Hey All (cross posted as I'm not sure where the answer will come from),
versions:
- fileinstall 3.4.0
- equinox 3.8.0.v20120529-1548
I'm seeing a deadlock where on first start the fileinstall bundle is
getting stuck with itself
as per the following two stack traces:
"Refresh Packages" daemon prio=10 tid=0x00007fc29c0f6800 nid=0x94c
waiting on condition [0x00007fc2b9c15000]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00000000c095f950> (a
java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:867)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1197)
at
java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock.lock(ReentrantReadWriteLock.java:945)
at
org.apache.felix.fileinstall.internal.FileInstall.stop(FileInstall.java:171)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl$2.run(BundleContextImpl.java:771)
at java.security.AccessController.doPrivileged(Native Method)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl.stop(BundleContextImpl.java:764)
at
org.eclipse.osgi.framework.internal.core.BundleHost.stopWorker(BundleHost.java:510)
at
org.eclipse.osgi.framework.internal.core.AbstractBundle.suspend(AbstractBundle.java:566)
at
org.eclipse.osgi.framework.internal.core.Framework.suspendBundle(Framework.java:1207)
at
org.eclipse.osgi.framework.internal.core.PackageAdminImpl.suspendBundle(PackageAdminImpl.java:326)
at
org.eclipse.osgi.framework.internal.core.PackageAdminImpl.processDelta(PackageAdminImpl.java:467)
at
org.eclipse.osgi.framework.internal.core.PackageAdminImpl.doResolveBundles(PackageAdminImpl.java:251)
- locked <0x00000000c0cbc1f8> (a
org.eclipse.osgi.framework.internal.core.PackageAdminImpl)
at
org.eclipse.osgi.framework.internal.core.PackageAdminImpl$1.run(PackageAdminImpl.java:174)
at java.lang.Thread.run(Thread.java:744)
Locked ownable synchronizers:
- None
"fileinstall-/home/rotty/AS/liferay-portal/osgi/portal" daemon prio=10
tid=0x00007fc2ac01a000 nid=0x920 waiting on condition
[0x00007fc2ba721000]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00000000c51bd048> (a
java.util.concurrent.CountDownLatch$Sync)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:994)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1303)
at java.util.concurrent.CountDownLatch.await(CountDownLatch.java:236)
at
org.apache.felix.fileinstall.internal.FileInstall.refresh(FileInstall.java:319)
at
org.apache.felix.fileinstall.internal.DirectoryWatcher.refresh(DirectoryWatcher.java:674)
at
org.apache.felix.fileinstall.internal.DirectoryWatcher.doProcess(DirectoryWatcher.java:495)
at
org.apache.felix.fileinstall.internal.DirectoryWatcher.process(DirectoryWatcher.java:358)
at
org.apache.felix.fileinstall.internal.DirectoryWatcher.run(DirectoryWatcher.java:310)
Locked ownable synchronizers:
- None
You can see that the refresh event will never return (to tear down the
latch) as long as the FileInstall.stop operation can't get the lock in to
directory which it's currently holding during the refresh operation!
What seems strange is that fileinstall is adding itself to the list of
bundles to refresh during the
findBundlesWithOptionalPackagesToRefresh(toRefresh); call. Is that expected?
Sincerely,
--
*Raymond Augé* <http://www.liferay.com/web/raymond.auge/profile>
(@rotty3000)
Senior Software Architect
*Liferay, Inc.* <http://www.liferay.com> (@Liferay)
