When you're running ArchLinux and want to create a heapDump from your java application might encounter the following exception:
Caused by: sun.jvm.hotspot.utilities.AssertionFailure: Expecting GenCollectedHeap, G1CollectedHeap, or ParallelScavengeHeap, but got
The full stacktrace is here:
# /opt/java7/bin/jmap -F -dump:format=b,file=/root/heap.dump 15739
Attaching to process ID 15739, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 23.25-b01
Dumping heap to /root/heap.dump ...
Exception in thread "main" java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.tools.jmap.JMap.runTool(JMap.java:197)
at sun.tools.jmap.JMap.main(JMap.java:128)
Caused by: sun.jvm.hotspot.utilities.AssertionFailure: Expecting GenCollectedHeap, G1CollectedHeap, or ParallelScavengeHeap, but got sun.jvm.hotspot.gc_interface.CollectedHeap
at sun.jvm.hotspot.utilities.Assert.that(Assert.java:32)
at sun.jvm.hotspot.oops.ObjectHeap.collectLiveRegions(ObjectHeap.java:605)
at sun.jvm.hotspot.oops.ObjectHeap.iterate(ObjectHeap.java:244)
at sun.jvm.hotspot.utilities.AbstractHeapGraphWriter.write(AbstractHeapGraphWriter.java:51)
at sun.jvm.hotspot.utilities.HeapHprofBinWriter.write(HeapHprofBinWriter.java:416)
at sun.jvm.hotspot.tools.HeapDumper.run(HeapDumper.java:56)
at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
at sun.jvm.hotspot.tools.HeapDumper.main(HeapDumper.java:77)
... 6 more
The solution is to re-compile your java package with the debug symbols. Unfortunately the makepkg removes them when building the package. But you can override this by adding the following option to your PKGBUILD file:
options=(!strip)
This will leave the debug symbols in your code and you'll be able to create a java heapDump after installing the newly compiled package.
The related part from the makepkg.conf(5) man page:
This array contains options that affect the default packaging. They are equivalent to options that can be placed in the PKGBUILD; the defaults are shown here. All options should always be left in the array; to enable or disable an option simply remove or place an “!” at the front of the option. If an option is specified multiple times, the final value takes precedence. Each option works as follows:
strip
Strip symbols from binaries and libraries. If you frequently use a debugger on programs or libraries, it may be helpful to disable this option.
