<li>Peter gave feedback on the <code>dc.rights</code> proof of concept that I had sent him last week</li>
<li>We don’t need to distinguish between internal and external works, so that makes it just a simple list</li>
<li>Yesterday I figured out how to monitor DSpace sessions using JMX</li>
<li>I copied the logic in the <code>jmx_tomcat_dbpools</code> provided by Ubuntu’s <code>munin-plugins-java</code> package and used the stuff I discovered about JMX <ahref="/cgspace-notes/2018-01/">in 2018-01</a></li>
</ul>
<ahref='https://alanorth.github.io/cgspace-notes/2018-02/'>Read more →</a>
<li>Uptime Robot noticed that CGSpace went down and up a few times last night, for a few minutes each time</li>
<li>I didn’t get any load alerts from Linode and the REST and XMLUI logs don’t show anything out of the ordinary</li>
<li>The nginx logs show HTTP 200s until <code>02/Jan/2018:11:27:17 +0000</code> when Uptime Robot got an HTTP 500</li>
<li>In dspace.log around that time I see many errors like “Client closed the connection before file download was complete”</li>
<li>And just before that I see this:</li>
</ul>
<pretabindex="0"><code>Caused by: org.apache.tomcat.jdbc.pool.PoolExhaustedException: [http-bio-127.0.0.1-8443-exec-980] Timeout: Pool empty. Unable to fetch a connection in 5 seconds, none available[size:50; busy:50; idle:0; lastwait:5000].
</code></pre><ul>
<li>Ah hah! So the pool was actually empty!</li>
<li>I need to increase that, let’s try to bump it up from 50 to 75</li>
<li>After that one client got an HTTP 499 but then the rest were HTTP 200, so I don’t know what the hell Uptime Robot saw</li>
<li>I notice this error quite a few times in dspace.log:</li>
</ul>
<pretabindex="0"><code>2018-01-02 01:21:19,137 ERROR org.dspace.app.xmlui.aspect.discovery.SidebarFacetsTransformer @ Error while searching for sidebar facets
<li>Danny wrote to ask for help renewing the wildcard ilri.org certificate and I advised that we should probably use Let’s Encrypt if it’s just a handful of domains</li>
</ul>
<ahref='https://alanorth.github.io/cgspace-notes/2018-01/'>Read more →</a>
<pretabindex="0"><code>dspace=# \copy (select distinct text_value, count(*) as count from metadatavalue where metadata_field_id = (select metadata_field_id from metadatafieldregistry where element = 'contributor' and qualifier = 'author') AND resource_type_id = 2 group by text_value order by count desc) to /tmp/authors.csv with csv;
<li>Peter emailed to point out that many items in the <ahref="https://cgspace.cgiar.org/handle/10568/2703">ILRI archive collection</a> have multiple handles:</li>
<p>Rough notes for importing the CGIAR Library content. It was decided that this content would go to a new top-level community called <em>CGIAR System Organization</em>.</p>
<ahref='https://alanorth.github.io/cgspace-notes/cgiar-library-migration/'>Read more →</a>
<li>Linode sent an alert that CGSpace (linode18) was using 350% CPU for the past two hours</li>
<li>I looked in the Activity pane of the Admin Control Panel and it seems that Google, Baidu, Yahoo, and Bing are all crawling with massive numbers of bots concurrently (~100 total, mostly Baidu and Google)</li>
<li>The good thing is that, according to <code>dspace.log.2017-08-01</code>, they are all using the same Tomcat session</li>
<li>This means our Tomcat Crawler Session Valve is working</li>
<li>But many of the bots are browsing dynamic URLs like:
<ul>
<li>/handle/10568/3353/discover</li>
<li>/handle/10568/16510/browse</li>
</ul>
</li>
<li>The <code>robots.txt</code> only blocks the top-level <code>/discover</code> and <code>/browse</code> URLs… we will need to find a way to forbid them from accessing these!</li>
<li>Relevant issue from DSpace Jira (semi resolved in DSpace 6.0): <ahref="https://jira.duraspace.org/browse/DS-2962">https://jira.duraspace.org/browse/DS-2962</a></li>
<li>It turns out that we’re already adding the <code>X-Robots-Tag "none"</code> HTTP header, but this only forbids the search engine from <em>indexing</em> the page, not crawling it!</li>
<li>Also, the bot has to successfully browse the page first so it can receive the HTTP header…</li>
<li>We might actually have to <em>block</em> these requests with HTTP 403 depending on the user agent</li>
<li>Abenet pointed out that the CGIAR Library Historical Archive collection I sent July 20th only had ~100 entries, instead of 2415</li>
<li>This was due to newline characters in the <code>dc.description.abstract</code> column, which caused OpenRefine to choke when exporting the CSV</li>
<li>I exported a new CSV from the collection on DSpace Test and then manually removed the characters in vim using <code>g/^$/d</code></li>
<li>Then I cleaned up the author authorities and HTML characters in OpenRefine and sent the file back to Abenet</li>
</ul>
<ahref='https://alanorth.github.io/cgspace-notes/2017-08/'>Read more →</a>
