30EA3- 2.*: Weird performance issues for editing objects

Question

Hi,
I noticed weird performance issues for editing objects: when right-clicking on them in the navigator tree and selecting Edit, you get the old progress dialog "Connected to database XXX". This stays on screen a lot longer than it ever did (last sequence I edited over 30 seconds!).
Cancelling displays a "Error retrieving schemas" dialog, but then opens the Edit dialog correctly. No further side effects noticed, so I think sqldev is adding useless overhead here.
If confirmed, can this be bugged and/or fixed by production?
Thanks,
K.

Answer 1

Yes, I mean in context of other hangs reported. This one is a nasty performance issue, but IMO the others are real show stoppers.
Atomic steps are easy; any* Edit (object) action inside the context menu of the navigator or the Edit button of the object viewer.
I took a lot of dumps (every second or so) and came to these findings:
Full thread dump Java HotSpot(TM) Client VM (14.2-b01 mixed mode):
"ProgressBarThread" prio=6 tid=0x049de000 nid=0x1674 runnable [0x056ff000]
   java.lang.Thread.State: RUNNABLE
        at oracle.jdbc.driver.T2CStatement.t2cDefineFetch(Native Method)
        at oracle.jdbc.driver.T2CPreparedStatement.doDefineFetch(T2CPreparedStatement.java:818)
        at oracle.jdbc.driver.T2CPreparedStatement.executeForRows(T2CPreparedStatement.java:746)
        at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1100)
        at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1186)
        at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3381)
        at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3425)
        - locked <0x1828f7f0> (a oracle.jdbc.driver.T2CConnection)
        at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeQuery(OraclePreparedStatementWrapper.java:1202)
        at oracle.javatools.db.execute.QueryWrapper.executeQueryImpl(QueryWrapper.java:280)
        at oracle.javatools.db.execute.QueryWrapper.access$000(QueryWrapper.java:76)
        at oracle.javatools.db.execute.QueryWrapper$QueryExecutionRunnable.runImpl(QueryWrapper.java:390)
        - locked <0x1828f7f0> (a oracle.jdbc.driver.T2CConnection)
        at oracle.javatools.db.execute.StatementWrapper$ExecutionRunnable.run(StatementWrapper.java:692)
        - locked <0x10c504c0> (a oracle.javatools.db.execute.QueryWrapper$QueryExecutionRunnable)
        at oracle.ideimpl.db.ProgressBarExecutionWrapper.runAndLog(ProgressBarExecutionWrapper.java:136)
        at oracle.ideimpl.db.ProgressBarExecutionWrapper.access$000(ProgressBarExecutionWrapper.java:38)
        at oracle.ideimpl.db.ProgressBarExecutionWrapper$R.run(ProgressBarExecutionWrapper.java:180)
        at oracle.ide.dialogs.ProgressBar.run(ProgressBar.java:655)
        at java.lang.Thread.run(Thread.java:619)
"pool-2-thread-2" prio=6 tid=0x06795400 nid=0xa58 waiting on condition [0x073ef000]
   java.lang.Thread.State: TIMED_WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x131fded0> (a java.util.concurrent.SynchronousQueue$TransferStack)
        at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:198)
        at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:424)
        at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:323)
        at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:874)
        at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:945)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
        at java.lang.Thread.run(Thread.java:619)
"pool-4-thread-1" prio=6 tid=0x06654400 nid=0xa08 waiting on condition [0x05dff000]
   java.lang.Thread.State: TIMED_WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x18334e28> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
        at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:198)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:1963)
        at java.util.concurrent.DelayQueue.take(DelayQueue.java:164)
        at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:583)
        at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:576)
        at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:947)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
        at java.lang.Thread.run(Thread.java:619)
