Add notes for 2022-07-17

content/posts/2022-07.md

@@ -285,4 +285,38 @@ $ grep 65.108.95.23 dspace.log.2022-07-10 | grep -oE 'session_id=[A-Z0-9]{32}:ip
   - The reason is apparently that the default `db.dialect` changed from "org.dspace.storage.rdbms.hibernate.postgres.DSpacePostgreSQL82Dialect" to "org.hibernate.dialect.PostgreSQL94Dialect" as a result of a Hibernate update
 - Then I was getting more errors starting the backend server in Tomcat, but the issue was that the backend server needs Solr to be up first!
 
+## 2022-07-17
+
+- Start a harvest on AReS around 3:30PM
+- Later in the evening I see CGSpace was going down and up (not as bad as last Sunday) with around 18.0 load...
+- I see very high CPU usage:
+
+![CPU day](/cgspace-notes/2022/07/cpu-day2.png)
+
+- But DSpace sessions are normal (not like last weekend):
+
+![DSpace sessions week](/cgspace-notes/2022/07/jmx_dspace_sessions-week2.png)
+
+- I see some Hetzner IPs in the top users today, but most of the requests are getting HTTP 503 because of the changes I made last week
+- I see 137.184.159.211, which is on Digital Ocean, and the DNS is apparently iitawpsite.iita.org
+  - I've seen their user agent before, but I don't think I knew it was IITA: "GuzzleHttp/6.3.3 curl/7.84.0 PHP/7.4.30"
+  - I already have something in nginx to mark Guzzle as a bot, but interestingly it shows up in Solr as `$http_user_agent` so there is a logic error in my nginx config
+- Ouch, the logic error seems to be this:
+
+```console
+geo $ua {
+    default          $http_user_agent;
+
+    include /etc/nginx/bot-networks.conf;
+}
+```
+
+- After some testing on DSpace Test I see that this is actually setting the default user agent to a literal `$http_user_agent`
+- The [nginx map docs](http://nginx.org/en/docs/http/ngx_http_map_module.html) say:
+
+> The resulting value can contain text, variable (0.9.0), and their combination (1.11.0).
+
+- But I can't get it to work, neither for the default value or for matching my IP...
+  - I will have to ask on the nginx mailing list
+
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