[2017-06-16 17:23:31,850] [HTTP-72] ERROR com.googlesource.gerrit.plugins.its.base.util.CommitMessageFetcher : Could not fetch commit message for commit 0000000000000000000000000000000000000000 of project test
org.eclipse.jgit.errors.MissingObjectException: Missing unknown 0000000000000000000000000000000000000000
at org.eclipse.jgit.internal.storage.file.WindowCursor.open(WindowCursor.java:163)
at org.eclipse.jgit.lib.ObjectReader.open(ObjectReader.java:234)
at org.eclipse.jgit.revwalk.RevWalk.parseAny(RevWalk.java:859)
at org.eclipse.jgit.revwalk.RevWalk.parseCommit(RevWalk.java:772)
at com.googlesource.gerrit.plugins.its.base.util.CommitMessageFetcher.fetch(CommitMessageFetcher.java:30)
at com.googlesource.gerrit.plugins.its.base.util.CommitMessageFetcher.fetchGuarded(CommitMessageFetcher.java:39)
at com.googlesource.gerrit.plugins.its.base.util.IssueExtractor.getIssueIds(IssueExtractor.java:100)
at com.googlesource.gerrit.plugins.its.base.util.PropertyExtractor.extractFrom(PropertyExtractor.java:123)
at com.googlesource.gerrit.plugins.its.base.util.PropertyExtractor.extractFrom(PropertyExtractor.java:206)
at com.googlesource.gerrit.plugins.its.base.workflow.ActionController.onEvent(ActionController.java:55)
at com.google.gerrit.common.EventBroker.fireEventForUnrestrictedListeners(EventBroker.java:110)
at com.google.gerrit.common.EventBroker.fireEvent(EventBroker.java:138)
at com.google.gerrit.common.EventBroker.postEvent(EventBroker.java:95)
at com.google.gerrit.server.events.StreamEventsApiListener.onGitReferenceUpdated(StreamEventsApiListener.java:382)
at com.google.gerrit.server.extensions.events.GitReferenceUpdated.fire(GitReferenceUpdated.java:149)
at com.google.gerrit.server.extensions.events.GitReferenceUpdated.fire(GitReferenceUpdated.java:123)
at com.google.gerrit.server.update.ReviewDbBatchUpdate.lambda$execute$2(ReviewDbBatchUpdate.java:299)
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
at java.util.Collections$2.tryAdvance(Collections.java:4717)
at java.util.Collections$2.forEachRemaining(Collections.java:4725)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
at com.google.gerrit.server.update.ReviewDbBatchUpdate.execute(ReviewDbBatchUpdate.java:298)
at com.google.gerrit.server.update.ReviewDbBatchUpdate.execute(ReviewDbBatchUpdate.java:364)
at com.google.gerrit.server.update.BatchUpdate.execute(BatchUpdate.java:296)
at com.google.gerrit.server.edit.ChangeEditUtil.publish(ChangeEditUtil.java:227)
at com.google.gerrit.server.change.PublishChangeEdit$Publish.applyImpl(PublishChangeEdit.java:104)
at com.google.gerrit.server.change.PublishChangeEdit$Publish.applyImpl(PublishChangeEdit.java:73)
at com.google.gerrit.server.update.RetryingRestModifyView.lambda$apply$0(RetryingRestModifyView.java:30)
at com.google.gerrit.server.update.RetryHelper.lambda$execute$0(RetryHelper.java:86)
at com.github.rholder.retry.AttemptTimeLimiters$NoAttemptTimeLimit.call(AttemptTimeLimiters.java:78)
at com.github.rholder.retry.Retryer.call(Retryer.java:160)
at com.google.gerrit.server.update.RetryHelper.execute(RetryHelper.java:86)
at com.google.gerrit.server.update.RetryingRestModifyView.apply(RetryingRestModifyView.java:30)
at com.google.gerrit.httpd.restapi.RestApiServlet.service(RestApiServlet.java:388)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at com.google.inject.servlet.ServletDefinition.doServiceImpl(ServletDefinition.java:286)
at com.google.inject.servlet.ServletDefinition.doService(ServletDefinition.java:276)
at com.google.inject.servlet.ServletDefinition.service(ServletDefinition.java:181)
at com.google.inject.servlet.ManagedServletPipeline.service(ManagedServletPipeline.java:91)
at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:85)
at com.google.gerrit.httpd.raw.StaticModule$PolyGerritFilter.doFilter(StaticModule.java:451)
at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82)
at com.google.gerrit.httpd.GetUserFilter.doFilter(GetUserFilter.java:75)
at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82)
at com.google.gerrit.httpd.RunAsFilter.doFilter(RunAsFilter.java:126)
at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82)
at com.google.gwtexpui.server.CacheControlFilter.doFilter(CacheControlFilter.java:70)
at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82)
at com.google.gerrit.httpd.RequestMetricsFilter.doFilter(RequestMetricsFilter.java:57)
at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82)
at com.google.gerrit.httpd.AllRequestFilter$FilterProxy$1.doFilter(AllRequestFilter.java:133)
at com.google.gerrit.httpd.AllRequestFilter$FilterProxy.doFilter(AllRequestFilter.java:135)
at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82)
at com.google.gerrit.httpd.RequestContextFilter.doFilter(RequestContextFilter.java:72)
at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82)
at com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:120)
at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:135)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1759)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:582)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:224)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1180)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:512)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
at org.eclipse.jetty.server.Server.handle(Server.java:534)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:320)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:283)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:108)
at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)
at java.lang.Thread.run(Thread.java:748)
in its-base.
I am currently running gerrit 2.14 (master).