--- title: "January, 2018" date: 2018-01-02T08:35:54-08:00 author: "Alan Orth" tags: ["Notes"] --- ## 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 ## 2018-01-03 - I woke up to more up and down of CGSpace, this time UptimeRobot noticed a few rounds of up and down of a few minutes each and Linode also notified of high CPU load from 12 to 2 PM - Looks like I need to increase the database pool size again: ``` $ grep -c "Timeout: Pool empty." dspace.log.2018-01-* dspace.log.2018-01-01:0 dspace.log.2018-01-02:1972 dspace.log.2018-01-03:1909 ``` - For some reason there were a lot of "active" connections last night: ![CGSpace PostgreSQL connections](/cgspace-notes/2018/01/postgres_connections-day.png) - The active IPs in XMLUI are: ``` # cat /var/log/nginx/access.log /var/log/nginx/access.log.1 /var/log/nginx/library-access.log /var/log/nginx/library-access.log.1 | grep -E "3/Jan/2018" | awk '{print $1}' | sort -n | uniq -c | sort -h | tail 607 40.77.167.141 611 2a00:23c3:8c94:7800:392c:a491:e796:9c50 663 188.226.169.37 759 157.55.39.245 887 68.180.229.254 1037 157.55.39.175 1068 216.244.66.245 1495 66.249.64.91 1934 104.196.152.243 2219 134.155.96.78 ``` - 134.155.96.78 appears to be at the University of Mannheim in Germany - They identify as: Mozilla/5.0 (compatible; heritrix/3.2.0 +http://ifm.uni-mannheim.de) - This appears to be the [Internet Archive's open source bot](https://github.com/internetarchive/heritrix3) - They seem to be re-using their Tomcat session so I don't need to do anything to them just yet: ``` $ grep 134.155.96.78 dspace.log.2018-01-03 | grep -o -E 'session_id=[A-Z0-9]{32}' | sort -n | uniq | wc -l 2 ``` - The API logs show the normal users: ``` # cat /var/log/nginx/rest.log /var/log/nginx/rest.log.1 /var/log/nginx/oai.log /var/log/nginx/oai.log.1 | grep -E "3/Jan/2018" | awk '{print $1}' | sort -n | uniq -c | sort -h | tail 32 207.46.13.182 38 40.77.167.132 38 68.180.229.254 43 66.249.64.91 46 40.77.167.141 49 157.55.39.245 79 157.55.39.175 1533 50.116.102.77 4069 70.32.83.92 9355 45.5.184.196 ``` - In other related news I see a sizeable amount of requests coming from python-requests - For example, just in the last day there were 1700! ``` # cat /var/log/nginx/access.log /var/log/nginx/access.log.1 /var/log/nginx/library-access.log /var/log/nginx/library-access.log.1 | grep -c python-requests 1773 ``` - But they come from hundreds of IPs, many of which are 54.x.x.x: ``` # cat /var/log/nginx/access.log /var/log/nginx/access.log.1 /var/log/nginx/library-access.log /var/log/nginx/library-access.log.1 | grep python-requests | awk '{print $1}' | sort -n | uniq -c | sort -h | tail -n 30 9 54.144.87.92 9 54.146.222.143 9 54.146.249.249 9 54.158.139.206 9 54.161.235.224 9 54.163.41.19 9 54.163.4.51 9 54.196.195.107 9 54.198.89.134 9 54.80.158.113 10 54.198.171.98 10 54.224.53.185 10 54.226.55.207 10 54.227.8.195 10 54.242.234.189 10 54.242.238.209 10 54.80.100.66 11 54.161.243.121 11 54.205.154.178 11 54.234.225.84 11 54.87.23.173 11 54.90.206.30 12 54.196.127.62 12 54.224.242.208 12 54.226.199.163 13 54.162.149.249 13 54.211.182.255 19 50.17.61.150 21 54.211.119.107 139 164.39.7.62 ``` - I have no idea what these are but they seem to be coming from Amazon... - I guess for now I just have to increase the database connection pool's max active - It's currently 75 and normally I'd just bump it by 25 but let me be a bit daring and push it by 50 to 125, because I used to see at least 121 connections in pg_stat_activity before when we were using the shitty default pooling ## 2018-01-04 - CGSpace went down and up a bunch of times last night and ILRI staff were complaining a lot last night - The XMLUI logs show this activity: ``` # cat /var/log/nginx/access.log /var/log/nginx/access.log.1 /var/log/nginx/library-access.log /var/log/nginx/library-access.log.1 | grep -E "4/Jan/2018" | awk '{print $1}' | sort -n | uniq -c | sort -h | tail 968 197.211.63.81 981 213.55.99.121 1039 66.249.64.93 1258 157.55.39.175 1273 207.46.13.182 1311 157.55.39.191 1319 157.55.39.197 1775 66.249.64.78 2216 104.196.152.243 3366 66.249.64.91 ``` - Again we ran out of PostgreSQL database connections, even after bumping the pool max active limit from 50 to 75 to 125 yesterday! ``` 2018-01-04 07:36:08,089 ERROR org.dspace.storage.rdbms.DatabaseManager @ SQL connection Error - org.apache.tomcat.jdbc.pool.PoolExhaustedException: [http-bio-127.0.0.1-8443-exec-256] Timeout: Pool empty. Unable to fetch a connection in 5 seconds, none available[size:125; busy:125; idle:0; lastwait:5000]. ``` - So for this week that is the number one problem! ``` $ grep -c "Timeout: Pool empty." dspace.log.2018-01-* dspace.log.2018-01-01:0 dspace.log.2018-01-02:1972 dspace.log.2018-01-03:1909 dspace.log.2018-01-04:1559 ``` - I will just bump the connection limit to 300 because I'm fucking fed up with this shit - Once I get back to Amman I will have to try to create different database pools for different web applications, like recently discussed on the dspace-tech mailing list