RFR(XS): 8048050: Agent NullPointerException when rmi.port in use

[Jaroslav Bachorik]

Good to go.

-JB-

On 11/14/2014 02:07 PM, Sergey Gabdurakhmanov wrote:
> Hi,
>
> Could I please have a review of this small fix.
>
> webrev: http://cr.openjdk.java.net/~sgabdura/8048050/webrev.00/
> bug: https://bugs.openjdk.java.net/browse/JDK-8048050
>
> Problem description:
> If the com.sun.management.jmxremote.rmi.port option is provided it will
> give a NPE if already in use by a different JVM. Its expected to fail
> but should provide an appropriate exception.
>
> STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
> Run two instances in different JVMs at same time with the following
> options:
> -Dcom.sun.management.jmxremote.port=2222
> -Dcom.sun.management.jmxremote.rmi.port=2223
> -Dcom.sun.management.jmxremote.authenticate=false
>
> Root cause:
> Then we trying to start JMXConnectorServer (see method exportMBeanServer
> of class sun.management.jmxremote.ConnectorBootstrap on already used
> port it cause IOException. Call of connServer.getAddress().toString() in
> the exception handler cause NullPointerException because
> connServer.getAddress() returns null.
>
> Solution:
> Provide url.toString() if connServer.getAddress() is null
>
> I'm going to push this fix into JDK9, 8 and 7.
>
> BR,
> Sergey
>