commit/92bdb716dfbd6448592d4b51e4171c767eedebbe&lt;/a&gt;&lt;/p&gt;</comment>
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