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  1. Sling
  2. SLING-3432

pseudo network partition causes job deserialization issue in a cluster (when reading while job is being reassigned)

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      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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              • Assignee:
                stefanegli Stefan Egli
                Reporter:
                stefanegli Stefan Egli
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                  Updated:
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