Update notes for 2017-12-18

content/post/2017-12.md

@@ -325,3 +325,48 @@ Elapsed time: 2 secs (2559 msecs)
 
 - I need to keep an eye on this issue because it has nice fixes for reducing the number of database connections in DSpace 5.7: https://jira.duraspace.org/browse/DS-3551
 - Update text on CGSpace about page to give some tips to developers about using the resources more wisely ([#352](https://github.com/ilri/DSpace/pull/352))
+- Linode alerted that CGSpace was using 396.3% CPU from 12 to 2 PM
+- The REST and OAI API logs look pretty much the same as earlier this morning, but there's a new IP harvesting XMLUI:
+
+```
+# 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 "18/Dec/2017" | awk '{print $1}' | sort -n | uniq -c | sort -h | tail            
+    360 95.108.181.88
+    477 66.249.66.90
+    526 86.101.203.216
+    691 207.46.13.13
+    698 197.210.168.174
+    819 207.46.13.146
+    878 68.180.229.254
+   1965 104.196.152.243
+  17701 2.86.72.181
+  52532 137.108.70.7
+```
+
+- 2.86.72.181 appears to be from Greece, and has the following user agent:
+
+```
+Mozilla/3.0 (compatible; Indy Library)
+```
+
+- Surprisingly it seems they are re-using their Tomcat session for all those 17,000 requests:
+
+```
+$ grep 2.86.72.181 dspace.log.2017-12-18 | grep -o -E 'session_id=[A-Z0-9]{32}' | sort -n | uniq | wc -l                                                                                          
+1
+```
+
+- I guess there's nothing I can do to them for now
+- In other news, I am curious how many PostgreSQL connection pool errors we've had in the last month:
+
+```
+$ grep -c "Cannot get a connection, pool error Timeout waiting for idle object" dspace.log.2017-1* | grep -v :0
+dspace.log.2017-11-07:15695
+dspace.log.2017-11-08:135
+dspace.log.2017-11-17:1298
+dspace.log.2017-11-26:4160
+dspace.log.2017-11-28:107
+dspace.log.2017-11-29:3972
+dspace.log.2017-12-01:1601
+dspace.log.2017-12-02:1274
+dspace.log.2017-12-07:2769
+```