[jira] Updated: (HADOOP-2419) HADOOP-1965 breaks nutch

["Paul Saab (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-2419?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Paul Saab updated HADOOP-2419:
------------------------------

    Attachment: MapRunnableTest.java

This is a sample MR job that mimics what nutch's Fetcher2 does with threads and queuing url's to be fetched.  It takes 2 arguments on the command line, an input path and an output path.  All it does it reads a TextInputFormat, queues it up for threads to then write it back out as it came in.  The sample run I just did came back with the following exception.  Reverting HADOOP-1965 allows the job to finish without error.

java.lang.ArrayIndexOutOfBoundsException
	at java.lang.System.arraycopy(Native Method)
	at org.apache.hadoop.mapred.MergeSorter.sort(MergeSorter.java:45)
	at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpillToDisk(MapTask.java:446)
	at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:690)
	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:193)
	at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2016)

java.lang.ArrayIndexOutOfBoundsException: 6
	at org.apache.hadoop.mapred.BasicTypeSorterBase.compare(BasicTypeSorterBase.java:133)
	at org.apache.hadoop.mapred.MergeSorter.compare(MergeSorter.java:59)
	at org.apache.hadoop.mapred.MergeSorter.compare(MergeSorter.java:35)
	at org.apache.hadoop.util.MergeSort.mergeSort(MergeSort.java:46)
	at org.apache.hadoop.util.MergeSort.mergeSort(MergeSort.java:56)
	at org.apache.hadoop.mapred.MergeSorter.sort(MergeSorter.java:46)
	at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpillToDisk(MapTask.java:446)
	at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:690)
	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:193)
	at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2016)


> HADOOP-1965 breaks nutch
> ------------------------
>
>                 Key: HADOOP-2419
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2419
>             Project: Hadoop
>          Issue Type: Bug
>            Reporter: Paul Saab
>         Attachments: MapRunnableTest.java
>
>
> When running nutch on trunk, nutch is unable to complete a fetch and the following exceptions are raised:
> java.io.EOFException
>         at java.io.DataInputStream.readFully(DataInputStream.java:180)
>         at org.apache.nutch.protocol.Content.readFields(Content.java:158)
>         at org.apache.nutch.util.GenericWritableConfigurable.readFields(GenericWritableConfigurable.java:38)
>         at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.spill(MapTask.java:536)
>         at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpillToDisk(MapTask.java:474)
>         at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.access$100(MapTask.java:248)
>         at org.apache.hadoop.mapred.MapTask$MapOutputBuffer$1.run(MapTask.java:413)
> Exception in thread "SortSpillThread" java.lang.NegativeArraySizeException
>      at org.apache.hadoop.io.Text.readString(Text.java:388)
>      at org.apache.nutch.metadata.Metadata.readFields(Metadata.java:243)
>      at org.apache.nutch.protocol.Content.readFields(Content.java:151)
>      at org.apache.nutch.util.GenericWritableConfigurable.readFields(GenericWritableConfigurable.java:38)
>      at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.spill(MapTask.java:536)
>      at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpillToDisk(MapTask.java:474)
>      at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.access$100(MapTask.java:248)
>      at org.apache.hadoop.mapred.MapTask$MapOutputBuffer$1.run(MapTask.java:413)
> After reverting HADOOP-1965 nutch works just fine.

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