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https://issues.apache.org/jira/browse/LUCENE-7884?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16064445#comment-16064445
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Jan Høydahl commented on LUCENE-7884:
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I'm sorry, but Lucene has at least 230 uses of "Paths" and I suppose many other
disabled nio APIs as well. So App engine standard simply does not support
Lucene :-(
> StringHelper needs to catch NoClassDefFoundError
> ------------------------------------------------
>
> Key: LUCENE-7884
> URL: https://issues.apache.org/jira/browse/LUCENE-7884
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/other
> Affects Versions: 5.x, 6.x, 6.5.1
> Environment: Google App Engine: https://cloud.google.com/appengine/
> Reporter: Yan Zhao
> Priority: Minor
> Labels: easyfix, newbie, newdev, patch
> Attachments: LUCENE-7884.patch
>
>
> h3. Problem:
> As shown
> [here|https://github.com/apache/lucene-solr/blob/master/lucene/core/src/java/org/apache/lucene/util/StringHelper.java#L252-L255],
> StringHelpers currently use *Paths* to generate random and catch *Exception*
> when resources are unavailable.
> However, in some platform, calling *Paths* will result *NoClassDefFoundError*
> which is not handled by catching *Exception*.
> h3. Change:
> Change to catch **Throwable** instead.
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