RFR: 8046778 Better error messages when starting JMX agent via attach or jcmd

[Staffan Larsen]

This change is still looking for a reviewer.

Thanks,
/Staffan

On 13 jun 2014, at 13:03, Staffan Larsen <staffan.larsen at oracle.com> wrote:

> 
> When starting the JMX agent via jcmd, the error messages you get are very cryptic: 
> 
> $ build/macosx-x86_64-normal-server-release/jdk/bin/jcmd Sleeper ManagementAgent.start 
> 9979: 
> java.lang.RuntimeException: Invalid option specified 
> 
> $ build/macosx-x86_64-normal-server-release/jdk/bin/jcmd Sleeper ManagementAgent.start config.file=apa 
> 10024: 
> java.lang.RuntimeException: Config file not found 
> 
> $ build/macosx-x86_64-normal-server-release/jdk/bin/jcmd Sleeper ManagementAgent.start jmxremote.port=5000 
> 9979: 
> sun.management.AgentConfigurationError 
> 
> 
> This is just because errors are note propagated correctly to the jcmd. With some small changes the above can look like this: 
> 
> $ build/macosx-x86_64-normal-server-release/jdk/bin/jcmd Sleeper ManagementAgent.start 
> 89673: 
> java.lang.RuntimeException: Invalid com.sun.management.jmxremote.port number: No port specified 
> 
> $ build/macosx-x86_64-normal-server-release/jdk/bin/jcmd Sleeper ManagementAgent.start config.file=apa 
> 89673: 
> java.lang.RuntimeException: Config file not found: apa 
> 
> $ build/macosx-x86_64-normal-server-release/jdk/bin/jcmd Sleeper ManagementAgent.start jmxremote.port=5000 
> 89673: 
> java.lang.RuntimeException: Password file not found: /Users/staffan/mercurial/jdk9-hs-rt/build/macosx-x86_64-normal-server-release/jdk/lib/management/jmxremote.password
> 
> webrev: http://cr.openjdk.java.net/~sla/8046778/webrev.00/
> bug: https://bugs.openjdk.java.net/browse/JDK-8046778
> 
> Thanks,
> /Staffan
>