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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-23345] RAII semantics for ReplicaSetMonitor</title>
                <link>https://jira.mongodb.org/browse/SERVER-23345</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Delegate the cleanup of resources used by ReplicaSetMonitor the do its d-tor. Currently its done in ReplicaSetMonitor::remove() .&lt;/p&gt;

&lt;p&gt;a) Change ReplicaSetMonitorManager _monitors type to StringMap&amp;lt;std::weak_ptr&amp;lt;RepliceSetMonitor&amp;gt;&amp;gt;&lt;br/&gt;
so the map does not own monitors and hence every object will call a d-tor as soon as its refcount is 0&lt;/p&gt;

&lt;p&gt;b) ReplicaSetMonitor::~ReplicaSetMonitor will now be called when it goes out of scope and hence it should erase itself from the _monitors map.&lt;/p&gt;

&lt;p&gt;c) ReplicaSetMonitorManager::getMonitor should &lt;br/&gt;
 lock() a weak_ptr to existing monitor to convert it to shared_ptr() before returning it. It should invariant that lock() works i.e. the map can not have a dangling weak_ptr.&lt;/p&gt;

&lt;p&gt;d) disallow calling ReplicaSetMonitor::remove() - make its private or delete if not needed&lt;/p&gt;

&lt;p&gt;e) Optionally in the case there is need to get a shared_ptr from ReplicaSetMonitor object: derive ReplicaSetMonitor from enable_shared_from_this and use shared_from_this() call to get shared_ptr.&lt;/p&gt;</description>
                <environment></environment>
        <key id="275015">SERVER-23345</key>
            <summary>RAII semantics for ReplicaSetMonitor</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="9">Done</resolution>
                                        <assignee username="misha.tyulenev@mongodb.com">Misha Tyulenev</assignee>
                                    <reporter username="misha.tyulenev@mongodb.com">Misha Tyulenev</reporter>
                        <labels>
                            <label>PM550</label>
                    </labels>
                <created>Fri, 25 Mar 2016 01:48:34 +0000</created>
                <updated>Wed, 28 Sep 2016 18:31:23 +0000</updated>
                            <resolved>Mon, 1 Aug 2016 15:32:54 +0000</resolved>
                                                    <fixVersion>3.3.11</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1343128" author="misha.tyulenev" created="Mon, 1 Aug 2016 15:32:54 +0000"  >&lt;p&gt;The required changes are documented in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23192&quot; title=&quot;mongos and shards will become unusable if contact is lost with all CSRS config server nodes for more than 30 consecutive failed attempts to contact&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23192&quot;&gt;&lt;del&gt;SERVER-23192&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1343098" author="misha.tyulenev" created="Mon, 1 Aug 2016 15:11:48 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23192&quot; title=&quot;mongos and shards will become unusable if contact is lost with all CSRS config server nodes for more than 30 consecutive failed attempts to contact&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23192&quot;&gt;&lt;del&gt;SERVER-23192&lt;/del&gt;&lt;/a&gt; resolved all but d)   RSM::remove and other RSM methods should not be used directly as the shard ownership of RSM (thru the targeter) supposed to take care of the RSM life cycle via RAII and this commit will bring us closer. The problem is the dbclient_rs that owns RSM (directly) so the RSM owned by a removed shard may not be recreated on the ShardRegistry reload.&lt;br/&gt;
Therefore this functionality will be solved in the context of refactoring dbclient_rs.&lt;/p&gt;</comment>
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