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<channel>
    <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>
    </build-info>


<item>
            <title>[SERVER-54723] Shorten resmoke log prefixes</title>
                <link>https://jira.mongodb.org/browse/SERVER-54723</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Log lines (particularly when run through resmoke) have been and are getting longer. The new information we want to add is useful (e.g: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50085&quot; title=&quot;Make it easier to correlate mongo process names, ports, PIDs in logs of fixtures started by resmoke&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50085&quot;&gt;&lt;del&gt;TIG-1791&lt;/del&gt;&lt;/a&gt;), but it comes at a cost. This ticket is to start a conversation to explore what can be done to reduce the need to scroll to the right.&lt;/p&gt;

&lt;p&gt;The current log lines outputs the following information (as an example, not all log lines are the same):&lt;br/&gt;
a fixture, a job number, node identification, a timestamp, log level, loggger name, thread name, log message&lt;/p&gt;
&lt;p/&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[ReplicaSetFixture:job9:primary] 2019-07-02T02:09:03.027+0000 I  INDEX    [conn98] validated collection config.transactions (UUID: f6c6dde1-fc12-4608-b439-c09508cfee9e)&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;One workflow I have when debugging a failure in the server (as opposed to an unexpected response):&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;First find the failure (requires looking at the contents of the log message).&lt;/li&gt;
	&lt;li&gt;Look at which job/node the failure came from&lt;/li&gt;
	&lt;li&gt;Add a filter based on job/node identification&lt;/li&gt;
	&lt;li&gt;Filter out unrelated spammy loggers (for execution related failures that&apos;s often all of replication, and service arch logs)&lt;/li&gt;
	&lt;li&gt;Scan the log statements&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;Information like the job and loggers are necessary for filtering, but not looking at. The fixture name and log level are always irrelevant to me. The thread name, log message and at times, the timestamp (more for temporal locality or cross referencing) are most important. Node identification is sometimes only needed for filtering, and sometimes needed because I need to look at messages from multiple nodes simultaneously. Lobster coloring is often a sufficient for distinguishing between nodes in this case.&lt;/p&gt;

&lt;p&gt;Common refrains in execution standups when going over new BFs that have come in (where the BB has already done an excellent job picking out the relevant log lines) are: &quot;Scroll to the right &lt;span class=&quot;error&quot;&gt;&amp;#91;please&amp;#93;&lt;/span&gt;&quot; and &quot;keep going...&quot;&lt;/p&gt;</description>
                <environment></environment>
        <key id="1424851">SERVER-54723</key>
            <summary>Shorten resmoke log prefixes</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="13201">Fixed</resolution>
                                        <assignee username="mikhail.shchatko@mongodb.com">Mikhail Shchatko</assignee>
                                    <reporter username="daniel.gottlieb@mongodb.com">Daniel Gottlieb</reporter>
                        <labels>
                            <label>tig-qwin-eligible</label>
                            <label>tig-resmoke</label>
                    </labels>
                <created>Thu, 30 Jul 2020 15:46:16 +0000</created>
                <updated>Sun, 29 Oct 2023 21:57:08 +0000</updated>
                            <resolved>Fri, 5 Mar 2021 07:12:52 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                    <component>Testing Infrastructure</component>
                                        <votes>0</votes>
                                    <watches>10</watches>
                                                                                                                <comments>
                            <comment id="3647908" author="xgen-internal-githook" created="Thu, 4 Mar 2021 21:05:49 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Mikhail Shchatko&apos;, &apos;email&apos;: &apos;mikhail.shchatko@mongodb.com&apos;, &apos;username&apos;: &apos;MikhailShchatko&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-54723&quot; title=&quot;Shorten resmoke log prefixes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-54723&quot;&gt;&lt;del&gt;SERVER-54723&lt;/del&gt;&lt;/a&gt; Shorten resmoke log prefixes&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8022d8830d9bdec5f0bfe3fd82aee7ebc50c5a47&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8022d8830d9bdec5f0bfe3fd82aee7ebc50c5a47&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3644582" author="robert.guo" created="Wed, 3 Mar 2021 16:15:44 +0000"  >&lt;p&gt;Got it &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=david.bradford&quot; class=&quot;user-hover&quot; rel=&quot;david.bradford&quot;&gt;david.bradford&lt;/a&gt;, I&apos;ll set something up.&lt;/p&gt;</comment>
                            <comment id="3644572" author="david.bradford" created="Wed, 3 Mar 2021 16:11:30 +0000"  >&lt;p&gt;Would be possible for someone to sync up with me before this gets merged? This will likely break the log parsing that we do for BFGs and BF suggestions.&lt;/p&gt;</comment>
                            <comment id="3637320" author="mikhail.shchatko" created="Fri, 26 Feb 2021 16:49:44 +0000"  >&lt;p&gt;After having conversation in slack with &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=daniel.gottlieb&quot; class=&quot;user-hover&quot; rel=&quot;daniel.gottlieb&quot;&gt;daniel.gottlieb&lt;/a&gt; and &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=robert.guo&quot; class=&quot;user-hover&quot; rel=&quot;robert.guo&quot;&gt;robert.guo&lt;/a&gt; we decided to do the following changes:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;remove resmoke timestamps&lt;/li&gt;
	&lt;li&gt;shortening resmoke prefixes using specific abbreviations:&lt;br/&gt;
 job -&amp;gt; j&lt;br/&gt;
 shard -&amp;gt; s&lt;br/&gt;
 primary -&amp;gt; prim&lt;br/&gt;
 secondary -&amp;gt; sec&lt;br/&gt;
 mongos -&amp;gt; s (this collides with &quot;shard&quot;, but probably this is not ambiguous)&lt;br/&gt;
 node -&amp;gt; n&lt;br/&gt;
 configsvr -&amp;gt; c&lt;/li&gt;
	&lt;li&gt;remove MongoDFixture, ReplicaSetFixture, ShardedClusterFixture&lt;/li&gt;
	&lt;li&gt;update fixture tables:&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;old&lt;/p&gt;
&lt;p/&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;|ShardedClusterFixture:job1:shard0:primary   |20251|19044|&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;|ShardedClusterFixture:job1:configsvr:primary|20250|18478|&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;+--------------------------------------------+-----+-----+&lt;/span&gt;&lt;/pre&gt;
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&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;new&lt;/p&gt;
&lt;p/&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;|ShardedClusterFixture:job1:shard0:primary   |j1:s0:prim|20251|10943|&lt;/span&gt;&lt;/pre&gt;
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&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</comment>
                            <comment id="3428308" author="robert.guo" created="Tue, 6 Oct 2020 14:51:27 +0000"  >&lt;p&gt;Nope. We&apos;re going to try to get to it in our next quick wins bucket.&lt;/p&gt;</comment>
                            <comment id="3405486" author="brooke.miller" created="Tue, 22 Sep 2020 16:04:20 +0000"  >&lt;p&gt;Is this still waiting for user input, &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=robert.guo&quot; class=&quot;user-hover&quot; rel=&quot;robert.guo&quot;&gt;robert.guo&lt;/a&gt;?&lt;/p&gt;</comment>
                            <comment id="3319623" author="robert.guo" created="Tue, 4 Aug 2020 15:23:37 +0000"  >&lt;p&gt;Try to do as much as we can in resmoke and not touch the Server for this ticket.&lt;/p&gt;

