This would be useful to analyze a root cause, when an
application has suddenly stopped working or not responding . There could be a
some kind of deadlock or waiting processes or something else.
JStack would help
in getting the stack dump to a currently running java process.
JStack comes along with JDK kit, need not to install separately.
Go to command prompt, type below command with java process
id.
>jstack <pid>
To identify the java process id, you can 'jps' command.
>jps => this
will list out the all java process id's.
Output:
5730 main => this
is my java process id.
10800 jps
8732
To get more details about which process ID belongs to which process use below command
> jps -ml
To get the additional information about the locks.
>jps -l <pid>
Jstack can also be used to get the thread dump for remotely
running processes.
>jps <remote
host name/ip address>
To write stack dump to a file:
>jstack -l 7840 >
D:\Test\kklog.txt
">" is important to write into a file.
Some useful resources on this.
http://www.ibm.com/developerworks/library/j-5things8/
http://docs.oracle.com/javase/7/docs/technotes/tools/share/jstack.html
