Apache S4
  1. Apache S4
  2. S4-87

Checkpointing: recovery : avoid rejections upon fetching

    Details

    • Type: Bug Bug
    • Status: Resolved
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: 0.5.0
    • Fix Version/s: 0.5.0
    • Labels:
      None

      Description

      Tests pass fine on macosx with jdk 1.6.0_33 but fail on ubuntu with the same jdk version (oracle).

      Here is the stacktrace: (I added some logging to see the error)

      java.util.concurrent.RejectedExecutionException: null
      	at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:1768) ~[na:1.6.0_33]
      	at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:767) ~[na:1.6.0_33]
      	at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:658) ~[na:1.6.0_33]
      	at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:92) ~[na:1.6.0_33]
      	at org.apache.s4.core.ft.SafeKeeper.fetchSerializedState(SafeKeeper.java:239) ~[main/:na]
      	at org.apache.s4.core.ProcessingElement.recover(ProcessingElement.java:759) [main/:na]
      	at org.apache.s4.core.ProcessingElement.handleInputEvent(ProcessingElement.java:411) [main/:na]
      	at org.apache.s4.core.Stream.run(Stream.java:299) [main/:na]
      	at java.lang.Thread.run(Thread.java:662) [na:1.6.0_33]
       [words seen stream] ERROR org.apache.s4.core.ProcessingElement - Cannot fetch serialized stated for [org.apache.s4.wordcount.WordCounterPE/doobie
      

      This could be due to the fact that we use a handoff queue, though it is not clear to me.

      Anyway, since there may be parallel recovery request from different prototypes, it may be more adequate to use a bounded queue, with the possibility to use multiple threads for the fetch operations.

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          People

          • Assignee:
            Matthieu Morel
            Reporter:
            Matthieu Morel
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            Dates

            • Created:
              Updated:
              Resolved:

              Development