RFR: 6696975: JTop plugin fails if connected readonly to target JVM

[Jaroslav Bachorik]

The change looks ok (not a reviewer). Even though printing a stack trace
is not the most user friendly way to deal with an exception it is
consistent with the exception handling in the rest of the plugin.

-JB-

On 08/06/2013 08:53 PM, Erik Gahlin wrote:
> Please review this change.
> 
> ThreadMXBean#setThreadCpuTimeEnabled(true) assumes read-write access to
> the underlying JVM, but if read-access is only available plug-in will
> fail and throw an exception.
> http://monaco.us.oracle.com/detail.jsf?cr=6696975
> 
> Unexpected exceptions occurring in JConsole are taken care of by
> 6696970, but plug-in should still handle read-only access gracefully, as
> it today does if functionality is not supported by JVM. This can be
> important if plug-in is used by other programs.
> 
> Webrev:
> http://cr.openjdk.java.net/~egahlin/6696975/
> 
> A sponsor is needed
> 
> Thanks
> Erik