[2017-09-08 10:57:16,204] [HTTP-105] ERROR com.google.gerrit.httpd.restapi.RestApiServlet : Error in POST /changes/20/revisions/9a75e982dd6177cc46a6d70822e4b486b5793ade/submit com.google.gerrit.extensions.restapi.RestApiException: BatchRefUpdate failed: BatchRefUpdate[ UPDATE: 1ccb3bab3585a81c6db16a054790cf6c57e09687 9a75e982dd6177cc46a6d70822e4b486b5793ade refs/heads/master (REJECTED_OTHER_REASON: lock error: Failure to replicate update. GitMS - minimum number of learners not available ) ] at com.google.gerrit.server.git.BatchUpdate.executeRefUpdates(BatchUpdate.java:697) at com.google.gerrit.server.git.BatchUpdate.execute(BatchUpdate.java:404) at com.google.gerrit.server.git.MergeOp.integrateIntoHistory(MergeOp.java:470) at com.google.gerrit.server.git.MergeOp.merge(MergeOp.java:433) at com.google.gerrit.server.change.Submit.apply(Submit.java:225) at com.google.gerrit.server.change.Submit.apply(Submit.java:83) at com.google.gerrit.httpd.restapi.RestApiServlet.service(RestApiServlet.java:341) 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.GetUserFilter.doFilter(GetUserFilter.java:82) at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82) at com.google.gwtexpui.server.CacheControlFilter.doFilter(CacheControlFilter.java:73) at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82) at com.google.gerrit.httpd.RunAsFilter.doFilter(RunAsFilter.java:122) at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82) at com.google.gerrit.httpd.RequestMetricsFilter.doFilter(RequestMetricsFilter.java:60) at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82) at com.google.gerrit.httpd.AllRequestFilter$FilterProxy$1.doFilter(AllRequestFilter.java:136) at com.google.gerrit.httpd.AllRequestFilter$FilterProxy.doFilter(AllRequestFilter.java:105) at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82) at com.google.gerrit.httpd.RequestContextFilter.doFilter(RequestContextFilter.java:75) 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:1652) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:221) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97) at org.eclipse.jetty.server.handler.RequestLogHandler.handle(RequestLogHandler.java:95) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97) at org.eclipse.jetty.server.Server.handle(Server.java:499) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257) at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555) at java.lang.Thread.run(Thread.java:745)