CGSpace Notes

2018-09-02

• New PostgreSQL JDBC driver version 42.2.5
• I’ll update the DSpace role in our Ansible infrastructure playbooks and run the updated playbooks on CGSpace and DSpace Test
• Also, I’ll re-run the postgresql tasks because the custom PostgreSQL variables are dynamic according to the system’s RAM, and we never re-ran them after migrating to larger Linodes last month
• I’m testing the new DSpace 5.8 branch in my Ubuntu 18.04 environment and I’m getting those autowire errors in Tomcat 8.5.30 again:

2018-08-01

• DSpace Test had crashed at some point yesterday morning and I see the following in dmesg:

[Tue Jul 31 00:00:41 2018] Out of memory: Kill process 1394 (java) score 668 or sacrifice child
[Tue Jul 31 00:00:41 2018] Killed process 1394 (java) total-vm:15601860kB, anon-rss:5355528kB, file-rss:0kB, shmem-rss:0kB
[Tue Jul 31 00:00:41 2018] oom_reaper: reaped process 1394 (java), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB

• Judging from the time of the crash it was probably related to the Discovery indexing that starts at midnight
• From the DSpace log I see that eventually Solr stopped responding, so I guess the java process that was OOM killed above was Tomcat’s
• I’m not sure why Tomcat didn’t crash with an OutOfMemoryError…
• Anyways, perhaps I should increase the JVM heap from 5120m to 6144m like we did a few months ago when we tried to run the whole CGSpace Solr core
• The server only has 8GB of RAM so we’ll eventually need to upgrade to a larger one because we’ll start starving the OS, PostgreSQL, and command line batch processes
• I ran all system updates on DSpace Test and rebooted it

2018-07-01

• I want to upgrade DSpace Test to DSpace 5.8 so I took a backup of its current database just in case:

$ pg_dump -b -v -o --format=custom -U dspace -f dspace-2018-07-01.backup dspace

• During the mvn package stage on the 5.8 branch I kept getting issues with java running out of memory:

There is insufficient memory for the Java Runtime Environment to continue.

2018-06-04

• Test the DSpace 5.8 module upgrades from Atmire (#378)
  • There seems to be a problem with the CUA and L&R versions in pom.xml because they are using SNAPSHOT and it doesn’t build
• I added the new CCAFS Phase II Project Tag PII-FP1_PACCA2 and merged it into the 5_x-prod branch (#379)
• I proofed and tested the ILRI author corrections that Peter sent back to me this week:

$ ./fix-metadata-values.py -i /tmp/2018-05-30-Correct-660-authors.csv -db dspace -u dspace -p 'fuuu' -f dc.contributor.author -t correct -m 3 -n

• I think a sane proofing workflow in OpenRefine is to apply the custom text facets for check/delete/remove and illegal characters that I developed in March, 2018
• Time to index ~70,000 items on CGSpace:

$ time schedtool -D -e ionice -c2 -n7 nice -n19 [dspace]/bin/dspace index-discovery -b                                  

real    74m42.646s
user    8m5.056s
sys     2m7.289s

2018-05-01

• I cleared the Solr statistics core on DSpace Test by issuing two commands directly to the Solr admin interface:
  • http://localhost:3000/solr/statistics/update?stream.body=%3Cdelete%3E%3Cquery%3E*:*%3C/query%3E%3C/delete%3E
  • http://localhost:3000/solr/statistics/update?stream.body=%3Ccommit/%3E
• Then I reduced the JVM heap size from 6144 back to 5120m
• Also, I switched it to use OpenJDK instead of Oracle Java, as well as re-worked the Ansible infrastructure scripts to support hosts choosing which distribution they want to use

2018-04-01

• I tried to test something on DSpace Test but noticed that it’s down since god knows when
• Catalina logs at least show some memory errors yesterday:

2018-03-02

• Export a CSV of the IITA community metadata for Martin Mueller

2018-02-01

• Peter gave feedback on the dc.rights proof of concept that I had sent him last week
• We don’t need to distinguish between internal and external works, so that makes it just a simple list
• Yesterday I figured out how to monitor DSpace sessions using JMX
• I copied the logic in the jmx_tomcat_dbpools provided by Ubuntu’s munin-plugins-java package and used the stuff I discovered about JMX in 2018-01

2018-01-02

• Uptime Robot noticed that CGSpace went down and up a few times last night, for a few minutes each time
• I didn’t get any load alerts from Linode and the REST and XMLUI logs don’t show anything out of the ordinary
• The nginx logs show HTTP 200s until 02/Jan/2018:11:27:17 +0000 when Uptime Robot got an HTTP 500
• In dspace.log around that time I see many errors like “Client closed the connection before file download was complete”
• And just before that I see this:

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].

• Ah hah! So the pool was actually empty!
• I need to increase that, let’s try to bump it up from 50 to 75
• 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
• I notice this error quite a few times in dspace.log:

2018-01-02 01:21:19,137 ERROR org.dspace.app.xmlui.aspect.discovery.SidebarFacetsTransformer @ Error while searching for sidebar facets
org.dspace.discovery.SearchServiceException: org.apache.solr.search.SyntaxError: Cannot parse 'dateIssued_keyword:[1976+TO+1979]': Encountered " "]" "] "" at line 1, column 32.

• And there are many of these errors every day for the past month:

$ grep -c "Error while searching for sidebar facets" dspace.log.*
dspace.log.2017-11-21:4
dspace.log.2017-11-22:1
dspace.log.2017-11-23:4
dspace.log.2017-11-24:11
dspace.log.2017-11-25:0
dspace.log.2017-11-26:1
dspace.log.2017-11-27:7
dspace.log.2017-11-28:21
dspace.log.2017-11-29:31
dspace.log.2017-11-30:15
dspace.log.2017-12-01:15
dspace.log.2017-12-02:20
dspace.log.2017-12-03:38
dspace.log.2017-12-04:65
dspace.log.2017-12-05:43
dspace.log.2017-12-06:72
dspace.log.2017-12-07:27
dspace.log.2017-12-08:15
dspace.log.2017-12-09:29
dspace.log.2017-12-10:35
dspace.log.2017-12-11:20
dspace.log.2017-12-12:44
dspace.log.2017-12-13:36
dspace.log.2017-12-14:59
dspace.log.2017-12-15:104
dspace.log.2017-12-16:53
dspace.log.2017-12-17:66
dspace.log.2017-12-18:83
dspace.log.2017-12-19:101
dspace.log.2017-12-20:74
dspace.log.2017-12-21:55
dspace.log.2017-12-22:66
dspace.log.2017-12-23:50
dspace.log.2017-12-24:85
dspace.log.2017-12-25:62
dspace.log.2017-12-26:49
dspace.log.2017-12-27:30
dspace.log.2017-12-28:54
dspace.log.2017-12-29:68
dspace.log.2017-12-30:89
dspace.log.2017-12-31:53
dspace.log.2018-01-01:45
dspace.log.2018-01-02:34

• 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

2017-12-01

• Uptime Robot noticed that CGSpace went down
• The logs say “Timeout waiting for idle object”
• PostgreSQL activity says there are 115 connections currently
• The list of connections to XMLUI and REST API for today: