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    Take a look at this blog post on how to set up Grid2 https://goo.gl/rxzbE6. A user related (in the email group on the source) that using older selenium libs solves this exception.

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via Atlassian JIRA by Gurleen Anand [Atlassian], 1 year ago
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This exception has no message.
java.lang.NullPointerException: 	at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:187)	at com.cenqua.fisheye.crossrepo.ChangesetDoc.fromChangeSet(ChangesetDoc.java:143)	at com.cenqua.fisheye.csindex.ChangesetIndexer$5.apply(ChangesetIndexer.java:154)	at com.cenqua.fisheye.csindex.ChangesetIndexer$5.apply(ChangesetIndexer.java:151)	at com.cenqua.fisheye.csindex.ChangesetIndexer.writeInBatches(ChangesetIndexer.java:169)	at com.cenqua.fisheye.csindex.ChangesetIndexer.indexChangesetsAndAuthors(ChangesetIndexer.java:151)	at com.cenqua.fisheye.csindex.ChangesetIndexer.indexChangesetsAndAuthors(ChangesetIndexer.java:120)	at com.atlassian.fisheye.svn.Svn2Scanner.indexChangeSets(Svn2Scanner.java:531)	at com.atlassian.fisheye.svn.Svn2Scanner.reindexChangesets(Svn2Scanner.java:1042)	at com.cenqua.fisheye.rep.ping.CrossRepositoryRescanRequest.doCrossRepoRescanCheck(CrossRepositoryRescanRequest.java:129)	at com.cenqua.fisheye.rep.ping.CrossRepositoryRescanRequest.access$000(CrossRepositoryRescanRequest.java:30)	at com.cenqua.fisheye.rep.ping.CrossRepositoryRescanRequest$1.apply(CrossRepositoryRescanRequest.java:60)	at com.cenqua.fisheye.rep.ping.CrossRepositoryRescanRequest$1.apply(CrossRepositoryRescanRequest.java:57)	at com.cenqua.fisheye.rep.RepositoryHandle.withEngine(RepositoryHandle.java:507)	at com.cenqua.fisheye.rep.ping.CrossRepositoryRescanRequest.doRequest(CrossRepositoryRescanRequest.java:57)	at com.cenqua.fisheye.rep.ping.PingRequest.process(PingRequest.java:51)	at com.cenqua.fisheye.rep.RepositoryHandle.processPingRequests(RepositoryHandle.java:230)	at com.cenqua.fisheye.rep.RepositoryHandle.access$100(RepositoryHandle.java:61)	at com.cenqua.fisheye.rep.RepositoryHandle$2.run(RepositoryHandle.java:186)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)	at java.lang.Thread.run(Thread.java:636)