[jira] [Created] (TEZ-3330) Error on avro M/R job with Tez: missing configuration property

["Manuel Godbert (JIRA)" <ji...@apache.org>]

Manuel Godbert created TEZ-3330:
-----------------------------------

             Summary: Error on avro M/R job with Tez: missing configuration property
                 Key: TEZ-3330
                 URL: https://issues.apache.org/jira/browse/TEZ-3330
             Project: Apache Tez
          Issue Type: Bug
            Reporter: Manuel Godbert


I tried running the simple avro M/R job MapredColorCount, that I found in the examples of avro release 1.7.7.
It failed with the following trace:
{code}
errorMessage=Shuffle Runner Failed:org.apache.tez.runtime.library.common.shuffle.orderedgrouped.Shuffle$ShuffleError: Error while doing final merge
        at org.apache.tez.runtime.library.common.shuffle.orderedgrouped.Shuffle$RunShuffleCallable.callInternal(Shuffle.java:378)
        at org.apache.tez.runtime.library.common.shuffle.orderedgrouped.Shuffle$RunShuffleCallable.callInternal(Shuffle.java:337)
        at org.apache.tez.common.CallableWithNdc.call(CallableWithNdc.java:36)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.NullPointerException
        at java.io.StringReader.<init>(StringReader.java:50)
        at org.apache.avro.Schema$Parser.parse(Schema.java:917)
        at org.apache.avro.Schema.parse(Schema.java:966)
        at org.apache.avro.mapred.AvroJob.getMapOutputSchema(AvroJob.java:78)
        at org.apache.avro.mapred.AvroKeyComparator.setConf(AvroKeyComparator.java:39)
        at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:76)
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:136)
        at org.apache.tez.runtime.library.common.ConfigUtils.getIntermediateInputKeyComparator(ConfigUtils.java:133)
        at org.apache.tez.runtime.library.common.shuffle.orderedgrouped.MergeManager.finalMerge(MergeManager.java:915)
        at org.apache.tez.runtime.library.common.shuffle.orderedgrouped.MergeManager.close(MergeManager.java:540)
        at org.apache.tez.runtime.library.common.shuffle.orderedgrouped.Shuffle$RunShuffleCallable.callInternal(Shuffle.java:376)
        ... 6 more
{code}

Digging a bit I saw that during shuffle Tez can't access some of the configuration properties of the job. In our example it is the avro.output.schema that is missing.

With some more complicated code I could get one step further and a similar issue happened when the valuesIterator for the reducer was being built:
{code}
java.lang.NullPointerException
at java.io.StringReader.<init>(StringReader.java:50)
at org.apache.avro.Schema$Parser.parse(Schema.java:917)
at org.apache.avro.Schema.parse(Schema.java:966)
at org.apache.avro.mapred.AvroJob.getMapOutputSchema(AvroJob.java:78)
at org.apache.avro.mapred.AvroSerialization.getDeserializer(AvroSerialization.java:53)
at org.apache.hadoop.io.serializer.SerializationFactory.getDeserializer(SerializationFactory.java:90)
at org.apache.tez.runtime.library.common.ValuesIterator.<init>(ValuesIterator.java:80)
at org.apache.tez.runtime.library.input.OrderedGroupedKVInput.createValuesIterator(OrderedGroupedKVInput.java:287)
{code}

I am using HDP2.4, Tez 0.7.0, avro 1.7.4



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)