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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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