Fuse ESB mysteriously hangs - "JVM appears hung: Timed out waiting for signal from JVM."

Question

My Fuse ESB application suddenly stopped, with no clues in fuseesb.log and the following weird log items in wrapper.log:

ERROR  | wrapper  | 2014/02/12 02:36:59 | JVM appears hung: Timed out waiting for signal from JVM.
ERROR  | wrapper  | 2014/02/12 02:36:59 | JVM did not exit on request, terminated
STATUS | wrapper  | 2014/02/12 02:37:02 | JVM exited in response to signal SIGKILL (9).
ERROR  | wrapper  | 2014/02/12 02:37:02 | Unable to start a JVM
STATUS | wrapper  | 2014/02/12 02:37:02 | <-- Wrapper Stopped

We are using Nagios to monitor the system.

System info: FuseESBEnterprise-7.1.0 / linux-gnu (x86_64).

For various reasons we need to sick with Fuse ESB (not possible to migrate to JBoss Fuse...)

Answer 1

This was a system issue - the vm hung.

You can catch this kind of condition in one of two ways:

1. monitor the java jvm process

2. monitor the wrapper.log file for errors