On 31.05.10 05:46, Hawkx wrote:
Maybe there is a problem on you machine, or maybe it is a bug in Derby.
It would be helpful if you could do what Bryan suggested - obtain the
stack trace from the Java process when it is hanging.
Besides from what Bryan mentioned, you can also use jstack (or visualvm)
to do this.
jstack message while blocking:
Hi,
I can't see why this shouldn't work, and I'm afraid I only have some
more general comments and suggestions:
- should we add a timeout to the socket creation in the various
commands? (ping(), sysinfo(), etc)
- when the application is hanging, are you able to connect to the
network server using a separate process, like ij?
- what happens if you start the network server stand alone? Is the
application then able to complete the sysinfo-call?
As far as I can see, the sysinfo-call is awaiting a response from the
server.
The server process accepting connections (ClientThread) is still doing
ServerSocket.accept().
Could this be a threading problem because of AWT? (i.e., another task is
waiting for the event queue, which is stuck in the socket call?)
--
Kristian
2010-05-31 11:42:35
Full thread dump Java HotSpot(TM) Client VM (16.2-b04 mixed mode, sharing):
"NetworkServerThread_4" daemon prio=6 tid=0x02ed6800 nid=0x33c8 runnable
[0x0481f000]
java.lang.Thread.State: RUNNABLE
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:390)
- locked<0x22ad2c08> (a java.net.SocksSocketImpl)
at java.net.ServerSocket.implAccept(ServerSocket.java:453)
at java.net.ServerSocket.accept(ServerSocket.java:421)
at org.apache.derby.impl.drda.ClientThread$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.derby.impl.drda.ClientThread.run(Unknown Source)
"derby.NetworkServerStarter" daemon prio=6 tid=0x02ed0400 nid=0x25ac in
Object.wait() [0x045ef000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on<0x22ab0598> (a java.lang.Object)
at java.lang.Object.wait(Object.java:485)
at
org.apache.derby.impl.drda.NetworkServerControlImpl.blockingStart(Unknown
Source)
- locked<0x22ab0598> (a java.lang.Object)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.derby.iapi.jdbc.DRDAServerStarter.run(Unknown Source)
at java.lang.Thread.run(Thread.java:619)
"Timer-0" daemon prio=6 tid=0x02f93800 nid=0x2c80 in Object.wait()
[0x0459f000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on<0x22a01958> (a java.util.TaskQueue)
at java.lang.Object.wait(Object.java:485)
at java.util.TimerThread.mainLoop(Timer.java:483)
- locked<0x22a01958> (a java.util.TaskQueue)
at java.util.TimerThread.run(Timer.java:462)
"derby.antiGC" daemon prio=2 tid=0x02c15c00 nid=0x5388 in Object.wait()
[0x03f1f000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on<0x28095170> (a
org.apache.derby.impl.services.monitor.AntiGC)
at java.lang.Object.wait(Object.java:485)
at org.apache.derby.impl.services.monitor.AntiGC.run(Unknown Source)
- locked<0x28095170> (a org.apache.derby.impl.services.monitor.AntiGC)
at java.lang.Thread.run(Thread.java:619)
"TimerQueue" daemon prio=6 tid=0x02f0cc00 nid=0x165c in Object.wait()
[0x0380f000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on<0x280951e8> (a javax.swing.TimerQueue)
at javax.swing.TimerQueue.run(TimerQueue.java:232)
- locked<0x280951e8> (a javax.swing.TimerQueue)
at java.lang.Thread.run(Thread.java:619)
"D3D Screen Updater" daemon prio=8 tid=0x02f71800 nid=0x20b8 in
Object.wait() [0x03f7f000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on<0x28015448> (a java.lang.Object)
at
sun.java2d.d3d.D3DScreenUpdateManager.run(D3DScreenUpdateManager.java:421)
- locked<0x28015448> (a java.lang.Object)
at java.lang.Thread.run(Thread.java:619)
"DestroyJavaVM" prio=6 tid=0x00316800 nid=0x2c84 waiting on condition
[0x00000000]
java.lang.Thread.State: RUNNABLE
"AWT-EventQueue-0" prio=6 tid=0x02c3ec00 nid=0x223c runnable [0x034ce000]
java.lang.Thread.State: RUNNABLE
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:129)
at java.net.SocksSocketImpl.readSocksReply(SocksSocketImpl.java:88)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:429)
