[Geotools-devel] [jira] (GEOT-4535) Deadlock in AbstractMapPane and MapContent

[Zsolt Sandor (JIRA)]

Zsolt Sandor created GEOT-4535 Deadlock in AbstractMapPane and MapContent Issue Type: Bug Affects Versions: 8.4 Assignee: Unassigned Components: swing Created: 16/Aug/13 7:32 AM Description: AbstractMapPane's getScreenToWorldTransform() method locks the following two locks: AbstractMapPane.paramsLock and then mapContent.monitor (mapContent.getViewport()) Mapcontent's addLayers() method locks: mapContent.monitor then fires an event change when AbstractMapPane.layerAdded() is called, which locks AbstractMapPane.paramsLock With good timing, it causes deadlock. See stack trace here: Thread: MapLayerMsgHandler 6, Group=main, Prio=6, State=WAITING sun.misc.Unsafe.park(Native Method) java.util.concurrent.locks.LockSupport.park(LockSupport.java:186) java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834) java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:867) java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1197) java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock.lock(ReentrantReadWriteLock.java:945) org.geotools.swing.AbstractMapPane.layerAdded(AbstractMapPane.java:786) AbstractMapPane.paramsLock com.siemens.pse.common.geo.modules.map.AVLSMapPane.layerAdded(AVLSMapPane.java:1105) org.geotools.map.MapContent.fireLayerAdded(MapContent.java:467) MapContent.monitor.readLock() org.geotools.map.MapContent$LayerList.addAllAbsent(MapContent.java:1042) org.geotools.map.MapContent.addLayers(MapContent.java:388) MapContent.monitor.writeLock() com.siemens.pse.common.geo.core.map.DefaultMap.addLayerWrapper(DefaultMap.java:153) com.siemens.pse.common.geo.modules.map.MapDisplayHandler.handleAddLayers(MapDisplayHandler.java:191) com.siemens.pse.common.geo.modules.map.MapDisplayHandler.handleLayerMessage(MapDisplayHandler.java:473) com.siemens.pse.common.geo.modules.map.MapDisplayHandler.access$3(MapDisplayHandler.java:409) com.siemens.pse.common.geo.modules.map.MapDisplayHandler$MapLayerMsgHandler.process(MapDisplayHandler.java:379) com.siemens.pse.common.geo.modules.map.MapDisplayHandler$MapLayerMsgHandler.process(MapDisplayHandler.java:1) com.siemens.pse.common.threading.SmartQueue.run(SmartQueue.java:287) Thread: AWT-EventQueue-0, Group=main, Prio=6, State=WAITING sun.misc.Unsafe.park(Native Method) java.util.concurrent.locks.LockSupport.park(LockSupport.java:186) java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834) java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireShared(AbstractQueuedSynchronizer.java:964) java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared(AbstractQueuedSynchronizer.java:1282) java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock(ReentrantReadWriteLock.java:731) org.geotools.map.MapContent.getViewport(MapContent.java:662) MapContent.monitor.readLock() com.siemens.pse.common.geo.modules.map.AVLSMapPane.getScreenToWorldTransform(AVLSMapPane.java:1054) AbstractMapPane.paramsLock.readLock() org.geotools.swing.event.DefaultMapMouseEventDispatcher.convertEvent(DefaultMapMouseEventDispatcher.java:222) org.geotools.swing.event.DefaultMapMouseEventDispatcher.mouseMoved(DefaultMapMouseEventDispatcher.java:192) java.awt.AWTEventMulticaster.mouseMoved(AWTEventMulticaster.java:330) Environment: Windows 7, Java 7 latest Project: GeoTools Priority: Major Reporter: Zsolt Sandor

This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira

------------------------------------------------------------------------------
Get 100% visibility into Java/.NET code with AppDynamics Lite!
It's a free troubleshooting tool designed for production.
Get down to code-level detail for bottlenecks, with <2% overhead. 
Download for free and get started troubleshooting in minutes. 
http://pubads.g.doubleclick.net/gampad/clk?id=48897031&iu=/4140/ostg.clktrk
_______________________________________________
GeoTools-Devel mailing list
GeoTools-Devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/geotools-devel