RFR [9] 8160513: ClassNotFoundException sun.misc.GC when running Tomcat 9 with JDK 9

Mark Sheppard mark.sheppard at oracle.com
Wed Jul 27 15:13:02 UTC 2016

Hi Chris,

change looks good to me.

just to clarify, the ClassNotFoundException in this instance is due to 
the migration of
sun.misc.GC to sun.rmi.transport.GC.

from a more general scope,
the change to the latter is to relieve JreMemoryLeakPreventionListener 
of the need to
perform reflective access on this GC class, and  hence mitigates any 
potential memory leak JDK-8157570
posed in the Daemon thread of sun.rmi.transport.GC


On 26/07/2016 16:24, Chris Hegarty wrote:
> The GC.Daemon thread has no need of any user defined class loader,
> so should set its context class loader to null before starting, so as to
> not inadvertently retain a reference to the creating thread’s context
> class loader.
> http://cr.openjdk.java.net/~chegar/8160513/
> https://bugs.openjdk.java.net/browse/JDK-8160513
> -Chris.
> P.S. I added a detailed comment the JIRA issue, for those wondering
> why Tomcat is running into this.

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