On Feb 19, 2008, at 8:59 AM, Fabrice Pipart wrote:
Hi !
I am experiencing very annoying deadlock that happen both in
development and deployment situations under load situations.
It happens randomly. Progressively all threads go into deadlock.
They all block on the same method :
[1] sun.misc.Unsafe.park (native method)
I cannot understand why :-(
We use autolock from Project Wonder with the four magic lines in
Properties.
Both the WorkerThreads and the Background threads block on this
with varying stack traces (or at least I could not determine what
is in common) :
Are there any other traces? I looks like something is locking the
EOObjectStoreCoordinator and not unlocking it. I could be a bug in
WO 5.4 or it could be some place in your code where you are manually
locking, an EODatabaseContext for example, and the unlock is not
happening.
Chuck
AThreadLaunchedFromAWorkerThread
[1] sun.misc.Unsafe.park (native method)
[2] java.util.concurrent.locks.LockSupport.park (LockSupport.java:
118)
[3]
java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInte
rrupt (AbstractQueuedSynchronizer.java:716)
[4]
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued
(AbstractQueuedSynchronizer.java:746)
[5] java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire
(AbstractQueuedSynchronizer.java:1,076)
[6] java.util.concurrent.locks.ReentrantLock$NonfairSync.lock
(ReentrantLock.java:184)
[7] java.util.concurrent.locks.ReentrantLock.lock
(ReentrantLock.java:256)
[8] com.webobjects.eocontrol.EOObjectStoreCoordinator.lock
(EOObjectStoreCoordinator.java:420)
[9] com.webobjects.eocontrol.EOEditingContext.lockObjectStore
(EOEditingContext.java:4,650)
[10] com.webobjects.eocontrol.EOEditingContext.faultForGlobalID
(EOEditingContext.java:3,606)
[11] er.extensions.ERXEC.faultForGlobalID (ERXEC.java:972)
[12] com.webobjects.eoaccess.EOUtilities.localInstanceOfObject
(EOUtilities.java:989)
...
WorkerThread4:
[1] sun.misc.Unsafe.park (native method)
[2] java.util.concurrent.locks.LockSupport.park (LockSupport.java:
118)
[3]
java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInte
rrupt (AbstractQueuedSynchronizer.java:716)
[4]
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued
(AbstractQueuedSynchronizer.java:746)
[5] java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire
(AbstractQueuedSynchronizer.java:1,076)
[6] java.util.concurrent.locks.ReentrantLock$NonfairSync.lock
(ReentrantLock.java:184)
[7] java.util.concurrent.locks.ReentrantLock.lock
(ReentrantLock.java:256)
[8] com.webobjects.eocontrol.EOObjectStoreCoordinator.lock
(EOObjectStoreCoordinator.java:420)
[9] com.webobjects.eocontrol.EOEditingContext.lockObjectStore
(EOEditingContext.java:4,650)
[10]
com.webobjects.eocontrol.EOEditingContext.objectsWithFetchSpecificatio
n (EOEditingContext.java:4,051)
[11] er.extensions.ERXEC.objectsWithFetchSpecification
(ERXEC.java:1,068)
[12]
com.webobjects.eocontrol.EOEditingContext.objectsWithFetchSpecificatio
n (EOEditingContext.java:4,428)
...
It happens under 10.5.1 and 10.5.2 and WebObjects 5.4.0 and 5.4.1
Anyone experienced this?
Anyone has an idea how this can be happening?
Best regards
Fabrice Pipart
www.easyshadow.com
EasyMediaOnline
Digital Signage Software
Easyshadow
Palais de la Scala
1 avenue Henri Dunant
Suite 1155
MC - 98000 Monaco
Skype: fabrice.pipart
Tel. +377 97 98 21 04 (direct)
Fax. +377 97 70 88 07
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Webobjects-dev mailing list ([email protected])
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/webobjects-dev/chill%
40global-village.net
This email sent to [EMAIL PROTECTED]
--
Practical WebObjects - for developers who want to increase their
overall knowledge of WebObjects or who are trying to solve specific
problems.
http://www.global-village.net/products/practical_webobjects
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Webobjects-dev mailing list ([email protected])
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com
This email sent to [EMAIL PROTECTED]
