[ 
https://issues.apache.org/jira/browse/OAK-1204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13827545#comment-13827545
 ] 

Chetan Mehrotra edited comment on OAK-1204 at 11/28/13 5:55 AM:
----------------------------------------------------------------

*Exception - E4* Occurs frequently. Being tracked with OAK-1233

{noformat}
2013-11-20 15:08:53,546 INFO  NA [MongoNodeStore background thread] 
o.a.j.o.p.m.MongoNodeStore - Split operation on 1:/oak:index. Size before: 
102794, after: 73686 
2013-11-20 15:08:57,646 ERROR NA [pool-10-thread-4] 
o.a.s.c.s.impl.QuartzScheduler - Exception during job execution of 
org.apache.jackrabbit.oak.plugins.index.AsyncIndexUpdate@5f4519b9 : 
com.google.common.util.concurrent.UncheckedExecutionException: 
java.lang.IllegalStateException: First element of next iterator must be greater 
than previous iterator 
com.google.common.util.concurrent.UncheckedExecutionException: 
com.google.common.util.concurrent.UncheckedExecutionException: 
java.lang.IllegalStateException: First element of next iterator must be greater 
than previous iterator
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2199) 
~[na:na]
        at com.google.common.cache.LocalCache.get(LocalCache.java:3932) ~[na:na]
        at 
com.google.common.cache.LocalCache$LocalManualCache.get(LocalCache.java:4721) 
~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.MongoMK.diff(MongoMK.java:162) 
~[na:na]
        at 
org.apache.jackrabbit.oak.kernel.KernelNodeState.compareAgainstBaseState(KernelNodeState.java:480)
 ~[na:na]
        at 
org.apache.jackrabbit.oak.spi.commit.EditorDiff.process(EditorDiff.java:52) 
~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.index.AsyncIndexUpdate.run(AsyncIndexUpdate.java:103)
 ~[na:na]
        at 
org.apache.sling.commons.scheduler.impl.QuartzJobExecutor.execute(QuartzJobExecutor.java:105)
 ~[org.apache.sling.commons.scheduler:2.4.2]
        at org.quartz.core.JobRunShell.run(JobRunShell.java:207) 
[org.apache.sling.commons.scheduler:2.4.2]
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
[na:1.7.0_40]
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
[na:1.7.0_40]
        at java.lang.Thread.run(Thread.java:724) [na:1.7.0_40]
Caused by: com.google.common.util.concurrent.UncheckedExecutionException: 
java.lang.IllegalStateException: First element of next iterator must be greater 
than previous iterator
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2199) 
~[na:na]
        at com.google.common.cache.LocalCache.get(LocalCache.java:3932) ~[na:na]
        at 
com.google.common.cache.LocalCache$LocalManualCache.get(LocalCache.java:4721) 
~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.MongoNodeStore.getNode(MongoNodeStore.java:484)
 ~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.MongoMK.diffFewChildren(MongoMK.java:308)
 ~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.MongoMK.diffImpl(MongoMK.java:224) 
~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.MongoMK$1.call(MongoMK.java:165) 
~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.MongoMK$1.call(MongoMK.java:162) 
~[na:na]
        at 
com.google.common.cache.LocalCache$LocalManualCache$1.load(LocalCache.java:4724)
 ~[na:na]
        at 
com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3522)
 ~[na:na]
        at 
com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2315) 
~[na:na]
        at 
com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2278)
 ~[na:na]
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2193) 
~[na:na]
        ... 11 common frames omitted
Caused by: java.lang.IllegalStateException: First element of next iterator must 
be greater than previous iterator
        at 
org.apache.jackrabbit.oak.plugins.mongomk.util.MergeSortedIterators.fetchNextIterator(MergeSortedIterators.java:96)
 ~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.util.MergeSortedIterators.next(MergeSortedIterators.java:78)
 ~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.NodeDocument.getLatestValue(NodeDocument.java:1028)
 ~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.NodeDocument.getNodeAtRevision(NodeDocument.java:450)
 ~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.MongoNodeStore.readNode(MongoNodeStore.java:630)
 ~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.MongoNodeStore.access$000(MongoNodeStore.java:76)
 ~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.MongoNodeStore$1.call(MongoNodeStore.java:487)
 ~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.MongoNodeStore$1.call(MongoNodeStore.java:484)
 ~[na:na]
        at 
com.google.common.cache.LocalCache$LocalManualCache$1.load(LocalCache.java:4724)
 ~[na:na]
        at 
com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3522)
 ~[na:na]
        at 
com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2315) 
~[na:na]
        at 
com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2278)
 ~[na:na]
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2193) 
~[na:na]
        ... 23 common frames omitted

