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Editorial Team
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Asked: 2026-06-01T04:45:10+00:00

I have a running JVM with two threads. Is it possible to see these

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I have a running JVM with two threads. Is it possible to see these running threads on my Linux OS with ps -axl ? I am trying to find out what priority the OS is giving to my threads. More info about this other issue here.

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  1. Editorial Team

    Use 

    jps -v

    for finding your java process. Sample Output:

    3825 RemoteMavenServer -Djava.awt.headless=true -Xmx512m -Dfile.encoding=MacRoman
6172 AppMain -Didea.launcher.port=7533 -Didea.launcher.bin.path=/Applications/IntelliJ IDEA 10.app/bin -Dfile.encoding=UTF-8
6175 Jps -Dapplication.home=/Library/Java/JavaVirtualMachines/1.6.0_31-b04-411.jdk/Contents/Home -Xms8m

    Then use 

    jstack 6172

    (6172 is id of your process) to get stack of threads inside jvm. Thread priority could be found from it. Sample output:

    .....
"main" **prio=5** tid=7ff255800800 nid=0x104bec000 waiting on condition [104beb000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
    at java.lang.Thread.sleep(Native Method)
    at au.com.byr.Sample.main(Sample.java:11)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

.....

    Enjoy!

    EDIT: If application running under different user than yourself (typical case on production and other non-local environments) then jps/jstack should be run via sudo. Examples:

    sudo jps -v

sudo jstack 6172
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