Crash

The Wrapper includes a lightweight native library which is used to handle system events. The library also contains a native method, which is used for testing, to cause an access violation in native code due to a NULL reference.

Depending on the JVM, this will give different output. In the example below, the JVM created a core dump which takes about a minute to save. During this time, the JVM appears to be hung so the Wrapper kills and restarts it.

Console Output:

wrapper  | --> Wrapper Started as Console
wrapper  | Launching a JVM...
jvm 1    | Initializing...
jvm 1    | Wrapper (Version 3.x.x)
jvm 1    |
jvm 1    | start()
jvm 1    | WARNING: Attempting to cause an access violation...
jvm 1    | #
jvm 1    | # An EXCEPTION_ACCESS_VIOLATION exception has been detected in native code outside the VM.
jvm 1    | # Program counter=0x8f7105f
jvm 1    | #
wrapper  | JVM is hung: Timed out waiting for signal from JVM.
wrapper  | Java Virtual Machine did not exit on request, terminated
wrapper  | Launching a JVM...
jvm 2    | Initializing...
jvm 2    | Wrapper (Version 3.x.x)
jvm 2    |
jvm 2    | start()