HTTP ERROR 503 on fresh install in Ubuntu 17.10

[innerspaceboy]

Problem Description: I've used Subsonic for many, many years with Ubuntu but after formatting my PC and installing the latest v17.10 I cannot get a clean install of Subsonic to open. After installing localhost:4040 returns HTTP ERROR 503.
Troubleshooting Steps:
- Verified that the latest version of Java 9.0.1 was successfully installed and is running.
- systemctl status subsonic reports that the Subsonic process is active and running
- logging into my modem I see that port 4040 is still forwarded as it has always been
- I rebooted
- stopped and restarted the Subsonic process
- uninstalled Subsonic, rebooted, and installed again
- rolled back to older versions - 6.0, 6.1.1, and 6.1.2 each return the same error
- checked /var/subsonic - the folder is protected but after entering my password I see only a jetty, transcode, and .log file, No db files exist as I haven't gotten far enough to successfully set it up.
Playback Application and version: 4.4
Subsonic Version: Can't get to the About page, but I've tried 6.0, 6.1.1, and 6.1.2
Server Version: Again, can't get that far.
Hardware Platform: Ubuntu 17.10
Java Memory Limit: Can't get that far
Last ten log file lines:

Code: Select all

2231 [main] INFO org.mortbay.log - Started SelectChannelConnector@0.0.0.0:4040
Subsonic running on: http://localhost:4040/
2260 [main] INFO org.springframework.remoting.rmi.RmiServiceExporter - Looking for RMI registry at port '9412'
2310 [main] INFO org.springframework.remoting.rmi.RmiServiceExporter - Could not detect RMI registry - creating new one
2441 [main] INFO org.springframework.remoting.rmi.RmiServiceExporter - Binding service 'SubsonicDeployerService' to RMI registry: RegistryImpl[UnicastServerRef [liveRef: [endpoint:[127.0.1.1:9412](local),objID:[0:0:0, 0]]]]
[14.093s][info][gc] GC(3) Pause Initial Mark (Metadata GC Threshold) 58M->13M(150M) 12.391ms
[14.093s][info][gc] GC(4) Concurrent Cycle
[14.108s][info][gc] GC(4) Pause Remark 13M->13M(150M) 5.936ms
[14.109s][info][gc] GC(4) Pause Cleanup 13M->12M(150M) 0.186ms
[14.110s][info][gc] GC(4) Concurrent Cycle 17.772ms

I really appreciate any help toward a solution.

[innerspaceboy]

ISSUE RESOLVED thanks to kstephens' post -

Cost me some time, but I figured it out.

When enabling a PostgresDB on Linux (Ubuntu) Subsonic 6.1.1 doesn't run on Java 7.
It requires an updated JDBC postgres driver.
And Java 9 doesn't work because of an incompatablity with Spring and Beans.
After installing Sun jdk1.8.0_144, everything worked fine.

I can attach logs if anyone is interested.

The Installation page (http://www.subsonic.org/pages/installation.jsp) page should be updated to
reflect this.

Rolling back to Java v8 resolved the issue. THANKS!