solr-jetty does not work - multiple issues

[Colin McKinnon]

After installing solr-jetty and solr-common (3.6.2+dfsg-1) on Ubuntu 18.04.4 LTS, jetty starts and reports a banner page at http://$HOST:8080/ but returns an error at http://$HOST:8080/solr/

(I'm guessing based on the config that this is the path - the documentation explains *nothing*).

Although a directories /var/log/solr and /var/log/jetty9 are created, there is nothing in them.

systemd is capturing some information that suggests something is going wrong at startup:

? jetty9.service - Jetty 9 Web Application Server
   Loaded: loaded (/lib/systemd/system/jetty9.service; enabled; vendor preset: enabled)
   Active: active (running) since Mon 2020-03-30 22:27:39 BST; 13min ago
     Docs: https://www.eclipse.org/jetty/documentation/current/
 Main PID: 1206 (java)
    Tasks: 27 (limit: 2318)
   CGroup: /system.slice/jetty9.service
           +-1206 /usr/bin/java -Djetty.home=/usr/share/jetty9 -Djetty.base=/usr/share/jetty9 -Djava.io.tmpdir=/tmp -jar /usr/share/jetty9/start.jar jetty.state=/var/lib/jetty9/jetty.state jetty-started.xml

Mar 30 22:27:41 dev-a02-si-solr.bip jetty9[1206]: at org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1511)
Mar 30 22:27:41 dev-a02-si-solr.bip jetty9[1206]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
Mar 30 22:27:41 dev-a02-si-solr.bip jetty9[1206]: at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
Mar 30 22:27:41 dev-a02-si-solr.bip jetty9[1206]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
Mar 30 22:27:41 dev-a02-si-solr.bip jetty9[1206]: at java.lang.reflect.Method.invoke(Method.java:498)
Mar 30 22:27:41 dev-a02-si-solr.bip jetty9[1206]: at org.eclipse.jetty.start.Main.invokeMain(Main.java:220)
Mar 30 22:27:41 dev-a02-si-solr.bip jetty9[1206]: at org.eclipse.jetty.start.Main.start(Main.java:490)
Mar 30 22:27:41 dev-a02-si-solr.bip jetty9[1206]: at org.eclipse.jetty.start.Main.main(Main.java:77)
Mar 30 22:27:41 dev-a02-si-solr.bip jetty9[1206]: 2020-03-30 22:27:41.475:INFO:oejs.AbstractConnector:main: Started ServerConnector@51399530{HTTP/1.1,[http/1.1]}{0.0.0.0:8080}
Mar 30 22:27:41 dev-a02-si-solr.bip jetty9[1206]: 2020-03-30 22:27:41.475:INFO:oejs.Server:main: Started @1654ms

There are no setup instructions in /usr/share/doc/solr-jetty

i.e. issues are:
1) it doesn't appear to work
2) documentation is incomplete
3) default configuration is not writing any log files

[Colin McKinnon (symcbean)]

After trying solr-tomcat in place of solr-jetty, I get some more meaningful errors suggesting that the system won't start due to the lack of any base dataset. Navigating to the solr web page returns a stack trace suggesting:

If you want solr to continue after configuration errors, change: <abortOnConfigurationError>false</abortOnConfigurationError> in solr.xml

However this tag is not currently present in solr.xml, and adding it / retarting the service had no impact on the behaviour.

[Colin McKinnon (symcbean)]

(and it suggests that the primary issues are within solr-common)