使用jmap工具查看java堆详细信息 报错 java.lang.RuntimeException: unknown CollectedHeap type : class sun.jvm.hot...

使用jmap -heap命令查看堆的详细信息报错

• java.lang.RuntimeException: unknown CollectedHeap type : class sun.jvm.hotspot.gc_interface.CollectedHeap

[root@]#jmap -heap 10094
Attaching to process ID 10094, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 25.191-b12
using thread-local object allocation.
Parallel GC with 2 thread(s)
Heap Configuration:
   MinHeapFreeRatio         = 0
   MaxHeapFreeRatio         = 100
   MaxHeapSize              = 1073741824 (1024.0MB)
   NewSize                  = 357564416 (341.0MB)
   MaxNewSize               = 357564416 (341.0MB)
   OldSize                  = 716177408 (683.0MB)
   NewRatio                 = 2
   SurvivorRatio            = 8
   MetaspaceSize            = 21807104 (20.796875MB)
   CompressedClassSpaceSize = 1073741824 (1024.0MB)
   MaxMetaspaceSize         = 17592186044415 MB
   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:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at sun.tools.jmap.JMap.runTool(JMap.java:201)
        at sun.tools.jmap.JMap.main(JMap.java:130)
Caused by: java.lang.RuntimeException: unknown CollectedHeap type : class sun.jvm.hotspot.gc_interface.CollectedHeap
        at sun.jvm.hotspot.tools.HeapSummary.run(HeapSummary.java:157)
        at sun.jvm.hotspot.tools.Tool.startInternal(Tool.java:260)
        at sun.jvm.hotspot.tools.Tool.start(Tool.java:223)
        at sun.jvm.hotspot.tools.Tool.execute(Tool.java:118)
        at sun.jvm.hotspot.tools.HeapSummary.main(HeapSummary.java:50)
        ... 6 more
[root@]#java -version
openjdk version "1.8.0_191"
OpenJDK Runtime Environment (build 1.8.0_191-b12)
OpenJDK 64-Bit Server VM (build 25.191-b12, mixed mode)

解决方法

• 安装debuginfo 地址http://debuginfo.centos.org/7/x86_64
• 找到跟OpenJDK匹配的版本 例如我的是(build 1.8.0_191-b12)
• 下载wget http://debuginfo.centos.org/7/x86_64/java-1.8.0-openjdk-debuginfo-1.8.0.191.b12-1.el7_6.x86_64.rpm
• 安装rpm -ivh java-1.8.0-openjdk-debuginfo-1.8.0.191.b12-1.el7_6.x86_64.rpm

使用

[root@]#jmap -heap 10094
Attaching to process ID 10094, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 25.191-b12
using thread-local object allocation.
Parallel GC with 2 thread(s)
Heap Configuration:
   MinHeapFreeRatio         = 0
   MaxHeapFreeRatio         = 100
   MaxHeapSize              = 1073741824 (1024.0MB)
   NewSize                  = 357564416 (341.0MB)
   MaxNewSize               = 357564416 (341.0MB)
   OldSize                  = 716177408 (683.0MB)
   NewRatio                 = 2
   SurvivorRatio            = 8
   MetaspaceSize            = 21807104 (20.796875MB)
   CompressedClassSpaceSize = 1073741824 (1024.0MB)
   MaxMetaspaceSize         = 17592186044415 MB
   G1HeapRegionSize         = 0 (0.0MB)
Heap Usage:
PS Young Generation
Eden Space:
   capacity = 300941312 (287.0MB)
   used     = 63851048 (60.893104553222656MB)
   free     = 237090264 (226.10689544677734MB)
   21.217109600426014% used
From Space:
   capacity = 27787264 (26.5MB)
   used     = 27264416 (26.001373291015625MB)
   free     = 522848 (0.498626708984375MB)
   98.11838977741745% used
To Space:
   capacity = 28835840 (27.5MB)
   used     = 0 (0.0MB)
   free     = 28835840 (27.5MB)
   0.0% used
PS Old Generation
   capacity = 716177408 (683.0MB)
   used     = 116518800 (111.12098693847656MB)
   free     = 599658608 (571.8790130615234MB)
   16.269544207683246% used
38781 interned Strings occupying 4236056 bytes.
[root@]#