Public bug reported:
The jmap -heap <pid> command is broken since the update to
7u95-2.6.4-0ubuntu0.14.04.1
Given a tomcat process running with openjdk-7 under a non-root user.
Before that update sudo jmap -heap <pid> gave output about heap configured on
top + also the heap usage inside each reason of the java heap (eden, old gen,
permgen) etc...
Note: running as root is and was required even before to get the '-heap' option
to work. Where as running 'jmap -dump:file' only works when running as user the
jvm runs under and not root. That just as context as it is strange behavior of
jmap since a long time.
After the update to the specified version only the intro is shown and
instead of the usage the following error:
Attaching to process ID 1571, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 24.95-b01
using thread-local object allocation.
Parallel GC with 2 thread(s)
Heap Configuration:
MinHeapFreeRatio = 0
MaxHeapFreeRatio = 100
MaxHeapSize = 1363148800 (1300.0MB)
NewSize = 1310720 (1.25MB)
MaxNewSize = 17592186044415 MB
OldSize = 5439488 (5.1875MB)
NewRatio = 2
SurvivorRatio = 8
PermSize = 21757952 (20.75MB)
MaxPermSize = 268435456 (256.0MB)
G1HeapRegionSize = 0 (0.0MB)
Heap Usage:
Exception in thread "main" java.lang.reflect.InvocationTargetException
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:606)
at sun.tools.jmap.JMap.runTool(JMap.java:197)
at sun.tools.jmap.JMap.main(JMap.java:128)
Caused by: java.lang.RuntimeException: unknown CollectedHeap type : class
sun.jvm.hotspot.gc_interface.CollectedHeap
at sun.jvm.hotspot.tools.HeapSummary.run(HeapSummary.java:146)
at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
at sun.jvm.hotspot.tools.HeapSummary.main(HeapSummary.java:40)
... 6 more
The last version before we noticed that bug was:
7u91-2.6.3-0ubuntu0.14.04.1
Not 100% sure that this exact version still worked but quite sure.
We could reproduce the issue in 2 different servers both running 14.04
LTS 64bit
** Affects: openjdk-7 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1548434
Title:
jmap -heap broken since update to 7u95-2.6.4-0ubuntu0.14.04.1
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