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From "Tejas Patil (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (NUTCH-1692) SegmentReader broken in distributed mode
Date Sun, 26 Jan 2014 16:58:38 GMT

    [ https://issues.apache.org/jira/browse/NUTCH-1692?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13882348#comment-13882348
] 

Tejas Patil commented on NUTCH-1692:
------------------------------------

Hi [~markus17],
I am tried out the patch on a latest trunk checkout and it ran fine in local mode. In deploy
mode, I encountered this:
{noformat}
$ bin/nutch readseg -list 20140126210858/ -nocontent -nogenerate
14/01/26 22:26:16 INFO util.NativeCodeLoader: Loaded the native-hadoop library
14/01/26 22:26:16 INFO zlib.ZlibFactory: Successfully loaded & initialized native-zlib
library
14/01/26 22:26:16 INFO compress.CodecPool: Got brand-new decompressor
14/01/26 22:26:16 INFO compress.CodecPool: Got brand-new decompressor
14/01/26 22:26:16 INFO compress.CodecPool: Got brand-new decompressor
14/01/26 22:26:16 INFO compress.CodecPool: Got brand-new decompressor
14/01/26 22:26:16 INFO compress.CodecPool: Got brand-new decompressor
Exception in thread "main" java.io.IOException: can't find class: org.apache.nutch.protocol.ProtocolStatus
because org.apache.nutch.protocol.ProtocolStatus
	at org.apache.hadoop.io.AbstractMapWritable.readFields(AbstractMapWritable.java:204)
	at org.apache.hadoop.io.MapWritable.readFields(MapWritable.java:146)
	at org.apache.nutch.crawl.CrawlDatum.readFields(CrawlDatum.java:280)
	at org.apache.hadoop.io.SequenceFile$Reader.getCurrentValue(SequenceFile.java:1813)
	at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:1941)
	at org.apache.hadoop.io.MapFile$Reader.next(MapFile.java:517)
	at org.apache.nutch.segment.SegmentReader.getStats(SegmentReader.java:485)
	at org.apache.nutch.segment.SegmentReader.list(SegmentReader.java:441)
	at org.apache.nutch.segment.SegmentReader.main(SegmentReader.java:597)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:156)
{noformat}

> SegmentReader broken in distributed mode
> ----------------------------------------
>
>                 Key: NUTCH-1692
>                 URL: https://issues.apache.org/jira/browse/NUTCH-1692
>             Project: Nutch
>          Issue Type: Bug
>    Affects Versions: 1.7
>            Reporter: Markus Jelsma
>            Assignee: Markus Jelsma
>             Fix For: 1.8
>
>         Attachments: NUTCH-1692-trunk.patch
>
>
> SegmentReader -list option ignores the -no* options, causing the following exception
in distributed mode:
> {code}
> Exception in thread "main" java.lang.NullPointerException
>         at java.util.ComparableTimSort.sort(ComparableTimSort.java:146)
>         at java.util.Arrays.sort(Arrays.java:472)
>         at org.apache.hadoop.mapred.SequenceFileOutputFormat.getReaders(SequenceFileOutputFormat.java:85)
>         at org.apache.nutch.segment.SegmentReader.getStats(SegmentReader.java:463)
>         at org.apache.nutch.segment.SegmentReader.list(SegmentReader.java:441)
>         at org.apache.nutch.segment.SegmentReader.main(SegmentReader.java:587)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.lang.reflect.Method.invoke(Method.java:606)
>         at org.apache.hadoop.util.RunJar.main(RunJar.java:160)
> {code}



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