[JENKINS] Lucene-Solr-trunk-Windows (64bit/jdk1.8.0_20) - Build # 4260 - Failure!

[Policeman Jenkins Server <je...@thetaphi.de>]

Build: http://jenkins.thetaphi.de/job/Lucene-Solr-trunk-Windows/4260/
Java: 64bit/jdk1.8.0_20 -XX:-UseCompressedOops -XX:+UseG1GC

All tests passed

Build Log:
[...truncated 56460 lines...]
-documentation-lint:
     [echo] checking for broken html...
[ivy:cachepath] downloading http://repo1.maven.org/maven2/net/sf/jtidy/jtidy/r938/jtidy-r938.jar ...
[ivy:cachepath] ............ (244kB)
[ivy:cachepath] .. (0kB)
[ivy:cachepath] 	[SUCCESSFUL ] net.sf.jtidy#jtidy;r938!jtidy.jar (307ms)
    [jtidy] Checking for broken html (such as invalid tags)...
   [delete] Deleting directory C:\Users\JenkinsSlave\workspace\Lucene-Solr-trunk-Windows\lucene\build\jtidy_tmp
     [echo] Checking for broken links...
     [exec] 
     [exec] Crawl/parse...
     [exec] 
     [exec] Verify...
     [echo] Checking for missing docs...
     [exec] Traceback (most recent call last):
     [exec]   File "C:\Users\JenkinsSlave\workspace\Lucene-Solr-trunk-Windows\dev-tools/scripts/checkJavaDocs.py", line 371, in <module>
     [exec]     if checkPackageSummaries(sys.argv[1], level):
     [exec]   File "C:\Users\JenkinsSlave\workspace\Lucene-Solr-trunk-Windows\dev-tools/scripts/checkJavaDocs.py", line 351, in checkPackageSummaries
     [exec]     if checkClassSummaries(fullPath):
     [exec]   File "C:\Users\JenkinsSlave\workspace\Lucene-Solr-trunk-Windows\dev-tools/scripts/checkJavaDocs.py", line 215, in checkClassSummaries
     [exec]     missing.append((lastCaption, unEscapeURL(lastItem)))
     [exec]   File "C:\Users\JenkinsSlave\workspace\Lucene-Solr-trunk-Windows\dev-tools/scripts/checkJavaDocs.py", line 303, in unEscapeURL
     [exec]     s = s.replace('%20', ' ')
     [exec] AttributeError: 'NoneType' object has no attribute 'replace'

BUILD FAILED
C:\Users\JenkinsSlave\workspace\Lucene-Solr-trunk-Windows\build.xml:474: The following error occurred while executing this line:
C:\Users\JenkinsSlave\workspace\Lucene-Solr-trunk-Windows\build.xml:63: The following error occurred while executing this line:
C:\Users\JenkinsSlave\workspace\Lucene-Solr-trunk-Windows\lucene\build.xml:212: The following error occurred while executing this line:
C:\Users\JenkinsSlave\workspace\Lucene-Solr-trunk-Windows\lucene\build.xml:242: The following error occurred while executing this line:
C:\Users\JenkinsSlave\workspace\Lucene-Solr-trunk-Windows\lucene\common-build.xml:2425: exec returned: 1

Total time: 196 minutes 41 seconds
Build step 'Invoke Ant' marked build as failure
[description-setter] Description set: Java: 64bit/jdk1.8.0_20 -XX:-UseCompressedOops -XX:+UseG1GC
Archiving artifacts
Recording test results
Email was triggered for: Failure - Any
Sending email for trigger: Failure - Any