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https://issues.apache.org/jira/browse/NUTCH-1723?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13893718#comment-13893718
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Lewis John McGibbney edited comment on NUTCH-1723 at 2/6/14 7:52 PM:
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hi [~ksmets], this is a good catch but a pretty nasty one to deal with.
We are currently working on a GORA_94 branch which is an Avro upgrade 1.3.3 -->
1.7.X and new persistency API... I am trying to focus my time on more pressing
issues such as this one so I'm personally not going to try and get a fix right
now.
If this issue is still present when we release Gora 0.3 then I'll look in to
this in detail.
Thanks for logging this bug... it is a PITA indeed!
Are you able to resume crawls or does the job task fail entirely?
was (Author: lewismc):
hi [~ksmets], this is a good catch but a pretty nasty one to deal with.
We are currently working on a GORA_94 branch which is an Avro upgrade 1.3.3 -->
1.7.X and new persistency API... I am trying to focus my time on more pressing
issues such as this one so I'm personally not going to try and get a fix right
now.
If this issue is still present when we release Gora 0.3 then I'll look in to
this in detail.
Thanks for logging this bug... it is a PITA indeed!
> nutch updatedb fails due to avro (de)serialization issues on images
> -------------------------------------------------------------------
>
> Key: NUTCH-1723
> URL: https://issues.apache.org/jira/browse/NUTCH-1723
> Project: Nutch
> Issue Type: Bug
> Components: crawldb, parser
> Affects Versions: 2.3, 2.2.1
> Environment: - Ubuntu 12.04.3 LTS (GNU/Linux 3.2.0-36-generic x86_64)
> - DataStax Community Edition Apache Cassandra 2.0.4
> Reporter: Koen Smets
> Labels: avro, cassandra, gora, gora-cassandra, nutch, tika
> Fix For: 2.3
>
>
> Running `bin/crawl` for 2 iterations using either the nutch-2.2.1 release or
> the latest 2.x checkout on a seed file containing for example
> http://www.mountsinai.on.ca and http://www.dhzb.de (or any other webpage with
> image files with no obvious file extensions) causes to throw either
> java.lang.IllegalArgument, IOException and/or OutOfBoundsExceptions in the
> the readFields function of WebPageWritable:
> @Override
> public void readFields(DataInput in) throws IOException {
> webPage = IOUtils.deserialize(getConf(), in, webPage, WebPage.class);
> }
> @Override
> public void write(DataOutput out) throws IOException {
> IOUtils.serialize(getConf(), out, webPage, WebPage.class);
> }
> 2014-02-04 13:50:15,421 INFO util.WebPageWritable - Try reading fields: ...
> 2014-02-04 13:50:15,423 ERROR util.WebPageWritable - Error - Failed to read
> fields: http://www.mountsinai.on.ca/carousel/patient-care-banner/image
> 2014-02-04 13:50:15,423 ERROR util.WebPageWritable - Error - Reading fields
> of the WebPage class failed - java.lang.IllegalArgumentException
> 2014-02-04 13:50:15,425 ERROR util.WebPageWritable - Error - Printing
> stacktrace - java.lang.IllegalArgumentException
> Or,
> java.lang.IndexOutOfBoundsException
> at java.nio.Buffer.checkBounds(Buffer.java:559)
> at java.nio.HeapByteBuffer.get(HeapByteBuffer.java:143)
> at
> org.apache.avro.ipc.ByteBufferInputStream.read(ByteBufferInputStream.java:52)
> at
> org.apache.avro.io.DirectBinaryDecoder.doReadBytes(DirectBinaryDecoder.java:183)
> at org.apache.avro.io.BinaryDecoder.readString(BinaryDecoder.java:265)
> at
> org.apache.gora.mapreduce.FakeResolvingDecoder.readString(FakeResolvingDecoder.java:131)
> at
> org.apache.avro.generic.GenericDatumReader.readString(GenericDatumReader.java:280)
> at
> org.apache.avro.generic.GenericDatumReader.readMap(GenericDatumReader.java:191)
> at
> org.apache.gora.avro.PersistentDatumReader.readMap(PersistentDatumReader.java:183)
> at
> org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:83)
> at
> org.apache.gora.avro.PersistentDatumReader.readRecord(PersistentDatumReader.java:139)
> at
> org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:80)
> at
> org.apache.gora.avro.PersistentDatumReader.read(PersistentDatumReader.java:103)
> at
> org.apache.gora.avro.PersistentDatumReader.read(PersistentDatumReader.java:98)
> at
> org.apache.gora.mapreduce.PersistentDeserializer.deserialize(PersistentDeserializer.java:73)
> at
> org.apache.gora.mapreduce.PersistentDeserializer.deserialize(PersistentDeserializer.java:36)
> at org.apache.gora.util.IOUtils.deserialize(IOUtils.java:205)
> at
> org.apache.nutch.util.WebPageWritable.readFields(WebPageWritable.java:45)
> at
> org.apache.nutch.util.GenericWritableConfigurable.readFields(GenericWritableConfigurable.java:54)
> at
> org.apache.hadoop.io.serializer.WritableSerialization$WritableDeserializer.deserialize(WritableSerialization.java:67)
> at
> org.apache.hadoop.io.serializer.WritableSerialization$WritableDeserializer.deserialize(WritableSerialization.java:40)
> at
> org.apache.hadoop.mapreduce.ReduceContext.nextKeyValue(ReduceContext.java:117)
> at
> org.apache.hadoop.mapreduce.ReduceContext.nextKey(ReduceContext.java:92)
> at org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:176)
> at
> org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:649)
> at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:418)
> at
> org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:398)
> The exceptions are caused by image files that sneak through the urlfilter (no
> extension indicating an image file) and that get (properly?) parsed by tika
> library.
> Note that silently catching the thrown exceptions causes corruption of the
> Cassandra database, as the deserializer reads over multiple webpage entries
> in the DataInput. Resulting in a loss of several pages of other host present
> in the seed file.
> Moreover, if one makes sure that the image pages don't end up in the
> DataInput written by DBUpdateMapper, e.g. by configuring nutch-site.xml to
> disable the tika parser, the nutch dbupdate finishes properly.
> <property>
> <name>plugin.excludes</name>
> <value>parse-tika</value>
> </property>
> I highly suspect that the issues are due to gora's dependency on the outdated
> avro-1.3.3 library.
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