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https://issues.apache.org/jira/browse/UIMA-4988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15376207#comment-15376207
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Marshall Schor commented on UIMA-4988:
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The first error was caused by a strange configuration in my build machine. The
2nd and 3rd ones probably were due my getting impatient at the slowness of
install, cancelling it, and then restarting it after unchecking the box to
"contact all update sites during install to find required software".
That I fixed by rechecking the box, and waiting a very long time - eventually
it did find things. But the first error (class not found running JCasGen from
button on the Configuration Editor) was caused by a bad build of the
uimaj-ep-runtime plugin. This plugin has embedded Jars from the UIMA runtime
artifacts, including uimaj-tools (where the JCasGen code lives). The plugin
had the correct Jar embedded, but the Manifest Entry (created by the maven
Bundle plugin inserted a wrong version in the Bundle-classpath value. When I
looked in my local .m2 repository, there were multiple Jars in the path under
the -2.8.2-SNAPSHOT spot - some had the suffix 2.8.2-SNAPSHOT, others had the
suffix 20160504.193039-25 which looks like what Eclipse build of plugins uses
for suffexes. I don't know how those got into the .m2 repository - I'm
guessing some action I took in Eclipse caused these to get built by Eclipse.
Removing the .m2 entry and rebuilding (with maven) the affected plugin fixed
that issue.
> UIMA plugins fail to install on Eclipse NEON
> --------------------------------------------
>
> Key: UIMA-4988
> URL: https://issues.apache.org/jira/browse/UIMA-4988
> Project: UIMA
> Issue Type: Bug
> Components: Eclipse plugins
> Affects Versions: 2.8.1AS, 2.8.1SDK
> Environment: Mac OS X
> Reporter: James Zhu
> Assignee: Marshall Schor
> Labels: eclipse, features, plugin
> Fix For: 2.8.1AS, 2.8.1SDK
>
>
> The new Eclipse version "NEON" came out. I run into problem when trying to
> install the Eclipse plugins for UIMA and UIMA AS.
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