"WeakDataReference polling" prio=2 tid=0x064de800 nid=0xc58 in Object.wait() [0x0eb3f000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
        - locked <0x18335088> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134)
        at oracle.ide.util.WeakDataReference$Cleaner.run(WeakDataReference.java:88)
        at java.lang.Thread.run(Thread.java:619)
"Background Parser" prio=6 tid=0x04decc00 nid=0x1248 waiting on condition [0x0ea3f000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
        at java.lang.Thread.sleep(Native Method)
        at oracle.dbtools.raptor.plsql.BackgroundParser$1.construct(BackgroundParser.java:112)
        at oracle.dbtools.raptor.utils.NamedSwingWorker$2.run(NamedSwingWorker.java:115)
        at java.lang.Thread.run(Thread.java:619)
"IconOverlayTracker Timer" prio=6 tid=0x063e5400 nid=0x16fc in Object.wait() [0x076ef000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:485)
        at java.util.TimerThread.mainLoop(Timer.java:483)
        - locked <0x180c2840> (a java.util.TaskQueue)
        at java.util.TimerThread.run(Timer.java:462)
"WaitCursor-Timer" prio=6 tid=0x04e39c00 nid=0x910 in Object.wait() [0x074ef000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:485)
        at java.util.TimerThread.mainLoop(Timer.java:483)
        - locked <0x1792d840> (a java.util.TaskQueue)
        at java.util.TimerThread.run(Timer.java:462)
"Native Directory Watcher" prio=2 tid=0x04e38400 nid=0x12b8 runnable [0x062ef000]
   java.lang.Thread.State: RUNNABLE
        at oracle.ide.natives.NativeHandler.enterWatcherThread(Native Method)
        at oracle.ide.natives.NativeHandler$2.run(NativeHandler.java:252)
        at java.lang.Thread.run(Thread.java:619)
"Background Parser" prio=6 tid=0x04d86c00 nid=0x12ac waiting on condition [0x061af000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
        at java.lang.Thread.sleep(Native Method)
        at oracle.dbtools.raptor.plsql.BackgroundParser$1.construct(BackgroundParser.java:112)
        at oracle.dbtools.raptor.utils.NamedSwingWorker$2.run(NamedSwingWorker.java:115)
        at java.lang.Thread.run(Thread.java:619)
"Background Parser" prio=6 tid=0x04d82800 nid=0x1240 waiting on condition [0x05eff000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
        at java.lang.Thread.sleep(Native Method)
        at oracle.dbtools.raptor.plsql.BackgroundParser$1.construct(BackgroundParser.java:112)
        at oracle.dbtools.raptor.utils.NamedSwingWorker$2.run(NamedSwingWorker.java:115)
        at java.lang.Thread.run(Thread.java:619)
"TextBufferScavenger" prio=6 tid=0x04d81400 nid=0x10ec in Object.wait() [0x05cff000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0x1729c0a8> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
        - locked <0x1729c0a8> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134)
        at oracle.ide.model.TextNode$FacadeBufferReference$PollingThread.run(TextNode.java:1949)
"BaseTreeExplorer.NodeOpeningExecutor" prio=6 tid=0x04ba0400 nid=0x11bc waiting on condition [0x05aff000]
   java.lang.Thread.State: WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x131a1910> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1925)
        at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:358)
        at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:947)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
        at java.lang.Thread.run(Thread.java:619)
"pool-2-thread-1" prio=6 tid=0x04c1c400 nid=0x11b8 waiting on condition [0x059ff000]
   java.lang.Thread.State: TIMED_WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x131fded0> (a java.util.concurrent.SynchronousQueue$TransferStack)
        at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:198)
        at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:424)
        at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:323)
        at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:874)
        at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:945)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
        at java.lang.Thread.run(Thread.java:619)
"Scheduler" daemon prio=6 tid=0x04b9a800 nid=0x11b0 in Object.wait() [0x058ff000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:485)
