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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-48100] &quot;mongo&quot; command line in 4.4.0-rc[0-5] prints TCP Fast Open warning to stdout</title>
                <link>https://jira.mongodb.org/browse/SERVER-48100</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In versions before 4.4, we&apos;ve been using `mongo --quiet --eval &apos;...&apos;` as a way to run simple Javascript expressions against a MongoDB instance for querying in shell scripts, and that has been very successful and prior to 4.4 the output to standard output (which is then capturable in the shell script) has been limited to just the result of the expression (`db.test.count()` would return just a single number, etc).&lt;/p&gt;

&lt;p&gt;In 4.4 (following &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-44676&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-44676&lt;/a&gt; &amp;amp; &lt;a href=&quot;https://github.com/mongodb/mongo/commit/8189e058304baa734ea892b69c37d16021e17a2f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8189e058304baa734ea892b69c37d16021e17a2f&lt;/a&gt;), this behavior changed such that we get an additional (unexpected) warning to standard output about TCP Fast Open, and the warning itself comes in Javascript format, presumably because it was intended for output to the daemon logs (where it also appears on 4.4+):&lt;/p&gt;
&lt;p/&gt;
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&lt;p/&gt;
&lt;p&gt;Now, we can use something like `grep` to ignore the warning, but IMO it should probably either go to standard error instead, or not show up in the output of the `mongo` CLI tool at all (especially when using `--quiet`). &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/biggrin.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="1346860">SERVER-48100</key>
            <summary>&quot;mongo&quot; command line in 4.4.0-rc[0-5] prints TCP Fast Open warning to stdout</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="3">Duplicate</resolution>
                                        <assignee username="sara.golemon@mongodb.com">Sara Golemon</assignee>
                                    <reporter username="tianon">Tianon Gravi</reporter>
                        <labels>
                    </labels>
                <created>Mon, 11 May 2020 18:13:18 +0000</created>
                <updated>Wed, 27 May 2020 20:22:05 +0000</updated>
                            <resolved>Wed, 27 May 2020 20:22:05 +0000</resolved>
                                    <version>4.4.0-rc0</version>
                    <version>4.4.0-rc5</version>
                                                    <component>Logging</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="3132471" author="sara.golemon" created="Wed, 27 May 2020 20:21:31 +0000"  >&lt;p&gt;Hah! Yep. I was just on my way back here to report the same.&lt;/p&gt;

&lt;p&gt;Closing as duplicate. Thanks again for the report though!&lt;/p&gt;</comment>
                            <comment id="3126194" author="tianon" created="Wed, 27 May 2020 17:14:57 +0000"  >&lt;p&gt;It appears that this has been fixed in 4.4.0-rc7, and looking through the commits I found &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46932&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-46932&lt;/a&gt; which I&apos;m fairly sure this one is actually a duplicate of.&#160;&lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/biggrin.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/p&gt;</comment>
                            <comment id="3079672" author="thomas.schubert" created="Mon, 11 May 2020 21:27:02 +0000"  >&lt;p&gt;Thank you for the report, &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=tianon&quot; class=&quot;user-hover&quot; rel=&quot;tianon&quot;&gt;tianon&lt;/a&gt;!&lt;/p&gt;</comment>
                            <comment id="3079357" author="ryan.chipman" created="Mon, 11 May 2020 19:16:23 +0000"  >&lt;p&gt;moving to the SERVER project, since &lt;tt&gt;mongo&lt;/tt&gt; is not part of the DB tools&lt;/p&gt;</comment>
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