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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-42990] Is PCRE 8.43 bug a production concern?</title>
                <link>https://jira.mongodb.org/browse/SERVER-42990</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Apologies for creating a new bug.&#160; This is really a follow-up on &quot;Upgrade PCRE to 8.43&quot; at &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40836&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-40836&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;My most recent comment on a different but already closed bug hasn&apos;t gotten a response, so I&apos;m not sure if it&apos;s just been missed or if like on many bugtrackers that closed bugs never get looked at again.&#160; See &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32773&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-32773&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Anyways, does this PCRE 8.43 bug merely cause a mongodb test to fail?&#160; Should the failure just be ignored?&lt;/p&gt;

&lt;p&gt;Or, does this mean that PCRE 8.43 shouldn&apos;t be used in production with mongodb?&lt;/p&gt;

&lt;p&gt;As the packager of mongodb in the Arch Linux AUR repository, need to know what to do here.&#160; We&apos;ve always compiled with &quot;--use-system-pcre&quot; and we&apos;re running the latest version of PCRE, 8.43.&lt;/p&gt;

&lt;p&gt;As half of the &quot;&amp;#45;-use-system-X&quot; flags seem to be currently broken and disabled, and with how frequently they change, I&apos;m starting to wonder if any of them are trustworthy, or if we just need to shrug and sigh, and let mongodb pull in all of its dependencies by source.&lt;/p&gt;

&lt;p&gt;(Currently using system pcre, snappy, yaml, zlib, stemmer, sasl-client, and tcmalloc.&#160; system wiredtiger, asio, icu, boost, and surprisingly mongo-c are broken.)&lt;/p&gt;</description>
                <environment></environment>
        <key id="904597">SERVER-42990</key>
            <summary>Is PCRE 8.43 bug a production concern?</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="13202">Works as Designed</resolution>
                                        <assignee username="mathew.robinson@mongodb.com">Mathew Robinson</assignee>
                                    <reporter username="jamespharvey20">James P. Harvey</reporter>
                        <labels>
                    </labels>
                <created>Fri, 23 Aug 2019 10:19:21 +0000</created>
                <updated>Fri, 27 Oct 2023 13:53:06 +0000</updated>
                            <resolved>Mon, 26 Aug 2019 20:50:14 +0000</resolved>
                                    <version>4.2.0</version>
                                                    <component>Build</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="2387296" author="mathew.robinson" created="Mon, 26 Aug 2019 20:50:14 +0000"  >&lt;p&gt;Hey &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jamespharvey20&quot; class=&quot;user-hover&quot; rel=&quot;jamespharvey20&quot;&gt;jamespharvey20&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;I hope the above answers your question. Since we&apos;re waiting for PCRE 8.44 to do an upgrade I&apos;m going to close this as Works as Designed.&lt;/p&gt;

&lt;p&gt;As the Arch packager I leave it up to you to decide if the one edge case that can cause a crash with PCRE 8.43 is worth using the system library or not.&lt;/p&gt;</comment>
                            <comment id="2386497" author="mathew.robinson" created="Mon, 26 Aug 2019 14:10:09 +0000"  >&lt;p&gt;If PCRE 8.43 is used without the fix then the &lt;tt&gt;(*LF)&lt;/tt&gt; prefix option in a $regex query would cause the database to throw a DBException. I would consider this a production problem, but I have no way to know if that prefix option is widely used.&lt;/p&gt;</comment>
                            <comment id="2384131" author="acm" created="Fri, 23 Aug 2019 13:05:35 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jamespharvey20&quot; class=&quot;user-hover&quot; rel=&quot;jamespharvey20&quot;&gt;jamespharvey20&lt;/a&gt; - Regarding your mention of a comment on &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32773&quot; title=&quot;mlock: Operation not permitted&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32773&quot;&gt;&lt;del&gt;SERVER-32773&lt;/del&gt;&lt;/a&gt; - I&apos;d generally advise against leaving follow-up comments on a closed ticket, except if you think that the issue was not actually fixed and that it should be re-opened. In general, it is better to open new tickets - there is a system in place for triage of new tickets, but not so much for comments on closed. Also, for things that are more like a discussion or set of questions (say, regarding the issues around the &lt;tt&gt;&amp;#45;&amp;#45;use-system&amp;#45;&lt;/tt&gt; flags that you and I have talked about a few times), I&apos;d also recommend starting out with an email to the moderated group &lt;a href=&quot;https://groups.google.com/forum/#!forum/mongodb-dev&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://groups.google.com/forum/#!forum/mongodb-dev&lt;/a&gt;. That way, we can have a conversation around the issue before deciding on if tickets should be filed.&lt;/p&gt;</comment>
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            <issuekey id="1302226">SERVER-47278</issuekey>
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