rkeen-siemens commented on issue #9490:
URL: https://github.com/apache/netbeans/issues/9490#issuecomment-4905476364
I've also seen the main thread blocked waiting for the logger queue to be
emptied but the log flush thread was blocked on the main thread.
```
Thread [main] (Suspended)
owns: Object (id=31)
waited by: System Thread [Logging Flush] (Suspended)
Unsafe.park(boolean, long) line: not available [native method]
28 collapsed frames
LockSupport.park() line: 369
AbstractQueuedSynchronizer$ConditionNode.block() line: 520
ForkJoinPool.unmanagedBlock(ForkJoinPool$ManagedBlocker) line:
4364
ForkJoinPool.managedBlock(ForkJoinPool$ManagedBlocker) line:
4310
AbstractQueuedSynchronizer$ConditionObject.await() line: 1752
LinkedBlockingQueue<E>.put(E) line: 343
DispatchingHandler.publish(LogRecord) line: 64
Logger.log(LogRecord) line: 962
Logger.doLog(LogRecord) line: 989
Logger.log(Level, String) line: 1012
Logger.fine(String) line: 1811
StandardModule.loadManifest() line: 246
StandardModule.getManifest() line: 107
StandardModule(Module).dataWithCheck() line: 158
ModuleFactory.create(File, Object, boolean, boolean, boolean,
ModuleManager, Events) line: 53
ModuleManager.create(File, Object, boolean, boolean, boolean)
line: 821
ModuleList.createModule(File, ModuleHistory, boolean, boolean,
boolean, Integer) line: 163
ModuleList$ReadInitial.run() line: 1646
EventControl.runAtomicAction(FileSystem$AtomicAction) line: 102
SystemFileSystem(FileSystem).runAtomicAction(FileSystem$AtomicAction) line: 494
ModuleList.readInitial() line: 147
ModuleSystem.readList() line: 283
Main.getModuleSystem(boolean) line: 172
Main.getModuleSystem() line: 142
Main.start(String[]) line: 303
TopThreadGroup.run() line: 97
Thread.runWith(Object, Runnable) line: 1487
Thread.run() line: 1474
System Thread [Logging Flush] (Suspended)
owns: HashSet<E> (id=32)
owns: ProxyLookup (id=33)
owns: MainLookup (id=34)
owns: MessagesHandler (id=35)
waiting for: Object (id=31)
owned by: Thread [main] (Suspended)
StandardModule(Module).dataWithCheck() line: 139
34 collapsed frames
StandardModule(Module).data() line: 132
StandardModule(Module).getCodeNameBase() line: 260
StandardModule.toString() line: 575
String.valueOf(Object) line: 4530
StringBuilder.append(Object) line: 173
HashSet<E>(AbstractCollection<E>).toString() line: 459
String.valueOf(Object) line: 4530
Util$ModuleLookup.toString() line: 504
String.valueOf(Object) line: 4530
StringBuilder.append(Object) line: 173
Arrays$ArrayList<E>(AbstractCollection<E>).toString() line: 459
String.valueOf(Object) line: 4530
StringBuilder.append(Object) line: 173
ProxyLookup.toString() line: 91
String.valueOf(Object) line: 4530
StringBuilder.append(Object) line: 173
Arrays$ArrayList<E>(AbstractCollection<E>).toString() line: 459
String.valueOf(Object) line: 4530
StringBuilder.append(Object) line: 173
MainLookup(ProxyLookup).toString() line: 91
MessageFormat.subformat(Object[], StringBuf, FieldPosition,
List<AttributedCharacterIterator>) line: 1539
MessageFormat.format(Object, Format$StringBuf, FieldPosition)
line: 1093
MessageFormat(Format).format(Object) line: 165
MessageFormat.format(String, Object...) line: 1059
NbFormatter(Formatter).formatMessage(LogRecord) line: 141
NbFormatter.print(StringBuilder, LogRecord, Set<Throwable>)
line: 59
NbFormatter.format(LogRecord) line: 45
MessagesHandler(StreamHandler).publish(LogRecord) line: 207
MessagesHandler.publish(LogRecord) line: 115
DispatchingHandler.run() line: 152
RequestProcessor$Task.run() line: 1519
GlobalLookup.execute(Lookup, Runnable) line: 45
Lookups.executeWith(Lookup, Runnable) line: 287
RequestProcessor$Processor.run() line: 2141
```
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