Deadlock reading GeoTiffs
-------------------------
Key: GEOT-3739
URL: https://jira.codehaus.org/browse/GEOT-3739
Project: GeoTools
Issue Type: Bug
Components: geotiff
Affects Versions: 2.7.2
Environment: Ubuntu 11.04
Java(TM) SE Runtime Environment (build 1.6.0_26-b03)
Reporter: Sheldon Young
Attachments: DeadlockExample.java
A deadlock occurs when several threads each create a GeoTiff reader. Simply
run the attached example and notice it never completes.
The first stack trace below is where most of the threads are blocked.
{noformat}
Thread [pool-1-thread-1] (Suspended)
LongitudeFirstEpsgDecorator(DeferredAuthorityFactory).getBackingStore()
line: 131
LongitudeFirstEpsgDecorator(BufferedAuthorityFactory).isAvailable()
line: 234
LongitudeFirstEpsgDecorator(DeferredAuthorityFactory).isAvailable()
line: 118
FactoryCreator(FactoryRegistry).isAvailable(Object) line: 666
FactoryCreator(FactoryRegistry).isAcceptable(T, Class<T>, Hints,
Filter) line: 500
FactoryRegistry$1.filter(Object) line: 191
FilterIterator<T>.advance() line: 793
FilterIterator<T>.next() line: 811
LazySet<E>.addNext() line: 71
LazySet<E>.get(int) line: 121
LazySet$Iter.next() line: 140
LinkedHashSet<E>(AbstractCollection<E>).addAll(Collection<? extends E>)
line: 305
AllAuthoritiesFactory.getFactories() line: 102
AllAuthoritiesFactory(ManyAuthoritiesFactory).getAuthorityFactory(Class<T>,
String) line: 421
AllAuthoritiesFactory(ManyAuthoritiesFactory).getCSAuthorityFactory(String)
line: 533
AllAuthoritiesFactory(AuthorityFactoryAdapter).createUnit(String) line:
779
GeoTiffMetadata2CRSAdapter.createUnit(int, int, Unit, Unit,
GeoTiffIIOMetadataDecoder) line: 1739
GeoTiffMetadata2CRSAdapter.createProjectedCoordinateSystem(GeoTiffIIOMetadataDecoder)
line: 284
GeoTiffMetadata2CRSAdapter.createCoordinateSystem(GeoTiffIIOMetadataDecoder)
line: 235
GeoTiffReader.getHRInfo(Hints) line: 301
GeoTiffReader.<init>(Object, Hints) line: 219
GeoTiffFormat.getReader(Object, Hints) line: 271
GeoTiffFormat.getReader(Object) line: 237
DeadlockExample.call() line: 39
FutureTask$Sync.innerRun() line: 303
FutureTask<V>.run() line: 138
ThreadPoolExecutor$Worker.runTask(Runnable) line: 886
ThreadPoolExecutor$Worker.run() line: 908
Thread.run() line: 662
{noformat}
This second stack trace is where one thread is blocked.
{noformat}
Thread [pool-1-thread-2] (Suspended)
ReferencingFactoryFinder.getAuthorityFactory(Class<T>, String, Hints,
Key) line: 216
ReferencingFactoryFinder.getCRSAuthorityFactory(String, Hints) line:
437
LongitudeFirstEpsgDecorator.createBackingStore() line: 177
LongitudeFirstEpsgDecorator(DeferredAuthorityFactory).getBackingStore()
line: 132
LongitudeFirstEpsgDecorator(BufferedAuthorityFactory).isAvailable()
line: 234
LongitudeFirstEpsgDecorator(DeferredAuthorityFactory).isAvailable()
line: 118
FactoryCreator(FactoryRegistry).isAvailable(Object) line: 666
FactoryCreator(FactoryRegistry).isAcceptable(T, Class<T>, Hints,
Filter) line: 500
FactoryRegistry$1.filter(Object) line: 191
FilterIterator<T>.advance() line: 793
FilterIterator<T>.next() line: 811
LazySet<E>.addNext() line: 71
LazySet<E>.get(int) line: 121
LazySet$Iter.next() line: 140
LinkedHashSet<E>(AbstractCollection<E>).addAll(Collection<? extends E>)
line: 305
AllAuthoritiesFactory.getFactories() line: 100
AllAuthoritiesFactory(ManyAuthoritiesFactory).getAuthorityFactory(Class<T>,
String) line: 421
AllAuthoritiesFactory(ManyAuthoritiesFactory).getCSAuthorityFactory(String)
line: 533
AllAuthoritiesFactory(AuthorityFactoryAdapter).createUnit(String) line:
779
GeoTiffMetadata2CRSAdapter.createUnit(int, int, Unit, Unit,
GeoTiffIIOMetadataDecoder) line: 1739
GeoTiffMetadata2CRSAdapter.createProjectedCoordinateSystem(GeoTiffIIOMetadataDecoder)
line: 284
GeoTiffMetadata2CRSAdapter.createCoordinateSystem(GeoTiffIIOMetadataDecoder)
line: 235
GeoTiffReader.getHRInfo(Hints) line: 301
GeoTiffReader.<init>(Object, Hints) line: 219
GeoTiffFormat.getReader(Object, Hints) line: 271
GeoTiffFormat.getReader(Object) line: 237
DeadlockExample.call() line: 39
FutureTask$Sync.innerRun() line: 303
FutureTask<V>.run() line: 138
ThreadPoolExecutor$Worker.runTask(Runnable) line: 886
ThreadPoolExecutor$Worker.run() line: 908
Thread.run() line: 662
{noformat}
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