at java.net.Socket.connect(Socket.java:529)
at java.net.Socket.connect(Socket.java:478)
at java.net.Socket.<init>(Socket.java:375)
at java.net.Socket.<init>(Socket.java:218)
at javax.net.DefaultSocketFactory.createSocket(SocketFactory.java:212)
at org.apache.derby.impl.drda.NetworkServerControlImpl$6.run(Unknown
Source)
at java.security.AccessController.doPrivileged(Native Method)
at
org.apache.derby.impl.drda.NetworkServerControlImpl.setUpSocket(Unknown
Source)
at org.apache.derby.impl.drda.NetworkServerControlImpl.sysinfo(Unknown
Source)
at org.apache.derby.drda.NetworkServerControl.getSysinfo(Unknown Source)
at
testderbyblocking.TestDerbyBlockingView.tetstDerbyBlocking(TestDerbyBlockingView.java:212)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.jdesktop.application.ApplicationAction.noProxyActionPerformed(ApplicationAction.java:662)
at
org.jdesktop.application.ApplicationAction.actionPerformed(ApplicationAction.java:698)
at
javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at
javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at
javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at
javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at
javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at
java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
at java.awt.Component.processMouseEvent(Component.java:6263)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6028)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4630)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4460)
at
java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2478)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at
java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
"AWT-Windows" daemon prio=6 tid=0x02c3d400 nid=0xd10 runnable [0x0323f000]
java.lang.Thread.State: RUNNABLE
at sun.awt.windows.WToolkit.eventLoop(Native Method)
at sun.awt.windows.WToolkit.run(WToolkit.java:295)
at java.lang.Thread.run(Thread.java:619)
"AWT-Shutdown" prio=6 tid=0x02c3bc00 nid=0x4820 in Object.wait()
[0x031ef000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on<0x27f96ff0> (a java.lang.Object)
at java.lang.Object.wait(Object.java:485)
at sun.awt.AWTAutoShutdown.run(AWTAutoShutdown.java:265)
- locked<0x27f96ff0> (a java.lang.Object)
at java.lang.Thread.run(Thread.java:619)
"Java2D Disposer" daemon prio=10 tid=0x02c3b800 nid=0xac in Object.wait()
[0x0319f000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on<0x27f97080> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
- locked<0x27f97080> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134)
at sun.java2d.Disposer.run(Disposer.java:125)
at java.lang.Thread.run(Thread.java:619)
"Low Memory Detector" daemon prio=6 tid=0x02ba9800 nid=0x4920 runnable
[0x00000000]
java.lang.Thread.State: RUNNABLE
"CompilerThread0" daemon prio=10 tid=0x02ba3800 nid=0x2984 waiting on
condition [0x00000000]
java.lang.Thread.State: RUNNABLE
"Attach Listener" daemon prio=10 tid=0x02ba2000 nid=0x2cf4 waiting on
condition [0x00000000]
java.lang.Thread.State: RUNNABLE
"Signal Dispatcher" daemon prio=10 tid=0x02ba0c00 nid=0x525c runnable
[0x00000000]
java.lang.Thread.State: RUNNABLE
"Finalizer" daemon prio=8 tid=0x02b60000 nid=0x336c in Object.wait()
[0x02d2f000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on<0x27f972b0> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
- locked<0x27f972b0> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)
"Reference Handler" daemon prio=10 tid=0x02b5b400 nid=0x4804 in
Object.wait() [0x02cdf000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on<0x27f96df0> (a java.lang.ref.Reference$Lock)
at java.lang.Object.wait(Object.java:485)
at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116)
- locked<0x27f96df0> (a java.lang.ref.Reference$Lock)
"VM Thread" prio=10 tid=0x02b5a000 nid=0x125c runnable
"VM Periodic Task Thread" prio=10 tid=0x02bb9000 nid=0x534 waiting on
condition
JNI global references: 1267
