#heapdump

# /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:

OPTIONS=(strip docs libtool staticlibs emptydirs zipman purge !upx)

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