jthread dump of hanging j7 u2 nebula44 server

gistfile1.txt

spacegame@nexar:~/nebula-server/current$ jstack 1241
1241: Unable to open socket file: target process not responding or HotSpot VM not loaded
The -F option can be used when the target process is not responding
spacegame@nexar:~/nebula-server/current$ jstack -F 1241
Attaching to process ID 1241, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 22.0-b10
Deadlock Detection:

No deadlocks found.

Thread 1246: (state = BLOCKED)
 - sun.misc.Signal.dispatch(int) @bci=29, line=206 (Interpreted frame)


Thread 1245: (state = BLOCKED)
 - java.lang.Object.wait(long) @bci=0 (Interpreted frame)
 - java.lang.ref.ReferenceQueue.remove(long) @bci=44, line=135 (Compiled frame)
 - java.lang.ref.ReferenceQueue.remove() @bci=2, line=151 (Compiled frame)
 - java.lang.ref.Finalizer$FinalizerThread.run() @bci=3, line=177 (Interpreted frame)


Thread 1244: (state = BLOCKED)
 - java.lang.Object.wait(long) @bci=0 (Interpreted frame)
 - java.lang.Object.wait() @bci=2, line=503 (Compiled frame)
 - java.lang.ref.Reference$ReferenceHandler.run() @bci=46, line=133 (Compiled frame)


Thread 1242: (state = BLOCKED)
Error occurred during stack walking:
sun.jvm.hotspot.utilities.AssertionFailure: range check
	at sun.jvm.hotspot.utilities.Assert.that(Assert.java:32)
	at sun.jvm.hotspot.runtime.RegisterMap.<init>(RegisterMap.java:109)
	at sun.jvm.hotspot.runtime.x86.X86RegisterMap.<init>(X86RegisterMap.java:39)
	at sun.jvm.hotspot.runtime.x86.X86RegisterMap.clone(X86RegisterMap.java:43)
	at sun.jvm.hotspot.runtime.VFrame.<init>(VFrame.java:37)
	at sun.jvm.hotspot.runtime.JavaVFrame.<init>(JavaVFrame.java:45)
	at sun.jvm.hotspot.runtime.CompiledVFrame.<init>(CompiledVFrame.java:43)
	at sun.jvm.hotspot.runtime.VFrame.newVFrame(VFrame.java:77)
	at sun.jvm.hotspot.runtime.VFrame.newVFrame(VFrame.java:84)
	at sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:228)
	at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:76)
	at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
	at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
	at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
	at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at sun.tools.jstack.JStack.runJStackTool(JStack.java:136)
	at sun.tools.jstack.JStack.main(JStack.java:102)