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https://issues.apache.org/jira/browse/LUCENE-6732?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15045737#comment-15045737
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Uwe Schindler commented on LUCENE-6732:
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This is a standard Java Exception. There is no problem with it. Ant or Java
would report similar. You cannot really improve this. The operating system does
not give more information. This is basic ant semantics of using FileScanner and
opening files.
The only thing you can do is to log the filename with debug prio, so you can
try with ant -verbose. Should I do this?
> Improve validate-source-patterns in build.xml (e.g., detect invalid license
> headers!!)
> --------------------------------------------------------------------------------------
>
> Key: LUCENE-6732
> URL: https://issues.apache.org/jira/browse/LUCENE-6732
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Uwe Schindler
> Assignee: Uwe Schindler
> Fix For: Trunk, 5.4
>
> Attachments: LUCENE-6732-v2.patch, LUCENE-6732.patch,
> LUCENE-6732.patch
>
>
> Today I enabled warnings analysis on Policeman Jenkins. This scans the build
> log for warnings by javac and reports them in statistics, together with
> source file dumps.
> When doing that I found out that someone added again a lot of "invalid"
> license headers using {{/\*\*}} instead a simple comment. This causes
> javadocs warnings under some circumstances, because {{/\*\*}} is start of
> javadocs and not a license comment.
> I then tried to fix the validate-source-patterns to detect this, but due to a
> bug in ANT, the {{<containsregexp/>}} filter is applied per line (although it
> has multiline matching capabilities!!!).
> So I rewrote our checker to run with groovy. This also has some good parts:
> - it tells you wwhat was broken, otherwise you just know there is an error,
> but not whats wrong (tab, nocommit,...)
> - its much faster (multiple {{<containsregexp/>}} read file over and over,
> this one reads file one time into a string and then applies all regular
> expressions).
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