[jbosstools-builds] Build failed in Jenkins: jbosstools-docs-nightly #909

[ci-builds at redhat.com]

See <http://jenkins.mw.lab.eng.bos.redhat.com/hudson/job/jbosstools-docs-nightly/909/>

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Started by user mmurray at REDHAT.COM
[EnvInject] - Loading node environment variables.
Building remotely on rhts-stacks1
Updating https://svn.jboss.org/repos/devstudio/trunk/hudson-jobs/settings
At revision 10962
no change for https://svn.jboss.org/repos/devstudio/trunk/hudson-jobs/settings since the previous build
Checkout:jbosstools-docs-nightly / <http://jenkins.mw.lab.eng.bos.redhat.com/hudson/job/jbosstools-docs-nightly/ws/> - hudson.remoting.Channel at 36d8a785:rhts-stacks1
Using strategy: Default
Last Built Revision: Revision 979f8cf778aa94777b5323a51ce6895d7ef6e88e (origin/master)
Fetching changes from 1 remote Git repository
Fetching upstream changes from git://github.com/jbosstools/jbosstools-documentation.git
Seen branch in repository origin/HEAD
Seen branch in repository origin/jbosstools-2.0.x
Seen branch in repository origin/jbosstools-2.1.x
Seen branch in repository origin/jbosstools-3.0.x
Seen branch in repository origin/jbosstools-3.1.x
Seen branch in repository origin/jbosstools-3.2.x
Seen branch in repository origin/jbosstools-3.3.x
Seen branch in repository origin/jbosstools-4.0.0.Beta1
Seen branch in repository origin/jbosstools-4.0.0.Beta2x
Seen branch in repository origin/jbosstools-4.0.x
Seen branch in repository origin/master
FATAL: Error computing merge base
hudson.plugins.git.GitException: Error computing merge base
	at hudson.plugins.git.util.GitUtils.filterTipBranches(GitUtils.java:161)
	at hudson.plugins.git.util.DefaultBuildChooser.getAdvancedCandidateRevisions(DefaultBuildChooser.java:191)
	at hudson.plugins.git.util.DefaultBuildChooser.getCandidateRevisions(DefaultBuildChooser.java:53)
	at hudson.plugins.git.util.BuildChooser.getCandidateRevisions(BuildChooser.java:69)
	at hudson.plugins.git.GitSCM$2.invoke(GitSCM.java:1174)
	at hudson.plugins.git.GitSCM$2.invoke(GitSCM.java:1063)
	at hudson.FilePath$FileCallableWrapper.call(FilePath.java:2047)
	at hudson.remoting.UserRequest.perform(UserRequest.java:118)
	at hudson.remoting.UserRequest.perform(UserRequest.java:48)
	at hudson.remoting.Request$2.run(Request.java:287)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at hudson.remoting.Engine$1$1.run(Engine.java:60)
	at java.lang.Thread.run(Thread.java:662)
Caused by: org.eclipse.jgit.errors.MissingObjectException: Missing commit 9e35098a4fe9eb721f9adc8b25f5f764c40ef75e
	at org.eclipse.jgit.storage.file.WindowCursor.open(WindowCursor.java:126)
	at org.eclipse.jgit.revwalk.RevWalk.getCachedBytes(RevWalk.java:855)
	at org.eclipse.jgit.revwalk.RevCommit.parseHeaders(RevCommit.java:136)
	at org.eclipse.jgit.revwalk.MergeBaseGenerator.next(MergeBaseGenerator.java:148)
	at org.eclipse.jgit.revwalk.StartGenerator.next(StartGenerator.java:102)
	at org.eclipse.jgit.revwalk.RevWalk.next(RevWalk.java:420)
	at hudson.plugins.git.util.GitUtils.filterTipBranches(GitUtils.java:139)
	... 16 more