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https://issues.apache.org/jira/browse/NUTCH-2978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17646681#comment-17646681
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Markus Jelsma commented on NUTCH-2978:
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About the slf issues,
Somewhere another slf4j jar was lurking in the job file, but i couldn't find it
for a long while. Until i saw there was a slf4j jar packaged within the
tika-parser-scientific-package! I got rid of it, then got a xerces/xml-apis
error, which i then also excluded. Now there are many other errors.
Something to look out for when upgrading Tika. But for some reason, although we
are using the same Tika version, that specific package does not appear as a
dependency of Tika in in Nutch' vanilla. That may change later.
> Move to slf4j2 and remove log4j1 and reload4j
> ---------------------------------------------
>
> Key: NUTCH-2978
> URL: https://issues.apache.org/jira/browse/NUTCH-2978
> Project: Nutch
> Issue Type: Task
> Reporter: Markus Jelsma
> Priority: Major
> Attachments: NUTCH-2978-any23.patch, NUTCH-2978.patch
>
>
> I got in trouble upgrading some dependencies and got a lot of LinkageErrors
> today, or with a Tika upgrade, disappearing logs. This patch fixes that by
> moving to slf4j2, using the corrent log4j2-slfj4-impl2 and getting rid of old
> log4j -> reload4j.
>
> This patch fixes it.
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