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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>[CSHARP-4603] Investigate whether ZstdSharp.Port is affected by Zstd block splitter bug</title>
                <link>https://jira.mongodb.org/browse/CSHARP-4603</link>
                <project id="10041" key="CSHARP">C# Driver</project>
                    <description>&lt;p&gt;Zstd reported a &lt;a href=&quot;https://github.com/facebook/zstd/pull/3517&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;bug in its block splitter&lt;/a&gt;. Since .NET/C# Driver v2.18.0, the driver uses a managed implementation &lt;a href=&quot;https://github.com/oleg-st/ZstdSharp&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;ZstdSharp.Port&lt;/a&gt;, which is a C# port of the C implementation. We currently depend on ZstdSharp.Port 0.6.2. The recently released version 0.7.0 implements Zstd v1.5.4, which is affected by the bug. Zstd fixed the bug in v1.5.5. Thus it is possible that the C# impl is also affected by this bug.&lt;/p&gt;

&lt;p&gt;We should confirm that ZstdSharp.Port 0.6.2 and 0.7.0 are affected by the block splitter bug and if so file a &lt;a href=&quot;https://github.com/oleg-st/ZstdSharp/issues&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;GitHub issue with the ZstdSharp.Port project&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2307783">CSHARP-4603</key>
            <summary>Investigate whether ZstdSharp.Port is affected by Zstd block splitter bug</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="10300" iconUrl="https://jira.mongodb.org/images/icons/priorities/medium.svg">Unknown</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="james.kovacs@mongodb.com">James Kovacs</assignee>
                                    <reporter username="james.kovacs@mongodb.com">James Kovacs</reporter>
                        <labels>
                    </labels>
                <created>Wed, 5 Apr 2023 18:34:32 +0000</created>
                <updated>Wed, 5 Apr 2023 19:10:10 +0000</updated>
                            <resolved>Wed, 5 Apr 2023 19:10:10 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="5327869" author="james.kovacs" created="Wed, 5 Apr 2023 19:10:10 +0000"  >&lt;p&gt;Won&apos;t fix because we use a hard-coded compression level 6, which is unaffected by the Zstd block splitter bug.&lt;/p&gt;</comment>
                            <comment id="5327868" author="james.kovacs" created="Wed, 5 Apr 2023 19:09:06 +0000"  >&lt;p&gt;We currently use a default compression level of 6, which is unaffected by the block splitter bug. We do not provide a mechanism to alter the default compression level. So the driver is unaffected by the Zstd block splitter bug. I have filed an &lt;a href=&quot;https://github.com/oleg-st/ZstdSharp/issues/18&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;issue with ZstdSharp.Port&lt;/a&gt; to address the bug. We can pull in the fix if we ever decide to support user-configurable compression levels.&lt;/p&gt;</comment>
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