Dispose JDI will hang at some situation

Question

I'm working with JDI, and find out that call com.sun.jdi.VirtualMachine#dispose will hang at some situation.

The thread stack is :

 "qtp1764345202-39" prio=5 tid=0x00007f830a14f000 nid=0x10d03 in Object.wait() [0x0000000128ea6000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0x00000007039b1f40> (a com.sun.tools.jdi.Packet)
        at java.lang.Object.wait(Object.java:503)
        at com.sun.tools.jdi.TargetVM.waitForReply(TargetVM.java:300)
        - locked <0x00000007039b1f40> (a com.sun.tools.jdi.Packet)
        at com.sun.tools.jdi.VirtualMachineImpl.waitForTargetReply(VirtualMachineImpl.java:1036)
        at com.sun.tools.jdi.PacketStream.waitForReply(PacketStream.java:69)
        at com.sun.tools.jdi.JDWP$VirtualMachine$Dispose.waitForReply(JDWP.java:445)
        at com.sun.tools.jdi.JDWP$VirtualMachine$Dispose.process(JDWP.java:431)
        at com.sun.tools.jdi.VirtualMachineImpl.dispose(VirtualMachineImpl.java:555)

and from decompiled code, I saw this:

void waitForReply(Packet var1) {
    synchronized(var1) {
        while(!var1.replied && this.shouldListen) {
            try {
                var1.wait();
            } catch (InterruptedException var5) {
                ;
            }
        }

        if(!var1.replied) {
            throw new VMDisconnectedException();
        }
    }
}

It's seem that there is a deadlock here, it's this a JDK bug? I'm using Hotspot JDK 7.

java version "1.7.0_79" Java(TM) SE Runtime Environment (build 1.7.0_79-b15) Java HotSpot(TM) 64-Bit Server VM (build 24.79-b02, mixed mode)

Dispose JDI will hang at some situation

0 Answers0