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https://issues.apache.org/jira/browse/LUCENE-1591?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12697164#action_12697164
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Michael McCandless commented on LUCENE-1591:
--------------------------------------------
So, after upgrading to xerces 2.9.1, I then hit this error:
{code}
Exception in thread "Thread-0" java.lang.RuntimeException:
org.apache.xerces.impl.io.MalformedByteSequenceException: Invalid byte 2 of
4-byte UTF-8 sequence.
at
org.apache.lucene.benchmark.byTask.feeds.EnwikiDocMaker$Parser.run(EnwikiDocMaker.java:101)
at java.lang.Thread.run(Thread.java:619)
Caused by: org.apache.xerces.impl.io.MalformedByteSequenceException: Invalid
byte 2 of 4-byte UTF-8 sequence.
at
org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown
Source)
at org.apache.xerces.util.ErrorHandlerWrapper.fatalError(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
Source)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at
org.apache.lucene.benchmark.byTask.feeds.EnwikiDocMaker$Parser.run(EnwikiDocMaker.java:77)
... 1 more
{code}
It appears I'm hitting XERCESJ-1257 which, hideously, is still
open. Worse, we are already doing the suggested workaround at the
bottom of the issue. Hmm.
> Enable bzip compression in benchmark
> ------------------------------------
>
> Key: LUCENE-1591
> URL: https://issues.apache.org/jira/browse/LUCENE-1591
> Project: Lucene - Java
> Issue Type: Improvement
> Components: contrib/benchmark
> Reporter: Shai Erera
> Fix For: 2.9
>
>
> bzip compression can aid the benchmark package by not requiring extracting
> bzip files (such as enwiki) in order to index them. The plan is to add a
> config parameter bzip.compression=true/false and in the relevant tasks either
> decompress the input file or compress the output file using the bzip streams.
> It will add a dependency on ant.jar which contains two classes similar to
> GZIPOutputStream and GZIPInputStream which compress/decompress files using
> the bzip algorithm.
> bzip is known to be superior in its compression performance to the gzip
> algorithm (~20% better compression), although it does the
> compression/decompression a bit slower.
> I wil post a patch which adds this parameter and implement it in
> LineDocMaker, EnwikiDocMaker and WriteLineDoc task. Maybe even add the
> capability to DocMaker or some of the super classes, so it can be inherited
> by all sub-classes.
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