I debugged a bit the process repeating the job on a sub-slice of the entire data (using the id value to filter data with parquet push down filters) and all slices completed successfully :( So I tried to increase the parallelism (from 1 slot per TM to 4) to see if this was somehow a factor of stress but it didn't cause any error. Then I almost doubled the number of rows to process and finally the error showed up again. It seems somehow related to spilling to disk but I can't really understand what's going on :( This is a summary of my debug attempts:
4 Task managers with 6 GB and 1 slot each, parallelism = 4 id < 10.000.000.000 => 1.857.365 rows => OK id >= 10.000.000.000 && id < 10.010.000.000 => 20.057.714 rows => OK id >= 10.010.000.000 && id < 99.945.000.000 => 20.926.903 rows => OK id >= 99.945.000.000 && id < 99.960.000.000 => 23.888.750 rows => OK id >= 99.960.000.000 => 32.936.422 rows => OK 4 TM with 8 GB and 4 slot each, parallelism 16 id >= 99.960.000.000 => 32.936.422 rows => OK id >= 99.945.000.000 => 56.825.172 rows => ERROR Any help is appreciated.. Best, Flavio On Wed, Apr 19, 2017 at 8:34 PM, Flavio Pompermaier <pomperma...@okkam.it> wrote: > I could but only if there's a good probability that it fix the > problem...how confident are you about it? > > On Wed, Apr 19, 2017 at 8:27 PM, Ted Yu <yuzhih...@gmail.com> wrote: > >> Looking at git log of DataInputDeserializer.java , there has been some >> recent change. >> >> If you have time, maybe try with 1.2.1 RC and see if the error is >> reproducible ? >> >> Cheers >> >> On Wed, Apr 19, 2017 at 11:22 AM, Flavio Pompermaier < >> pomperma...@okkam.it> wrote: >> >>> Hi to all, >>> I think I'm again on the weird Exception with the >>> SpillingAdaptiveSpanningRecordDeserializer... >>> I'm using Flink 1.2.0 and the error seems to rise when Flink spills to >>> disk but the Exception thrown is not very helpful. Any idea? >>> >>> Caused by: java.lang.RuntimeException: Error obtaining the sorted input: >>> Thread 'SortMerger Reading Thread' terminated due to an exception: null >>> at org.apache.flink.runtime.operators.sort.UnilateralSortMerger >>> .getIterator(UnilateralSortMerger.java:619) >>> at org.apache.flink.runtime.operators.BatchTask.getInput(BatchT >>> ask.java:1094) >>> at org.apache.flink.runtime.operators.GroupReduceDriver.prepare >>> (GroupReduceDriver.java:99) >>> at org.apache.flink.runtime.operators.BatchTask.run(BatchTask.java:460) >>> ... 3 more >>> Caused by: java.io.IOException: Thread 'SortMerger Reading Thread' >>> terminated due to an exception: null >>> at org.apache.flink.runtime.operators.sort.UnilateralSortMerger >>> $ThreadBase.run(UnilateralSortMerger.java:799) >>> Caused by: java.io.EOFException >>> at org.apache.flink.runtime.util.DataInputDeserializer.readUnsi >>> gnedByte(DataInputDeserializer.java:306) >>> at org.apache.flink.types.StringValue.readString(StringValue.java:747) >>> at org.apache.flink.api.common.typeutils.base.StringSerializer. >>> deserialize(StringSerializer.java:69) >>> at org.apache.flink.api.common.typeutils.base.StringSerializer. >>> deserialize(StringSerializer.java:74) >>> at org.apache.flink.api.common.typeutils.base.StringSerializer. >>> deserialize(StringSerializer.java:28) >>> at org.apache.flink.api.java.typeutils.runtime.RowSerializer.de >>> serialize(RowSerializer.java:193) >>> at org.apache.flink.api.java.typeutils.runtime.RowSerializer.de >>> serialize(RowSerializer.java:36) >>> at org.apache.flink.runtime.plugable.ReusingDeserializationDele >>> gate.read(ReusingDeserializationDelegate.java:57) >>> at org.apache.flink.runtime.io.network.api.serialization.Spilli >>> ngAdaptiveSpanningRecordDeserializer.getNextRecord(SpillingA >>> daptiveSpanningRecordDeserializer.java:144) >>> at org.apache.flink.runtime.io.network.api.reader.AbstractRecor >>> dReader.getNextRecord(AbstractRecordReader.java:72) >>> at org.apache.flink.runtime.io.network.api.reader.MutableRecord >>> Reader.next(MutableRecordReader.java:42) >>> at org.apache.flink.runtime.operators.util.ReaderIterator.next( >>> ReaderIterator.java:59) >>> at org.apache.flink.runtime.operators.sort.UnilateralSortMerger >>> $ReadingThread.go(UnilateralSortMerger.java:1035) >>> at org.apache.flink.runtime.operators.sort.UnilateralSortMerger >>> $ThreadBase.run(UnilateralSortMerger.java:796) >>> >>> >>> Best, >>> Flavio >>> >> >> > >
