[root@sncdpreapp66 ~]# jmap -heap 21363
Attaching to process ID 21363, please wait...
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: sun.jvm.hotspot.runtime.VMVersionMismatchException: Supported versions are 24.75-b04. Target VM is 25.51-b03
at sun.jvm.hotspot.runtime.VM.checkVMVersion(VM.java:234)
at sun.jvm.hotspot.runtime.VM.<init>(VM.java:297)
at sun.jvm.hotspot.runtime.VM.initialize(VM.java:368)
at sun.jvm.hotspot.bugspot.BugSpotAgent.setupVM(BugSpotAgent.java:598)
at sun.jvm.hotspot.bugspot.BugSpotAgent.go(BugSpotAgent.java:493)
at sun.jvm.hotspot.bugspot.BugSpotAgent.attach(BugSpotAgent.java:331)
at sun.jvm.hotspot.tools.Tool.start(Tool.java:163)
at sun.jvm.hotspot.tools.HeapSummary.main(HeapSummary.java:40)
... 6 more
Attaching to process ID 21363, please wait...
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: sun.jvm.hotspot.runtime.VMVersionMismatchException: Supported versions are 24.75-b04. Target VM is 25.51-b03
at sun.jvm.hotspot.runtime.VM.checkVMVersion(VM.java:234)
at sun.jvm.hotspot.runtime.VM.<init>(VM.java:297)
at sun.jvm.hotspot.runtime.VM.initialize(VM.java:368)
at sun.jvm.hotspot.bugspot.BugSpotAgent.setupVM(BugSpotAgent.java:598)
at sun.jvm.hotspot.bugspot.BugSpotAgent.go(BugSpotAgent.java:493)
at sun.jvm.hotspot.bugspot.BugSpotAgent.attach(BugSpotAgent.java:331)
at sun.jvm.hotspot.tools.Tool.start(Tool.java:163)
at sun.jvm.hotspot.tools.HeapSummary.main(HeapSummary.java:40)
... 6 more
[root@sncdpreapp66 ~]#
原因是linux上安装了多个jvm 版本,在JAVA_HOME PATH 中配置的是1.7的jdk,所以当jvm进程是运行在1.7上时,那么jmap -heap pid生效。
如果jvm是运行在1.8上,那么就不能执行,因为环境变量默认执行的是1.7, 1.8是找不到的。
如果想运行1.8 jvm指令,那么只有将环境变量设置为1.8版本。
本文介绍了解决在Linux环境中使用JMap时遇到的版本不匹配错误的方法。当目标JVM版本与JMap工具版本不符时,文章提供了具体的步骤来确保正确执行内存堆检查。
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