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https://issues.apache.org/jira/browse/SPARK-14958?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kay Ousterhout resolved SPARK-14958.
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Resolution: Fixed
Fix Version/s: 2.2.0
> Failed task hangs if error is encountered when getting task result
> ------------------------------------------------------------------
>
> Key: SPARK-14958
> URL: https://issues.apache.org/jira/browse/SPARK-14958
> Project: Spark
> Issue Type: Bug
> Affects Versions: 1.6.0, 2.0.0, 2.1.0
> Reporter: Rui Li
> Assignee: Rui Li
> Fix For: 2.2.0
>
>
> In {{TaskResultGetter}}, if we get an error when deserialize
> {{TaskEndReason}}, TaskScheduler won't have a chance to handle the failed
> task and the task just hangs.
> {code}
> def enqueueFailedTask(taskSetManager: TaskSetManager, tid: Long, taskState:
> TaskState,
> serializedData: ByteBuffer) {
> var reason : TaskEndReason = UnknownReason
> try {
> getTaskResultExecutor.execute(new Runnable {
> override def run(): Unit = Utils.logUncaughtExceptions {
> val loader = Utils.getContextOrSparkClassLoader
> try {
> if (serializedData != null && serializedData.limit() > 0) {
> reason = serializer.get().deserialize[TaskEndReason](
> serializedData, loader)
> }
> } catch {
> case cnd: ClassNotFoundException =>
> // Log an error but keep going here -- the task failed, so not
> catastrophic
> // if we can't deserialize the reason.
> logError(
> "Could not deserialize TaskEndReason: ClassNotFound with
> classloader " + loader)
> case ex: Exception => {}
> }
> scheduler.handleFailedTask(taskSetManager, tid, taskState, reason)
> }
> })
> } catch {
> case e: RejectedExecutionException if sparkEnv.isStopped =>
> // ignore it
> }
> }
> {code}
> In my specific case, I got a NoClassDefFoundError and the failed task hangs
> forever.
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