How to use JCMD to access NMT data

Asked Oct 01 '19 at 04:54

Active Oct 01 '19 at 04:54

Viewed 146 times

I am trying to access NMT using jcmd trough this below code:

jcmd 4348 VM.native_memory [summary] [scale=10 GB]

But getting this below error:

com.sun.tools.attach.AttachNotSupportedException: Unable to attach to 32-bit pro
cess running under WOW64
        at sun.tools.attach.WindowsVirtualMachine.openProcess(Native Method)
        at sun.tools.attach.WindowsVirtualMachine.<init>(WindowsVirtualMachine.j
ava:56)
        at sun.tools.attach.WindowsAttachProvider.attachVirtualMachine(WindowsAt
tachProvider.java:69)
        at com.sun.tools.attach.VirtualMachine.attach(VirtualMachine.java:208)
        at sun.tools.jcmd.JCmd.executeCommandForPid(JCmd.java:147)
        at sun.tools.jcmd.JCmd.main(JCmd.java:131

)

asked Oct 01 '19 at 04:54

Subhranil Sengupta

Use `jcmd` from the same JDK as the target process runs. – apangin Oct 01 '19 at 07:40
I have been using the same jdk. – Subhranil Sengupta Oct 01 '19 at 08:36
Obviously not, because the above message is printed only when trying to attach a 64-bit jcmd to a 32-bit target JVM. – apangin Oct 01 '19 at 10:14
Alternatively, you can use [jattach32](https://github.com/apangin/jattach/releases/download/v1.5/jattach32.exe) binary from [jattach](https://github.com/apangin/jattach) project. – apangin Oct 01 '19 at 11:56

How to use JCMD to access NMT data

0 Answers0