        at oracle.dbtools.raptor.backgroundTask.TaskLinkedList.takeNextTask(TaskLinkedList.java:47)
        - locked <0x131a1ba0> (a oracle.dbtools.raptor.backgroundTask.TaskLinkedList)
        at oracle.dbtools.raptor.backgroundTask.RaptorTaskManager$SchedulerThread.run(RaptorTaskManager.java:422)
"TimerQueue" daemon prio=6 tid=0x0445b000 nid=0x10fc in Object.wait() [0x057ff000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at javax.swing.TimerQueue.run(TimerQueue.java:236)
        - locked <0x12f7c028> (a javax.swing.TimerQueue)
        at java.lang.Thread.run(Thread.java:619)
"ChangeSetService" prio=2 tid=0x049d0800 nid=0x1060 in Object.wait() [0x053ff000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0x12e140c8> (a oracle.jdevimpl.vcs.changeset.ChangeSetService)
        at java.lang.Object.wait(Object.java:485)
        at oracle.jdevimpl.vcs.changeset.ChangeSetService.awaitEvents(ChangeSetService.java:178)
        - locked <0x12e140c8> (a oracle.jdevimpl.vcs.changeset.ChangeSetService)
        at oracle.jdevimpl.vcs.changeset.ChangeSetService.eventLoop(ChangeSetService.java:199)
        at oracle.jdevimpl.vcs.changeset.ChangeSetService.access$200(ChangeSetService.java:56)
        at oracle.jdevimpl.vcs.changeset.ChangeSetService$2.run(ChangeSetService.java:138)
        at java.lang.Thread.run(Thread.java:619)
"TimedCache-Timer" daemon prio=6 tid=0x03af9c00 nid=0x414 in Object.wait() [0x03fdf000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.util.TimerThread.mainLoop(Timer.java:509)
        - locked <0x12869c58> (a java.util.TaskQueue)
        at java.util.TimerThread.run(Timer.java:462)
"JarIndex Timer" daemon prio=6 tid=0x03945400 nid=0x171c in Object.wait() [0x042df000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.util.TimerThread.mainLoop(Timer.java:509)
        - locked <0x127d85a8> (a java.util.TaskQueue)
        at java.util.TimerThread.run(Timer.java:462)
"AWT-EventQueue-0" prio=6 tid=0x030f4800 nid=0x1684 in Object.wait() [0x041de000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:485)
        at java.awt.EventQueue.getNextEvent(EventQueue.java:479)
        - locked <0x127d8658> (a java.awt.EventQueue)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:236)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:178)
        at java.awt.Dialog$1.run(Dialog.java:1045)
        at java.awt.Dialog$3.run(Dialog.java:1097)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.awt.Dialog.show(Dialog.java:1095)
        at java.awt.Component.show(Component.java:1563)
        at java.awt.Component.setVisible(Component.java:1515)
        at java.awt.Window.setVisible(Window.java:841)
        at java.awt.Dialog.setVisible(Dialog.java:985)
        at oracle.bali.ewt.dialog.JEWTDialog.runDialog(JEWTDialog.java:395)
        at oracle.bali.ewt.dialog.JEWTDialog.runDialog(JEWTDialog.java:356)
        at oracle.ide.dialogs.ProgressBar.start(ProgressBar.java:352)
        at oracle.ide.dialogs.ProgressBar.start(ProgressBar.java:229)
        at oracle.ideimpl.db.ProgressBarExecutionWrapper.execute(ProgressBarExecutionWrapper.java:108)
        at oracle.javatools.db.execute.StatementWrapper$ExecutionProxy.doExecute(StatementWrapper.java:647)
        at oracle.javatools.db.execute.StatementWrapper$ExecutionProxy.access$200(StatementWrapper.java:585)
        at oracle.javatools.db.execute.StatementWrapper.doExecute(StatementWrapper.java:307)
        at oracle.javatools.db.execute.QueryWrapper.executeQuery(QueryWrapper.java:215)
        at oracle.javatools.db.dictionary.DictionaryDatabase.listObjectsImpl(DictionaryDatabase.java:323)
        at oracle.javatools.db.ora.BaseOracleDatabase.listObjectsImpl(BaseOracleDatabase.java:524)
        at oracle.javatools.db.AbstractDBObjectProvider.listSchemas(AbstractDBObjectProvider.java:859)
        at oracle.ide.db.dialogs.BaseDBEditorFactory.createNamespace(BaseDBEditorFactory.java:503)
        at oracle.ide.db.dialogs.BaseDBEditorFactory.editDBObject(BaseDBEditorFactory.java:357)
        at oracle.ide.db.dialogs.AbstractDBEditorFactory.editDBObject(AbstractDBEditorFactory.java:332)
        at oracle.ide.db.dialogs.BaseDBEditorFactory.editDBObject(BaseDBEditorFactory.java:54)
        at oracle.ide.db.dialogs.AbstractDBEditorFactory.editDBObject(AbstractDBEditorFactory.java:314)
