jmap报错

[root@host-10-0-197-189 service]# jmap -heap 12139
Attaching to process ID 12139, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 25.191-b12

using thread-local object allocation.
Parallel GC with 8 thread(s)

Heap Configuration:
   MinHeapFreeRatio         = 0
   MaxHeapFreeRatio         = 100
   MaxHeapSize              = 4164943872 (3972.0MB)
   NewSize                  = 87031808 (83.0MB)
   MaxNewSize               = 1388314624 (1324.0MB)
   OldSize                  = 175112192 (167.0MB)
   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

 

先看下openjdk环境版本

[root@host-10-0-197-189 service]# 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)

[root@host-10-0-197-189 service]# whereis jmap

jmap: /usr/bin/jmap /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-0.el7_5.x86_64/bin/jmap /usr/share/man/man1/jmap.1.gz

 

debuginfo安装

到http://debuginfo.centos.org/7/x86_64/下载对应版本的debuginfo，注意小版本号也要一致

wget http://debuginfo.centos.org/7/x86_64/java-1.8.0-openjdk-debuginfo-1.8.0.191.b12-0.el7_5.x86_64.rpm

大概86MB，下载速度较慢，要稍等一会

rpm -ivh java-1.8.0-openjdk-debuginfo-1.8.0.191.b12-0.el7_5.x86_64.rpm

 

安装后再测试

[root@host-10-0-197-189 ~]# jmap -heap 12139
Attaching to process ID 12139, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 25.191-b12

using thread-local object allocation.
Parallel GC with 8 thread(s)

Heap Configuration:
   MinHeapFreeRatio         = 0
   MaxHeapFreeRatio         = 100
   MaxHeapSize              = 4164943872 (3972.0MB)
   NewSize                  = 87031808 (83.0MB)
   MaxNewSize               = 1388314624 (1324.0MB)
   OldSize                  = 175112192 (167.0MB)
   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 = 1225785344 (1169.0MB)
   used     = 81512560 (77.73643493652344MB)
   free     = 1144272784 (1091.2635650634766MB)
   6.649823347863425% used
From Space:
   capacity = 1048576 (1.0MB)
   used     = 1035408 (0.9874420166015625MB)
   free     = 13168 (0.0125579833984375MB)
   98.74420166015625% used
To Space:
   capacity = 31981568 (30.5MB)
   used     = 0 (0.0MB)
   free     = 31981568 (30.5MB)
   0.0% used
PS Old Generation
   capacity = 142082048 (135.5MB)
   used     = 106576600 (101.63936614990234MB)
   free     = 35505448 (33.860633850097656MB)
   75.01060232465117% used

33869 interned Strings occupying 3401544 bytes.

已经可以使用了