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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <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>[SERVER-56223] Exception in PrimaryOnlyService::_rebuildService() are silently ignored</title>
                <link>https://jira.mongodb.org/browse/SERVER-56223</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;On step up we rebuild the primary only services by invoking:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/c90de3e65fff76ead7b8ca4664c3f34b0c913e04/src/mongo/db/repl/primary_only_service.cpp#L376&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;PrimaryOnlyService::_rebuildService()&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/c90de3e65fff76ead7b8ca4664c3f34b0c913e04/src/mongo/db/repl/primary_only_service.cpp#L378&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;PrimaryOnlyService::_rebuildInstances(term)&lt;/a&gt;&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;For the exceptions thrown &lt;a href=&quot;https://github.com/mongodb/mongo/blob/c90de3e65fff76ead7b8ca4664c3f34b0c913e04/src/mongo/db/repl/primary_only_service.cpp#L602-L612&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;in the specific try/catch block&lt;/a&gt; of (2) &lt;a href=&quot;https://github.com/mongodb/mongo/blob/c90de3e65fff76ead7b8ca4664c3f34b0c913e04/src/mongo/db/repl/primary_only_service.cpp#L633-L635&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;we correctly set&lt;/a&gt; the POS &lt;tt&gt;_state&lt;/tt&gt; to &lt;tt&gt;kRebuildFailed&lt;/tt&gt; and the &lt;tt&gt;_rebuildStatus&lt;/tt&gt; with the error occurred.&lt;/p&gt;

&lt;p&gt;For all the other exceptions thrown in either (1) or in (2) but outside &lt;a href=&quot;https://github.com/mongodb/mongo/blob/c90de3e65fff76ead7b8ca4664c3f34b0c913e04/src/mongo/db/repl/primary_only_service.cpp#L602-L612&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;that try/catch block&lt;/a&gt; we simply ignore the error. If this happens the POS will remain in the &lt;tt&gt;kRebuilding&lt;/tt&gt; state until the next stepUp, in the meantime all the attempt of creating new instances of that service will simply hang.&lt;/p&gt;

&lt;p&gt;My proposal is to catch all the exceptions thrown in the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/c90de3e65fff76ead7b8ca4664c3f34b0c913e04/src/mongo/db/repl/primary_only_service.cpp#L368-L379&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;rebuild future chain&lt;/a&gt; and to properly set the&#160;&lt;tt&gt;_state&lt;/tt&gt; and the &lt;tt&gt;_rebuildStatus&lt;/tt&gt; accordingly to the error.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Acceptance criteria:&lt;/b&gt;&#160;&lt;/p&gt;

&lt;p&gt;Design a solution for this and provide a more informed LOE.&#160;&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="1685317">SERVER-56223</key>
            <summary>Exception in PrimaryOnlyService::_rebuildService() are silently ignored</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="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-servicearch">Backlog - Service Architecture</assignee>
                                    <reporter username="tommaso.tocci@mongodb.com">Tommaso Tocci</reporter>
                        <labels>
                            <label>sa-remove-fv-backlog-22</label>
                    </labels>
                <created>Wed, 21 Apr 2021 08:46:14 +0000</created>
                <updated>Tue, 6 Dec 2022 01:23:33 +0000</updated>
                                            <version>Backlog</version>
                                                                        <votes>0</votes>
                                    <watches>5</watches>
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