my jdk version is 1.8.0_111 and I'm reading a book on JVM. When I tried the command jmap -F 6469, an exception is thrown as below:
Attaching to process ID 6469, please wait...
Error attaching to process: sun.jvm.hotspot.runtime.VMVersionMismatchException: Supported versions are 25.111-b14. Target VM is 25.152-b11
sun.jvm.hotspot.debugger.DebuggerException: sun.jvm.hotspot.runtime.VMVersionMismatchException: Supported versions are 25.111-b14. Target VM is 25.152-b11
at sun.jvm.hotspot.HotSpotAgent.setupVM(HotSpotAgent.java:435)
at sun.jvm.hotspot.HotSpotAgent.go(HotSpotAgent.java:305)
at sun.jvm.hotspot.HotSpotAgent.attach(HotSpotAgent.java:140)
at sun.jvm.hotspot.tools.Tool.start(Tool.java:185)
at sun.jvm.hotspot.tools.Tool.execute(Tool.java:118)
at sun.jvm.hotspot.tools.PMap.main(PMap.java:72)
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: sun.jvm.hotspot.runtime.VMVersionMismatchException: Supported versions are 25.111-b14. Target VM is 25.152-b11
at sun.jvm.hotspot.runtime.VM.checkVMVersion(VM.java:227)
at sun.jvm.hotspot.runtime.VM.<init>(VM.java:294)
at sun.jvm.hotspot.runtime.VM.initialize(VM.java:370)
at sun.jvm.hotspot.HotSpotAgent.setupVM(HotSpotAgent.java:431)
... 11 more
It seems there is something wrong with my jvm version, but I can't find out why. I'm new to JVM, and I'd be grateful if someone could tell me why and how to deal with it.
The target process (6469) runs under different version of JRE (1.8.0_152).
When running jmap or jstack in forced mode (-F), JDK version of the tool must be exactly the same as JDK of the target process.
See this answer for details.