cannot start jstatd due to permission error

Question

I try to run jstatd jvm monitoring tool on linux machine

jboss@hostAddr:/usr/java/jdk1.6.0_18/bin> uname -a
Linux hostAddr 2.6.16.60-0.34-smp #1 SMP Fri J         


        

Answer 1

Just an additional point about previous answers that cost me some minor time to figure out.
When I used relative path in the policy file ${java.home}/lib/tools.jar it actually pointed jstatd to JAVA_HOME/jre/ directory and since I had jdk installed I had to use ${java.home}/../lib/tools.jar instead to get to the right place.

EDIT I was running jstatd from within a docker container running ubuntu with jdk 8 (JAVA_HOME was set correctly).

Answer 2

Just found following script to run jstatd. I managed to run jstatd with this script https://gist.github.com/nicerobot/1375032

#!/bin/sh
policy=${HOME}/.jstatd.all.policy
[ -r ${policy} ] || cat >${policy} <<'POLICY'
grant codebase "file:${java.home}/../lib/tools.jar" {
permission java.security.AllPermission;
};
POLICY

jstatd -J-Djava.security.policy=${policy} &

Answer 3

I created new policy with following content:

grant codebase "file:/usr/java/latest/lib/tools.jar" { permission java.security.AllPermission; };

and then start jstatd with that policy with following command:

jstatd -J-Djava.security.policy=/usr/java/jstatd.all.policy &

Answer 4

Or you can use ejstatd instead of jstatd which automatically handles this problem: just run it using mvn exec:java inside ejstatd folder.

Disclaimer: I'm the author of this open source tool.

Answer 5

I have the same problem and that what you should do:

1. Make sure that javac is in your $PATH
2. Specify full (absolute) path to the policy file when running jstatd
   jstatd -J-Djava.security.policy=/path/to/jstatd.all.policy

It helped for me.