[NUTCH-433] java.io.EOFException in newer nightlies in mergesegs or indexing from hadoop.io.DataOutputBuffer

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.9.0
• Fix Version/s: 0.9.0
• Component/s: generator, indexer

Environment

Both Linux/i686 and Mac OS X PPC/Intel, but platform independent

• Assignee: Sami Siren
• Reporter: Brian Whitman
• Created: 24/Jan/07 17:53
• Updated: 18/Apr/07 15:44
• Resolved: 24/Jan/07 19:51

Description

The nightly builds have not been working at all for the past couple of weeks. Sami Siren has narrowed it down to HADOOP-331.

To replicate: download the nightly, then:

bin/nutch inject crawl/crawldb urls/ # a single URL is in urls/urls – http://apache.org
bin/nutch generate crawl/crawldb crawl/segments
bin/nutch fetch crawl/segments/2007...
bin/nutch updatedb crawl/crawldb crawl/segments/2007...

1. generate a new segment with 5 URIs
   bin/nutch generate crawl/crawldb crawl/segments -topN 5
   bin/nutch fetch crawl/segments/2007... # new segment
   bin/nutch updatedb crawl/crawldb crawl/segments/2007... # new segment

1. merge the segments and index
   bin/nutch mergesegs crawl/merged -dir crawl/segments
   ..

We get a crash in the mergesegs. This crash, with the exact same script and start URI, configuration and plugins, does not happen on a nightly from early January.

2007-01-18 14:57:11,411 INFO segment.SegmentMerger - Merging 2 segments to crawl/merged_07_01_18_14_56_22/20070118145711
2007-01-18 14:57:11,482 INFO segment.SegmentMerger - SegmentMerger: adding crawl/segments/20070118145628
2007-01-18 14:57:11,489 INFO segment.SegmentMerger - SegmentMerger: adding crawl/segments/20070118145641
2007-01-18 14:57:11,495 INFO segment.SegmentMerger - SegmentMerger: using segment data from: content crawl_generate crawl_fetch crawl_parse parse_data parse_text
2007-01-18 14:57:11,594 INFO mapred.InputFormatBase - Total input paths to process : 12
2007-01-18 14:57:11,819 INFO mapred.JobClient - Running job: job_5ug2ip
2007-01-18 14:57:12,073 WARN mapred.LocalJobRunner - job_5ug2ip
java.io.EOFException
at java.io.DataInputStream.readFully(DataInputStream.java:178)
at org.apache.hadoop.io.DataOutputBuffer$Buffer.write(DataOutputBuffer.java:57)
at org.apache.hadoop.io.DataOutputBuffer.write(DataOutputBuffer.java:91)
at org.apache.hadoop.io.UTF8.readChars(UTF8.java:212)
at org.apache.hadoop.io.UTF8.readString(UTF8.java:204)
at org.apache.hadoop.io.ObjectWritable.readObject(ObjectWritable.java:173)
at org.apache.hadoop.io.ObjectWritable.readFields(ObjectWritable.java:61)
at org.apache.nutch.metadata.MetaWrapper.readFields(MetaWrapper.java:100)
at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.spill(MapTask.java:427)
at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpillToDisk(MapTask.java:385)
at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.access$200(MapTask.java:239)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:188)
at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:109)