Looking at ExternalSorter.scala line 192, i suspect some input record has
Null key.
189 while (records.hasNext) {
190 addElementsRead()
191 kv = records.next()
192 map.changeValue((getPartition(kv._1), kv._1), update)
On Sat, Mar 12, 2016 at 12:48 PM, Prabhu Joseph <prabhujose.ga...@gmail.com>
wrote:
> Looking at ExternalSorter.scala line 192
>
> 189
> while (records.hasNext) { addElementsRead() kv = records.next()
> map.changeValue((getPartition(kv._1), kv._1), update)
> maybeSpillCollection(usingMap = true) }
>
> On Sat, Mar 12, 2016 at 12:31 PM, Saurabh Guru <saurabh.g...@gmail.com>
> wrote:
>
>> I am seeing the following exception in my Spark Cluster every few days in
>> production.
>>
>> 2016-03-12 05:30:00,541 - WARN TaskSetManager - Lost task 0.0 in stage
>> 12528.0 (TID 18792, ip-1X-1XX-1-1XX.us <http://ip-10-180-1-188.us>
>> -west-1.compute.internal
>> ): java.lang.NullPointerException
>> at
>> org.apache.spark.util.collection.ExternalSorter.insertAll(ExternalSorter.scala:192)
>> at
>> org.apache.spark.shuffle.sort.SortShuffleWriter.write(SortShuffleWriter.scala:64)
>> at
>> org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:73)
>> at
>> org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:41)
>> at org.apache.spark.scheduler.Task.run(Task.scala:89)
>> at
>> org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:213)
>> at
>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>> at
>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>> at java.lang.Thread.run(Thread.java:745)
>>
>>
>> I have debugged in local machine but haven’t been able to pin point the
>> cause of the error. Anyone knows why this might occur? Any suggestions?
>>
>>
>> Thanks,
>> Saurabh
>>
>>
>>
>>
>