&lt;p&gt;1. update timestamp format, 2. shortening static prefixes, reduce spacings.&lt;/p&gt;</comment>
                            <comment id="3319610" author="brooke.miller" created="Tue, 4 Aug 2020 15:20:22 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=robert.guo&quot; class=&quot;user-hover&quot; rel=&quot;robert.guo&quot;&gt;robert.guo&lt;/a&gt;&#160;to do the initial investigation with stakeholders about their preference.&lt;/p&gt;</comment>
                            <comment id="3319604" author="brooke.miller" created="Tue, 4 Aug 2020 15:19:27 +0000"  >&lt;p&gt;In Triaging, we agreed that the last suggestion is the best route for implementation. However, we should modify the timestamp format to include colons. Before we go ahead and implement this, we should get this in front of stakeholders to make sure the majority would be OK with this change.&lt;/p&gt;</comment>
                            <comment id="3314166" author="ryan.timmons" created="Thu, 30 Jul 2020 16:48:51 +0000"  >&lt;p&gt;Strategies I&apos;ve used very successfully in the past:&lt;/p&gt;

&lt;ol&gt;
	&lt;li&gt;use jargon and obvious shortenings for common things (e.g. Replica -&amp;gt; Repl, Fixture -&amp;gt; Fxr)&lt;/li&gt;
	&lt;li&gt;Remove vowels after the first one and repeated consonants; remove &quot;double-hard&quot; consonants (Fixture -&amp;gt; Fixr; conn -&amp;gt; cn)&lt;/li&gt;
	&lt;li&gt;Pipes instead of balanced brackets&lt;/li&gt;
	&lt;li&gt;Remove extraneous date separators and always encode as Zulu (Z) time rather than offset&lt;/li&gt;
	&lt;li&gt;Reduce padding so it it&apos;s only needed in &amp;lt; 50% of cases&lt;/li&gt;
&lt;/ol&gt;


&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[ReplicaSetFixture:job9:primary] 2019-07-02T02:09:03.027+0000 I  INDEX    [conn98] validated collection config.transactions (UUID: f6c6dde1-fc12-4608-b439-c09508cfee9e)&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;Becomes:&lt;/p&gt;

&lt;p/&gt;
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&lt;p&gt;This cuts 84 chars of prefix down to 58 while still being, imho, just as mentally obvious when reading it. And we&apos;ve not made it any less machine-parsable either.&lt;/p&gt;

&lt;p&gt;Some would go a step further and say the date info isn&apos;t useful, separators aren&apos;t needed, and Zulu can be implied:&lt;/p&gt;

&lt;p/&gt;
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&lt;p/&gt;

&lt;p&gt;This veers away from any sort of ISO-8601 format but it saves another 13 characters of what is noise in nearly all cases.&lt;/p&gt;

&lt;p&gt;At any rate it seems reasonable to establish a stable regex so that lobster and other tooling can reliably expand or hide the data the user doesn&apos;t care about. In projects I&apos;ve worked on in the past we&apos;ve had a published PCRE that describes log-lines and we &quot;required&quot; all projects that parsed logs make reference to the file so we could easily find all the places that used the regex whenever we needed to change it. This saved us a production outage when we switched from offsets (+000) to Zulu, so it paid off.&lt;/p&gt;</comment>
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