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https://issues.apache.org/jira/browse/OAK-1055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13783753#comment-13783753
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Michael Dürig commented on OAK-1055:
------------------------------------
At http://svn.apache.org/r1528371 I committed a temporary work around using
explicit synchronisation to ensure {{Hook.contentChanged()}} sees a monotone
increasing sequence of node states.
> Occasional test failure in ObservationTest.observation()
> --------------------------------------------------------
>
> Key: OAK-1055
> URL: https://issues.apache.org/jira/browse/OAK-1055
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: core
> Reporter: Michael Dürig
> Assignee: Michael Dürig
> Fix For: 0.10
>
>
> The test occasionally fails with
> {code}
> Failed tests:
> observation[1](org.apache.jackrabbit.oak.jcr.observation.ObservationTest):
> Unexpected events: [EventImpl{type=8, jcrPath='/test_node/property',
> userID='oak:unknown', identifier='/test_node', info={}, date=0,
> userData=null, external=true}, EventImpl{type=16,
> jcrPath='/test_node/n1/p1', userID='oak:unknown',
> identifier='/test_node/n1', info={}, date=0, userData=null,
> external=true}, EventImpl{type=4, jcrPath='/test_node/n1/p2',
> userID='oak:unknown', identifier='/test_node/n1', info={}, date=0,
> userData=null, external=true}, EventImpl{type=2, jcrPath='/test_node/n3',
> userID='oak:unknown', identifier='/test_node/n3', info={}, date=0,
> userData=null, external=true}, EventImpl{type=8,
> jcrPath='/test_node/n3/jcr:primaryType', userID='oak:unknown',
> identifier='/test_node/n3', info={}, date=0, userData=null,
> external=true}, EventImpl{type=8, jcrPath='/test_node/n3/p3',
> userID='oak:unknown', identifier='/test_node/n3', info={}, date=0,
> userData=null, external=true}, EventImpl{type=2, jcrPath='/test_node/{4}',
> userID='oak:unknown', identifier='/test_node/{4}', info={}, date=0,
> userData=null, external=true}, EventImpl{type=8,
> jcrPath='/test_node/{4}/jcr:primaryType', userID='oak:unknown',
> identifier='/test_node/{4}', info={}, date=0, userData=null,
> external=true}, EventImpl{type=1, jcrPath='/test_node/n2',
> userID='oak:unknown', identifier='/test_node/n2', info={}, date=0,
> userData=null, external=true}, EventImpl{type=4,
> jcrPath='/test_node/n2/jcr:primaryType', userID='oak:unknown',
> identifier='/test_node/n2', info={}, date=0, userData=null,
> external=true}, EventImpl{type=4, jcrPath='/test_node/property',
> userID='oak:unknown', identifier='/test_node', info={}, date=0,
> userData=null, external=true}, EventImpl{type=16,
> jcrPath='/test_node/n1/p1', userID='oak:unknown',
> identifier='/test_node/n1', info={}, date=0, userData=null,
> external=true}, EventImpl{type=8, jcrPath='/test_node/n1/p2',
> userID='oak:unknown', identifier='/test_node/n1', info={}, date=0,
> userData=null, external=true}, EventImpl{type=2, jcrPath='/test_node/n2',
> userID='oak:unknown', identifier='/test_node/n2', info={}, date=0,
> userData=null, external=true}, EventImpl{type=8,
> jcrPath='/test_node/n2/jcr:primaryType', userID='oak:unknown',
> identifier='/test_node/n2', info={}, date=0, userData=null,
> external=true}, EventImpl{type=1, jcrPath='/test_node/n3',
> userID='oak:unknown', identifier='/test_node/n3', info={}, date=0,
> userData=null, external=true}, EventImpl{type=4,
> jcrPath='/test_node/n3/jcr:primaryType', userID='oak:unknown',
> identifier='/test_node/n3', info={}, date=0, userData=null,
> external=true}, EventImpl{type=4, jcrPath='/test_node/n3/p3',
> userID='oak:unknown', identifier='/test_node/n3', info={}, date=0,
> userData=null, external=true}, EventImpl{type=1, jcrPath='/test_node/{4}',
> userID='oak:unknown', identifier='/test_node/{4}', info={}, date=0,
> userData=null, external=true}, EventImpl{type=4,
> jcrPath='/test_node/{4}/jcr:primaryType', userID='oak:unknown',
> identifier='/test_node/{4}', info={}, date=0, userData=null,
> external=true}]
> {code}
> As [noted before | http://markmail.org/message/lk3vrrcn5edib73d] having
> {{external=true}} and also the event types indicate that the events are being
> seen "in reverse" (i.e. reverse diffing of the node states involved).
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