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https://issues.apache.org/jira/browse/NUTCH-1253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13222404#comment-13222404
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Ferdy Galema commented on NUTCH-1253:
-------------------------------------
It indeed seems broken for trunk. When running it with default options in local
mode, every parse simply fails. This is pretty suprising. With the help of
Dennis' instructions it indeed becomes more clear what the error is about. Note
that nutchgora is not affected. Though at first sight they seem to be using the
same library versions.
I'm amazed that this error has not been noticed earlier. I cannot speak for
users/devs that are on 1.x, so I kindly ask if one of them is able to pick this
issue up. (Or least provide some insight). My guess is that they either use
tagsoup (instead of neko) or parse-tika for html parsing. Then again if that's
the case I don't know why the defaults are now the way they are. Because of
this I have not yet tested any of your patches, sorry Lewis.
> Incompatible neko and xerces versions
> -------------------------------------
>
> Key: NUTCH-1253
> URL: https://issues.apache.org/jira/browse/NUTCH-1253
> Project: Nutch
> Issue Type: Bug
> Affects Versions: 1.4
> Environment: Ubuntu 10.04
> Reporter: Dennis Spathis
> Attachments: NUTCH-1253-nutchgora.patch, NUTCH-1253.patch
>
>
> The Nutch 1.4 distribution includes
> - nekohtml-0.9.5.jar (under .../runtime/local/plugins/lib-
> nekohtml)
> - xercesImpl-2.9.1.jar (under .../runtime/local/lib)
> These two JARs appear to be incompatible versions. When the HtmlParser
> (configured to use neko) is invoked during a local-mode crawl, the parse
> fails due to an AbstractMethodError. (Note: To see the AbstractMethodError,
> rebuild the HtmlParser plugin and add a
> catch(Throwable) clause in the getParse method to log the stacktrace.)
> I found that substituting a later, compatible version of nekohtml (1.9.11)
> fixes the problem.
> Curiously, and in support of the above, the nekohtml plugin.xml file in
> Nutch 1.4 contains the following:
> <plugin
> id="lib-nekohtml"
> name="CyberNeko HTML Parser"
> version="1.9.11"
> provider-name="org.cyberneko">
> <runtime>
> <library name="nekohtml-0.9.5.jar">
> <export name="*"/>
> </library>
> </runtime>
> </plugin>
> Note the conflicting version numbers (version tag is "1.9.11" but the
> specified library is "nekohtml-0.9.5.jar").
> Was the 0.9.5 version included by mistake? Was the intention rather to
> include 1.9.11?
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