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Add notes for 2020-04-29

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Alan Orth
2020-04-29 17:33:34 +03:00
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@ -25,7 +25,7 @@ On the same note, the one item Abenet pointed out last week now has a donut with
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<meta property="article:modified_time" content="2020-04-29T14:20:28+03:00" />
<meta name="twitter:card" content="summary"/>
<meta name="twitter:title" content="April, 2020"/>
@ -55,9 +55,9 @@ On the same note, the one item Abenet pointed out last week now has a donut with
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"datePublished": "2020-04-02T10:53:24+03:00",
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@ -499,6 +499,39 @@ Caused by: java.lang.NullPointerException
<li>I&rsquo;ve reverted my sweet SVG work from yesterday and adjusted the Font Awesome 5 SCSS to add a few more icons that they are using</li>
</ul>
</li>
<li>Tezira said she was having issues submitting items on CGSpace today
<ul>
<li>I looked at all the errors in the DSpace log and see a few SQL pooling errors around mid day:</li>
</ul>
</li>
</ul>
<pre><code>$ grep ERROR dspace.log.2020-04-29 | cut -f 3- -d' ' | sort | uniq -c | sort -n
1 ERROR org.dspace.storage.rdbms.DatabaseManager @ SQL findByUnique Error -
1 ERROR org.dspace.storage.rdbms.DatabaseManager @ SQL find Error -
1 ERROR org.dspace.storage.rdbms.DatabaseManager @ SQL query singleTable Error -
1 ERROR org.dspace.storage.rdbms.DatabaseManager @ SQL QueryTable Error -
</code></pre><ul>
<li>I looked in Munin and I see that there is a strange spike in the database pool usage this afternoon:</li>
</ul>
<p><img src="/cgspace-notes/2020/04/jmx_tomcat_dbpools-day.png" alt="Tomcat Database Pool usage day"></p>
<ul>
<li>Looking at the past month it does seem to be something strange:</li>
</ul>
<p><img src="/cgspace-notes/2020/04/jmx_tomcat_dbpools-month.png" alt="Tomcat Database Pool usage month"></p>
<ul>
<li>Database connections do seem high:</li>
</ul>
<pre><code>$ psql -c 'select * from pg_stat_activity' | grep -o -E '(dspaceWeb|dspaceApi|dspaceCli)' | sort | uniq -c
5 dspaceApi
6 dspaceCli
88 dspaceWeb
</code></pre><ul>
<li>Most of those are idle in transaction:</li>
</ul>
<pre><code>$ psql -c 'select * from pg_stat_activity' | grep 'dspaceWeb' | grep -c &quot;idle in transaction&quot;
67
</code></pre><ul>
<li>I don&rsquo;t see anything in the PostgreSQL or Tomcat logs suggesting anything is wrong&hellip; I think the solution to clear these idle connections is probably to just restart Tomcat</li>
</ul>
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