{noformat}


was (Author: chetanm):
*Exception - E4* Only once

{noformat}
2013-11-20 15:08:53,546 INFO  NA [MongoNodeStore background thread] 
o.a.j.o.p.m.MongoNodeStore - Split operation on 1:/oak:index. Size before: 
102794, after: 73686 
2013-11-20 15:08:57,646 ERROR NA [pool-10-thread-4] 
o.a.s.c.s.impl.QuartzScheduler - Exception during job execution of 
org.apache.jackrabbit.oak.plugins.index.AsyncIndexUpdate@5f4519b9 : 
com.google.common.util.concurrent.UncheckedExecutionException: 
java.lang.IllegalStateException: First element of next iterator must be greater 
than previous iterator 
com.google.common.util.concurrent.UncheckedExecutionException: 
com.google.common.util.concurrent.UncheckedExecutionException: 
java.lang.IllegalStateException: First element of next iterator must be greater 
than previous iterator
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2199) 
~[na:na]
        at com.google.common.cache.LocalCache.get(LocalCache.java:3932) ~[na:na]
        at 
com.google.common.cache.LocalCache$LocalManualCache.get(LocalCache.java:4721) 
~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.MongoMK.diff(MongoMK.java:162) 
~[na:na]
        at 
org.apache.jackrabbit.oak.kernel.KernelNodeState.compareAgainstBaseState(KernelNodeState.java:480)
 ~[na:na]
        at 
org.apache.jackrabbit.oak.spi.commit.EditorDiff.process(EditorDiff.java:52) 
~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.index.AsyncIndexUpdate.run(AsyncIndexUpdate.java:103)
 ~[na:na]
        at 
org.apache.sling.commons.scheduler.impl.QuartzJobExecutor.execute(QuartzJobExecutor.java:105)
 ~[org.apache.sling.commons.scheduler:2.4.2]
        at org.quartz.core.JobRunShell.run(JobRunShell.java:207) 
[org.apache.sling.commons.scheduler:2.4.2]
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
[na:1.7.0_40]
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
[na:1.7.0_40]
        at java.lang.Thread.run(Thread.java:724) [na:1.7.0_40]
Caused by: com.google.common.util.concurrent.UncheckedExecutionException: 
java.lang.IllegalStateException: First element of next iterator must be greater 
than previous iterator
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2199) 
~[na:na]
        at com.google.common.cache.LocalCache.get(LocalCache.java:3932) ~[na:na]
        at 
com.google.common.cache.LocalCache$LocalManualCache.get(LocalCache.java:4721) 
~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.MongoNodeStore.getNode(MongoNodeStore.java:484)
 ~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.MongoMK.diffFewChildren(MongoMK.java:308)
 ~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.MongoMK.diffImpl(MongoMK.java:224) 
~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.MongoMK$1.call(MongoMK.java:165) 
~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.MongoMK$1.call(MongoMK.java:162) 
~[na:na]
        at 
com.google.common.cache.LocalCache$LocalManualCache$1.load(LocalCache.java:4724)
 ~[na:na]
        at 
com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3522)
 ~[na:na]
        at 
com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2315) 
~[na:na]
        at 
com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2278)
 ~[na:na]
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2193) 
~[na:na]
        ... 11 common frames omitted
Caused by: java.lang.IllegalStateException: First element of next iterator must 
be greater than previous iterator
        at 
org.apache.jackrabbit.oak.plugins.mongomk.util.MergeSortedIterators.fetchNextIterator(MergeSortedIterators.java:96)
 ~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.util.MergeSortedIterators.next(MergeSortedIterators.java:78)
 ~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.NodeDocument.getLatestValue(NodeDocument.java:1028)
 ~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.NodeDocument.getNodeAtRevision(NodeDocument.java:450)
 ~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.MongoNodeStore.readNode(MongoNodeStore.java:630)
 ~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.MongoNodeStore.access$000(MongoNodeStore.java:76)
 ~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.MongoNodeStore$1.call(MongoNodeStore.java:487)
 ~[na:na]
        at 
org.apache.jackrabbit.oak.plugins.mongomk.MongoNodeStore$1.call(MongoNodeStore.java:484)
 ~[na:na]
        at 
com.google.common.cache.LocalCache$LocalManualCache$1.load(LocalCache.java:4724)
 ~[na:na]
        at 
com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3522)
 ~[na:na]
        at 
com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2315) 
~[na:na]
        at 
com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2278)
 ~[na:na]
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2193) 
~[na:na]
        ... 23 common frames omitted

{noformat}

> Analyze behaviour while running Oak cluster on Mongo
> ----------------------------------------------------
>
>                 Key: OAK-1204
>                 URL: https://issues.apache.org/jira/browse/OAK-1204
>             Project: Jackrabbit Oak
>          Issue Type: Task
>          Components: mongomk
>            Reporter: Chetan Mehrotra
>            Assignee: Chetan Mehrotra
>         Attachments: mongo-mk-cluster.tar.gz
>
>
> To checkout the cluster support we should run two Sling based systems running 
> on Oak in a cluster using Mongo. Post that analyse if any exception is 
> reported and identify issues related to those



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