native jdk release schedule question

[Panagiotis Astithas]

Nick Johnson wrote:
> FWIW, it looks like the trouble comes from
> hotspot/src/share/vm/prims/jvmdi.cpp because monitor->monitor().raw_notify
> (or raw_wait or raw_notifyAll or raw_exit) is returning
> ObjectMonitor::OM_ILLEGAL_MONITOR_STATE.
> 
> That seems to be triggered from
> hotspot/src/os/bsd/vm/objectMonitor_bsd.cpp like this:
> 
>  int ObjectMonitor::raw_notify(TRAPS) {
>    if (THREAD != _owner) {
>      return OM_ILLEGAL_MONITOR_STATE;
>    }
> 
> So at first glance it looks like a thread ownership problem.  Don't have
> time to dig any deeper ATM.

The funny thing is that the behavior is not consistent:

edgar% cat dummy.java
class dummy { public static void main(String[] args) {} }
edgar% javac dummy.java
edgar% java dummy
edgar% jdb dummy
Initializing jdb ...
 > run
run dummy
java.io.IOException: Target failed to handshake.
         at 
com.sun.tools.jdi.VirtualMachineManagerImpl.handshake(VirtualMachineManagerImpl.java:190)
         at 
com.sun.tools.jdi.VirtualMachineManagerImpl.createVirtualMachine(VirtualMachineManagerImpl.java:201)
         at 
com.sun.tools.jdi.AbstractLauncher.launch(AbstractLauncher.java:107)
         at 
com.sun.tools.jdi.SunCommandLineLauncher.launch(SunCommandLineLauncher.java:144)
         at 
com.sun.tools.example.debug.tty.VMConnection.launchTarget(VMConnection.java:333)
         at 
com.sun.tools.example.debug.tty.VMConnection.open(VMConnection.java:166)
         at 
com.sun.tools.example.debug.tty.Commands.commandRun(Commands.java:547)
         at com.sun.tools.example.debug.tty.TTY.executeCommand(TTY.java:299)
         at com.sun.tools.example.debug.tty.TTY.<init>(TTY.java:539)
         at com.sun.tools.example.debug.tty.TTY.main(TTY.java:850)

Fatal error:
Unable to launch target VM.


I was usually getting the previous error that I mentioned, but the last 
6-7 runs consistently give me this output. It could be some sort of heap 
corruption or something like that. The machine is a July 10 -CURRENT.

Rebuilding the jdk with WITH_DEBUG is going to take the rest of the day 
on my system, but since I am leaving on vacation in a few hours, it will 
have to wait :-)

Cheers,
-- 
Panagiotis Astithas, PhD
R&D Manager
EBS, Electronic Business Systems Ltd.
18 Evgenidou Street, 115 25, Athens GREECE
Phone: +30 210 674 7631
Fax: +30 210 674 7601
http://www.ebs.gr