        at oracle.dbtools.raptor.utils.DataBaseNodeUtil.editNodeWizard(DataBaseNodeUtil.java:45)
        at oracle.dbtools.raptor.oviewer.xmleditor.XMLBasedEditor.handleEvent(XMLBasedEditor.java:152)
        at oracle.ide.controller.IdeAction.performAction(IdeAction.java:531)
        at oracle.ide.controller.IdeAction.actionPerformedImpl(IdeAction.java:886)
        at oracle.ide.controller.IdeAction.actionPerformed(IdeAction.java:503)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
        at javax.swing.AbstractButton$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:2475)
        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-Shutdown" prio=4 tid=0x030e6400 nid=0x1680 in Object.wait() [0x040df000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:485)
        at sun.awt.AWTAutoShutdown.run(AWTAutoShutdown.java:259)
        - locked <0x127d8718> (a java.lang.Object)
        at java.lang.Thread.run(Thread.java:619)
"AWT-Windows" daemon prio=6 tid=0x03abb400 nid=0x1610 runnable [0x03edf000]
   java.lang.Thread.State: RUNNABLE
        at sun.awt.windows.WToolkit.eventLoop(Native Method)
        at sun.awt.windows.WToolkit.run(WToolkit.java:291)
        at java.lang.Thread.run(Thread.java:619)
"Java2D Disposer" daemon prio=10 tid=0x03a97400 nid=0x15f8 in Object.wait() [0x03cdf000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
        - locked <0x127d8810> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134)
        at sun.java2d.Disposer.run(Disposer.java:125)
        at java.lang.Thread.run(Thread.java:619)
"Low Memory Detector" daemon prio=6 tid=0x030d1c00 nid=0x15dc runnable [0x00000000]
   java.lang.Thread.State: RUNNABLE
"CompilerThread0" daemon prio=10 tid=0x030cb800 nid=0x15d8 waiting on condition [0x00000000]
   java.lang.Thread.State: RUNNABLE
"Attach Listener" daemon prio=10 tid=0x030ca000 nid=0x15d4 runnable [0x00000000]
   java.lang.Thread.State: RUNNABLE
"Signal Dispatcher" daemon prio=10 tid=0x030c8c00 nid=0x15d0 waiting on condition [0x00000000]
   java.lang.Thread.State: RUNNABLE
"Finalizer" daemon prio=8 tid=0x030b9c00 nid=0x15c8 in Object.wait() [0x0343f000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
        - locked <0x12770298> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134)
        at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)
"Reference Handler" daemon prio=10 tid=0x030b5000 nid=0x15c4 in Object.wait() [0x0333f000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:485)
        at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116)
        - locked <0x12770320> (a java.lang.ref.Reference$Lock)
"main" prio=6 tid=0x00967800 nid=0x1504 waiting on condition [0x00000000]
   java.lang.Thread.State: RUNNABLE
"VM Thread" prio=10 tid=0x030b1000 nid=0x15c0 runnable
"VM Periodic Task Thread" prio=10 tid=0x030d3c00 nid=0x15e0 waiting on condition
JNI global references: 2645
Heap
def new generation   total 12544K, used 6205K [0x10010000, 0x10da0000, 0x12770000)
  eden space 11200K,  53% used [0x10010000, 0x105e2ff0, 0x10b00000)
  from space 1344K,  18% used [0x10c50000, 0x10c8c7b8, 0x10da0000)
  to   space 1344K,   0% used [0x10b00000, 0x10b00000, 0x10c50000)
tenured generation   total 165468K, used 99280K [0x12770000, 0x1c907000, 0x30010000)
   the space 165468K,  59% used [0x12770000, 0x18864308, 0x18864400, 0x1c907000)
compacting perm gen  total 50432K, used 50210K [0x30010000, 0x33150000, 0x38010000)
   the space 50432K,  99% used [0x30010000, 0x33118aa8, 0x33118c00, 0x33150000)
No shared spaces configured.- In the beginning of the waiting time, the "locked <0x10c504c0>" in the "ProgressBarThread" changed (at least once) to "locked <0x10c51da0>".
- Then halfway the waiting time, the "pool-2-thread-1" disappeared, then "pool-2-thread-2" shortly after.
- Then the "TimedCache-Timer" changed to
"TimedCache-Timer" daemon prio=6 tid=0x03af9c00 nid=0x414 in Object.wait() [0x03fdf000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:485)
        at java.util.TimerThread.mainLoop(Timer.java:483)
        - locked <0x12869c58> (a java.util.TaskQueue)
        at java.util.TimerThread.run(Timer.java:462)- Then near the end, the "locked <0x10c51da0>" in the "ProgressBarThread" changed to "locked <0x10b01da0>", then to "locked <0x10c51da0>".
Hope that helps,
K.