[OAK-2442] NoSuchElementException thrown by NodeDocument

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.11, 1.1.6
• Component/s: core
• Assignee: Marcel Reutegger
• Reporter: Chetan Mehrotra
• Created: 23/Jan/15 11:41
• Updated: 02/Feb/15 09:16
• Resolved: 26/Jan/15 13:00

Description

Following error is seen with latest 1.0.9-SNAPSHOT builds on some system

Caused by: java.util.NoSuchElementException: null
        at java.util.TreeMap.key(TreeMap.java:1221)
        at java.util.TreeMap.firstKey(TreeMap.java:285)
        at java.util.Collections$UnmodifiableSortedMap.firstKey(Collections.java:1549)
        at com.google.common.collect.ForwardingSortedMap.firstKey(ForwardingSortedMap.java:73)
        at org.apache.jackrabbit.oak.plugins.document.NodeDocument.getNodeAtRevision(NodeDocument.java:819)
        at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore.readNode(DocumentNodeStore.java:930)

Most likely the above occurs because a TreeMap associated with some key in NodeDocument is empty.

23.01.2015 01:57:23.308 *WARN* [pool-11-thread-5]org.apache.jackrabbit.oak.plugins.observation.NodeObserver Error whiledispatching observation eventscom.google.common.util.concurrent.UncheckedExecutionException:com.google.common.util.concurrent.UncheckedExecutionException:java.util.NoSuchElementException
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2199)
        at com.google.common.cache.LocalCache.get(LocalCache.java:3932)
        at com.google.common.cache.LocalCache$LocalManualCache.get(LocalCache.java:4721)
        at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore.getChildren(DocumentNodeStore.java:731)
        at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore.diffImpl(DocumentNodeStore.java:1666)
        at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore.access$200(DocumentNodeStore.java:105)
        at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore$7.call(DocumentNodeStore.java:1260)
        at org.apache.jackrabbit.oak.plugins.document.MongoDiffCache.getChanges(MongoDiffCache.java:88)
        at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore.diffChildren(DocumentNodeStore.java:1255)
        at org.apache.jackrabbit.oak.plugins.document.DocumentNodeState.compareAgainstBaseState(DocumentNodeState.java:260)
        at org.apache.jackrabbit.oak.plugins.observation.EventGenerator$Continuation.run(EventGenerator.java:172)
        at org.apache.jackrabbit.oak.plugins.observation.EventGenerator.generate(EventGenerator.java:118)
        at org.apache.jackrabbit.oak.plugins.observation.NodeObserver.contentChanged(NodeObserver.java:156)
        at org.apache.jackrabbit.oak.spi.commit.BackgroundObserver$1$1.call(BackgroundObserver.java:117)
        at org.apache.jackrabbit.oak.spi.commit.BackgroundObserver$1$1.call(BackgroundObserver.java:111)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)
Caused by: com.google.common.util.concurrent.UncheckedExecutionException:java.util.NoSuchElementException
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2199)
        at com.google.common.cache.LocalCache.get(LocalCache.java:3932)
        at com.google.common.cache.LocalCache$LocalManualCache.get(LocalCache.java:4721)
        at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore.getNode(DocumentNodeStore.java:704)
        at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore.readChildren(DocumentNodeStore.java:786)
        at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore$4.call(DocumentNodeStore.java:734)
        at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore$4.call(DocumentNodeStore.java:731)
        at com.google.common.cache.LocalCache$LocalManualCache$1.load(LocalCache.java:4724)
        at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3522)
        at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2315)
        at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2278)
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2193)        ... 18 common frames omitted
Caused by: java.util.NoSuchElementException: null
        at java.util.TreeMap.key(TreeMap.java:1221)
        at java.util.TreeMap.firstKey(TreeMap.java:285)
        at java.util.Collections$UnmodifiableSortedMap.firstKey(Collections.java:1549)
        at com.google.common.collect.ForwardingSortedMap.firstKey(ForwardingSortedMap.java:73)
        at org.apache.jackrabbit.oak.plugins.document.NodeDocument.getNodeAtRevision(NodeDocument.java:819)
        at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore.readNode(DocumentNodeStore.java:930)
        at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore$3.call(DocumentNodeStore.java:707)
        at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore$3.call(DocumentNodeStore.java:704)
        at com.google.common.cache.LocalCache$LocalManualCache$1.load(LocalCache.java:4724)
        at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3522)
        at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2315)
        at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2278)
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2193)