[jira] [Updated] (SLING-3432) pseudo network partition causes job deserialization issue in a cluster (when reading while job is being reassigned)

["Stefan Egli (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SLING-3432?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stefan Egli updated SLING-3432:
-------------------------------
    Fix Version/s:     (was: Discovery Impl 1.1.4)
                   Discovery Impl 1.1.6

> pseudo network partition causes job deserialization issue in a cluster (when reading while job is being reassigned)
> -------------------------------------------------------------------------------------------------------------------
>
>                 Key: SLING-3432
>                 URL: https://issues.apache.org/jira/browse/SLING-3432
>             Project: Sling
>          Issue Type: Bug
>          Components: Extensions
>    Affects Versions: Discovery Impl 1.0.2
>            Reporter: Stefan Egli
>            Assignee: Stefan Egli
>             Fix For: Discovery Impl 1.1.6
>
>
> There is a race condition between two instances in a cluster (eg oak or crx): Instance 1 is writing a job with a binary property, instance 2 is reading the job (likely triggered by discovery sending it a topologychangedevent). It looks like instance 2 is reading the job just about while instance 1 is still in the process or completely writing the job, or at least the binary. Resulting in the following exception:
> 04.03.2014 06:55:39.667 *WARN* [Apache Sling Job Background Loader] org.apache.sling.event.impl.jobs.JobManagerImpl Unable to read job from /var/eventing/jobs/assigned/e4337f8f-47d2-41df-b3ab-0d40b1b2acd4/slingevent:eventadmin/2014/3/3/8/45/cq.wcm.msm.job.pageEvent_9718d7db-85b4-4930-a2ba-11a80d772970_172
> java.lang.Exception: Unable to deserialize property 'pageEvent'
>         at org.apache.sling.event.impl.support.ResourceHelper.cloneValueMap(ResourceHelper.java:213)
>         at org.apache.sling.event.impl.jobs.JobManagerImpl.readJob(JobManagerImpl.java:538)
>         at org.apache.sling.event.impl.jobs.BackgroundLoader.loadJobInTheBackground(BackgroundLoader.java:318)
>         at org.apache.sling.event.impl.jobs.BackgroundLoader.loadJobsInTheBackground(BackgroundLoader.java:294)
>         at org.apache.sling.event.impl.jobs.BackgroundLoader.run(BackgroundLoader.java:203)
>         at java.lang.Thread.run(Thread.java:662)
> Caused by: java.io.EOFException: null
>         at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2280)
>         at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2749)
>         at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:779)
>         at java.io.ObjectInputStream.<init>(ObjectInputStream.java:279)
>         at org.apache.sling.event.impl.support.ResourceHelper.cloneValueMap(ResourceHelper.java:208)
>         ... 5 common frames omitted



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