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Posted to dev@sling.apache.org by "Chetan Mehrotra (JIRA)" <ji...@apache.org> on 2015/07/01 06:47:04 UTC
[jira] [Created] (SLING-4847) NullPointerException in MapEntries
handleEvent
Chetan Mehrotra created SLING-4847:
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Summary: NullPointerException in MapEntries handleEvent
Key: SLING-4847
URL: https://issues.apache.org/jira/browse/SLING-4847
Project: Sling
Issue Type: Bug
Components: ResourceResolver
Affects Versions: Resource Resolver 1.1.14
Reporter: Chetan Mehrotra
Priority: Minor
On a running system at times following exceptions are seen
{noformat}
30.06.2015 09:00:34.108 *WARN* [pool-5-thread-115] org.apache.felix.eventadmin Service [Map Entries Observation,1094] EventAdmin: Exception during event dispatch [org.osgi.service.event.Event [topic=org/apache/sling/api/resource/Resource/ADDED] | [org.osgi.service.event.EventHandler] | Bundle(org.apache.sling.resourceresolver [211])] (java.lang.NullPointerException)
java.lang.NullPointerException: null
at org.apache.sling.resourceresolver.impl.mapping.MapEntries.doNodeAdded(MapEntries.java:300)
at org.apache.sling.resourceresolver.impl.mapping.MapEntries.handleEvent(MapEntries.java:769)
at org.apache.felix.eventadmin.impl.handler.EventHandlerProxy.sendEvent(EventHandlerProxy.java:412)
at org.apache.felix.eventadmin.impl.tasks.SyncDeliverTasks.execute(SyncDeliverTasks.java:118)
at org.apache.felix.eventadmin.impl.handler.EventAdminImpl.sendEvent(EventAdminImpl.java:114)
at org.apache.felix.eventadmin.impl.security.EventAdminSecurityDecorator.sendEvent(EventAdminSecurityDecorator.java:96)
at org.apache.sling.jcr.resource.internal.OakResourceListener.sendOsgiEvent(OakResourceListener.java:243)
at org.apache.sling.jcr.resource.internal.OakResourceListener.added(OakResourceListener.java:109)
at org.apache.jackrabbit.oak.plugins.observation.NodeObserver$NodeEventHandler.leave(NodeObserver.java:209)
at org.apache.jackrabbit.oak.plugins.observation.FilteredHandler.leave(FilteredHandler.java:51)
at org.apache.jackrabbit.oak.plugins.observation.EventGenerator$Continuation.run(EventGenerator.java:182)
at org.apache.jackrabbit.oak.plugins.observation.EventGenerator.generate(EventGenerator.java:124)
at org.apache.jackrabbit.oak.plugins.observation.NodeObserver.contentChanged(NodeObserver.java:163)
at org.apache.jackrabbit.oak.spi.commit.BackgroundObserver$1$1.call(BackgroundObserver.java:124)
at org.apache.jackrabbit.oak.spi.commit.BackgroundObserver$1$1.call(BackgroundObserver.java:118)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
{noformat}
Looking at [code|https://github.com/apache/sling/blob/a3f25af5da1edb9f2719f04b560370c5cb6464c3/bundles/resourceresolver/src/main/java/org/apache/sling/resourceresolver/impl/mapping/MapEntries.java#L299] the resource might be null by the time event is processed. So code should guard against that
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