[JENKINS] Lucene-Solr-trunk-Linux (64bit/jdk1.8.0_20) - Build # 11067 - Failure!

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

Build: http://jenkins.thetaphi.de/job/Lucene-Solr-trunk-Linux/11067/
Java: 64bit/jdk1.8.0_20 -XX:-UseCompressedOops -XX:+UseConcMarkSweepGC

All tests passed

Build Log:
[...truncated 46567 lines...]
-documentation-lint:
     [echo] checking for broken html...
    [jtidy] Checking for broken html (such as invalid tags)...
   [delete] Deleting directory /mnt/ssd/jenkins/workspace/Lucene-Solr-trunk-Linux/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 "/mnt/ssd/jenkins/workspace/Lucene-Solr-trunk-Linux/dev-tools/scripts/checkJavaDocs.py", line 371, in <module>
     [exec]     if checkPackageSummaries(sys.argv[1], level):
     [exec]   File "/mnt/ssd/jenkins/workspace/Lucene-Solr-trunk-Linux/dev-tools/scripts/checkJavaDocs.py", line 351, in checkPackageSummaries
     [exec]     if checkClassSummaries(fullPath):
     [exec]   File "/mnt/ssd/jenkins/workspace/Lucene-Solr-trunk-Linux/dev-tools/scripts/checkJavaDocs.py", line 215, in checkClassSummaries
     [exec]     missing.append((lastCaption, unEscapeURL(lastItem)))
     [exec]   File "/mnt/ssd/jenkins/workspace/Lucene-Solr-trunk-Linux/dev-tools/scripts/checkJavaDocs.py", line 303, in unEscapeURL
     [exec]     s = s.replace('%20', ' ')
     [exec] AttributeError: 'NoneType' object has no attribute 'replace'

BUILD FAILED
/mnt/ssd/jenkins/workspace/Lucene-Solr-trunk-Linux/build.xml:474: The following error occurred while executing this line:
/mnt/ssd/jenkins/workspace/Lucene-Solr-trunk-Linux/build.xml:63: The following error occurred while executing this line:
/mnt/ssd/jenkins/workspace/Lucene-Solr-trunk-Linux/lucene/build.xml:212: The following error occurred while executing this line:
/mnt/ssd/jenkins/workspace/Lucene-Solr-trunk-Linux/lucene/build.xml:242: The following error occurred while executing this line:
/mnt/ssd/jenkins/workspace/Lucene-Solr-trunk-Linux/lucene/common-build.xml:2425: exec returned: 1

Total time: 103 minutes 4 seconds
Build step 'Invoke Ant' marked build as failure
[description-setter] Description set: Java: 64bit/jdk1.8.0_20 -XX:-UseCompressedOops -XX:+UseConcMarkSweepGC
Archiving artifacts
Recording test results
Email was triggered for: Failure - Any
Sending email for trigger: Failure - Any