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Update notes for 2019-03-24
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@ -698,4 +698,18 @@ org.postgresql.util.PSQLException: This statement has been closed.
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- I compiled this [TomcatJdbcConnectionTest](https://github.com/gnosly/TomcatJdbcConnectionTest) and created a bunch of database connections and waited a few minutes but they never got abandoned until I created over `maxActive` (75), after which almost all were purged at once
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- So perhaps our settings are not working right, but at least I know the logging works now...
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## 2019-03-24
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- I did some more tests with the [TomcatJdbcConnectionTest](https://github.com/gnosly/TomcatJdbcConnectionTest) thing and while monitoring the number of active connections in jconsole and after adjusting the limits quite low I eventually saw some connections get abandoned
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- I forgot that to connect to a remote JMX session with jconsole you need to use a dynamic SSH SOCKS proxy (as I originally [discovered in 2017-11]({{< relref "2017-11.md" >}}):
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```
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$ jconsole -J-DsocksProxyHost=localhost -J-DsocksProxyPort=3000 service:jmx:rmi:///jndi/rmi://localhost:5400/jmxrmi -J-DsocksNonProxyHosts=
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```
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- I need to remember to check the active connections next time we have issues with blank item pages on CGSpace
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- In other news, I've been running G1GC on DSpace Test (linode19) since 2018-11-08 without realizing it, which is probably a good thing
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- I deployed the latest `5_x-prod` branch on CGSpace (linode18) and added more validation to the JDBC pool in our Tomcat config
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- This includes the new `testWhileIdle` and `testOnConnect` pool settings as well as the two new JDBC interceptors: `StatementFinalizer` and `ConnectionState` that should hopefully make sure our connections in the pool are valid
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<!-- vim: set sw=2 ts=2: -->
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@ -25,7 +25,7 @@ I think I will need to ask Udana to re-copy and paste the abstracts with more ca
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<meta property="og:type" content="article" />
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<meta property="og:url" content="https://alanorth.github.io/cgspace-notes/2019-03/" />
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<meta property="article:published_time" content="2019-03-01T12:16:30+01:00"/>
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<meta property="article:modified_time" content="2019-03-23T12:50:02+02:00"/>
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<meta property="article:modified_time" content="2019-03-24T09:20:19+02:00"/>
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<meta name="twitter:card" content="summary"/>
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<meta name="twitter:title" content="March, 2019"/>
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@ -55,9 +55,9 @@ I think I will need to ask Udana to re-copy and paste the abstracts with more ca
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"@type": "BlogPosting",
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"headline": "March, 2019",
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"url": "https://alanorth.github.io/cgspace-notes/2019-03/",
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"wordCount": "4332",
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"wordCount": "4494",
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"datePublished": "2019-03-01T12:16:30+01:00",
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"dateModified": "2019-03-23T12:50:02+02:00",
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"dateModified": "2019-03-24T09:20:19+02:00",
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"author": {
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"@type": "Person",
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"name": "Alan Orth"
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@ -944,6 +944,26 @@ org.postgresql.util.PSQLException: This statement has been closed.
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</ul></li>
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</ul>
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<h2 id="2019-03-24">2019-03-24</h2>
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<ul>
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<li>I did some more tests with the <a href="https://github.com/gnosly/TomcatJdbcConnectionTest">TomcatJdbcConnectionTest</a> thing and while monitoring the number of active connections in jconsole and after adjusting the limits quite low I eventually saw some connections get abandoned</li>
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<li>I forgot that to connect to a remote JMX session with jconsole you need to use a dynamic SSH SOCKS proxy (as I originally <a href="/cgspace-notes/2017-11/">discovered in 2017-11</a>:</li>
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</ul>
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<pre><code>$ jconsole -J-DsocksProxyHost=localhost -J-DsocksProxyPort=3000 service:jmx:rmi:///jndi/rmi://localhost:5400/jmxrmi -J-DsocksNonProxyHosts=
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</code></pre>
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<ul>
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<li>I need to remember to check the active connections next time we have issues with blank item pages on CGSpace</li>
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<li>In other news, I’ve been running G1GC on DSpace Test (linode19) since 2018-11-08 without realizing it, which is probably a good thing</li>
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<li>I deployed the latest <code>5_x-prod</code> branch on CGSpace (linode18) and added more validation to the JDBC pool in our Tomcat config
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<ul>
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<li>This includes the new <code>testWhileIdle</code> and <code>testOnConnect</code> pool settings as well as the two new JDBC interceptors: <code>StatementFinalizer</code> and <code>ConnectionState</code> that should hopefully make sure our connections in the pool are valid</li>
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</ul></li>
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</ul>
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<!-- vim: set sw=2 ts=2: -->
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@ -45,7 +45,7 @@ Disallow: /cgspace-notes/2015-12/
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Disallow: /cgspace-notes/2015-11/
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Disallow: /cgspace-notes/
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Disallow: /cgspace-notes/categories/
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Disallow: /cgspace-notes/tags/notes/
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Disallow: /cgspace-notes/categories/notes/
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Disallow: /cgspace-notes/tags/notes/
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Disallow: /cgspace-notes/posts/
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Disallow: /cgspace-notes/tags/
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@ -4,7 +4,7 @@
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<url>
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<loc>https://alanorth.github.io/cgspace-notes/2019-03/</loc>
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<lastmod>2019-03-23T12:50:02+02:00</lastmod>
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<lastmod>2019-03-24T09:20:19+02:00</lastmod>
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</url>
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<url>
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@ -214,7 +214,7 @@
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<url>
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<loc>https://alanorth.github.io/cgspace-notes/</loc>
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<lastmod>2019-03-23T12:50:02+02:00</lastmod>
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<lastmod>2019-03-24T09:20:19+02:00</lastmod>
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<priority>0</priority>
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</url>
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@ -223,27 +223,27 @@
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<priority>0</priority>
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</url>
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<url>
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<loc>https://alanorth.github.io/cgspace-notes/tags/notes/</loc>
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<lastmod>2019-03-23T12:50:02+02:00</lastmod>
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<priority>0</priority>
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</url>
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<url>
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<loc>https://alanorth.github.io/cgspace-notes/categories/notes/</loc>
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<lastmod>2018-03-09T22:10:33+02:00</lastmod>
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<priority>0</priority>
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</url>
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<url>
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<loc>https://alanorth.github.io/cgspace-notes/tags/notes/</loc>
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<lastmod>2019-03-24T09:20:19+02:00</lastmod>
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<priority>0</priority>
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</url>
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<url>
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<loc>https://alanorth.github.io/cgspace-notes/posts/</loc>
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<lastmod>2019-03-23T12:50:02+02:00</lastmod>
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<lastmod>2019-03-24T09:20:19+02:00</lastmod>
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<priority>0</priority>
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</url>
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<url>
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<loc>https://alanorth.github.io/cgspace-notes/tags/</loc>
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<lastmod>2019-03-23T12:50:02+02:00</lastmod>
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<lastmod>2019-03-24T09:20:19+02:00</lastmod>
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<priority>0</priority>
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</url>
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