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            <title>[SERVER-81582] Transaction limit can be hit in addShard</title>
                <link>https://jira.mongodb.org/browse/SERVER-81582</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-71755&quot; title=&quot;Emit an oplog entry from an existing shard when a new database is added to the config catalog&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-71755&quot;&gt;&lt;del&gt;SERVER-71755&lt;/del&gt;&lt;/a&gt; added code to insert the shard metadata along with the database metadata and the placement history in a transaction as part of PM-1939, this fixes &lt;tt&gt;addShard&lt;/tt&gt; not registering all the databases if there is a failure in the middle of the write operation, and allows a stable timestamp to get the necessary metadata for change streams, however, a replica set with too many databases could have a similar problem as the one described in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-58433&quot; title=&quot;ReshardingCoordinatorService Transaction In bumpCollectionVersionAndChangeMetadataInTxn Possibly Too Large&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-58433&quot;&gt;&lt;del&gt;SERVER-58433&lt;/del&gt;&lt;/a&gt;, where we reach the limits of the WiredTiger cache size for a transaction.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-79160&quot; title=&quot;Track unsharded collections when adding a shard&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-79160&quot;&gt;&lt;del&gt;SERVER-79160&lt;/del&gt;&lt;/a&gt; adds to that transaction the collections present in the shard, making this problem more probable. We should batch the request in several transactions to mitigate this, until we have a fully reliable &lt;tt&gt;addShard&lt;/tt&gt; which should come in PM-2050.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2454982">SERVER-81582</key>
            <summary>Transaction limit can be hit in addShard</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="1" iconUrl="https://jira.mongodb.org/images/icons/statuses/open.png" description="">Open</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-catalog-and-routing">Backlog - Catalog and Routing</assignee>
                                    <reporter username="marcos.grillo@mongodb.com">Marcos Jos&#233; Grillo Ramirez</reporter>
                        <labels>
                            <label>oldshardingemea</label>
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                <created>Fri, 29 Sep 2023 18:46:58 +0000</created>
                <updated>Wed, 7 Feb 2024 11:30:09 +0000</updated>
                                                                            <component>Sharding</component>
                                        <votes>0</votes>
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