"pool-4-thread-37":
  waiting to lock monitor 0x00007fc070087b48 (object 0x00007fc0849efad8, a java.util.Vector),
  which is held by "RequestHandlerThread[#9]"
"RequestHandlerThread[#9]":
  waiting to lock monitor 0x00007fc0706fe448 (object 0x00007fc0894de4d8, a hudson.maven.MavenModuleSetBuild),
  which is held by "pool-4-thread-37"

"pool-4-thread-37":
        at hudson.maven.AbstractMavenProject.updateTransientActions(AbstractMavenProject.java:64)
        - waiting to lock <0x00007fc0849efad8> (a java.util.Vector)
        at hudson.maven.MavenModuleSet.updateTransientActions(MavenModuleSet.java:185)
        at hudson.maven.MavenModuleSetBuild.notifyModuleBuild(MavenModuleSetBuild.java:355)
        - locked <0x00007fc0894de4d8> (a hudson.maven.MavenModuleSetBuild)
        at hudson.maven.MavenBuild$ProxyImpl2.end(MavenBuild.java:413)
        at sun.reflect.GeneratedMethodAccessor98.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at hudson.model.Executor$1.call(Executor.java:375)
        at hudson.util.InterceptingProxy$1.invoke(InterceptingProxy.java:23)
        at $Proxy11.end(Unknown Source)
        at sun.reflect.GeneratedMethodAccessor97.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at hudson.remoting.RemoteInvocationHandler$RPCRequest.perform(RemoteInvocationHandler.java:268)
        at hudson.remoting.RemoteInvocationHandler$RPCRequest.call(RemoteInvocationHandler.java:249)
        at hudson.remoting.RemoteInvocationHandler$RPCRequest.call(RemoteInvocationHandler.java:209)
        at hudson.remoting.UserRequest.perform(UserRequest.java:103)
        at hudson.remoting.UserRequest.perform(UserRequest.java:47)
        at hudson.remoting.Request$2.run(Request.java:236)
        at java.util.concurrent.Executors$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$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:619)
"RequestHandlerThread[#9]":
        at hudson.model.Actionable.getActions(Actionable.java:60)
        - waiting to lock <0x00007fc0894de4d8> (a hudson.maven.MavenModuleSetBuild)
        at hudson.maven.MavenModuleSet.addTransientActionsFromBuild(MavenModuleSet.java:208)
        at hudson.maven.MavenModuleSet.addTransientActionsFromBuild(MavenModuleSet.java:63)
        at hudson.maven.AbstractMavenProject.updateTransientActions(AbstractMavenProject.java:72)
        - locked <0x00007fc0849efad8> (a java.util.Vector)
        at hudson.maven.MavenModuleSet.updateTransientActions(MavenModuleSet.java:185)
        at hudson.model.AbstractProject.submit(AbstractProject.java:1289)
        at hudson.maven.AbstractMavenProject.submit(AbstractMavenProject.java:136)
        at hudson.maven.MavenModuleSet.submit(MavenModuleSet.java:620)
        at hudson.model.Job.doConfigSubmit(Job.java:932)
        - locked <0x00007fc083f84280> (a hudson.maven.MavenModuleSet)
        at hudson.model.AbstractProject.doConfigSubmit(AbstractProject.java:479)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:176)
        at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:92)
        at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:53)
        at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:73)
        at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:30)
        at org.kohsuke.stapler.Stapler.invoke(Stapler.java:486)
        at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:179)
        at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:30)
        at org.kohsuke.stapler.Stapler.invoke(Stapler.java:486)
        at org.kohsuke.stapler.Stapler.invoke(Stapler.java:404)
        at org.kohsuke.stapler.Stapler.service(Stapler.java:117)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:45)
        at winstone.ServletConfiguration.execute(ServletConfiguration.java:249)
        at winstone.RequestDispatcher.forward(RequestDispatcher.java:335)
        at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:378)
        at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:94)
        at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:86)
        at winstone.FilterConfiguration.execute(FilterConfiguration.java:195)
        at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:368)
        at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:49)
        at winstone.FilterConfiguration.execute(FilterConfiguration.java:195)
        at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:368)
        at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
        at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
        at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:155)
        at winstone.FilterConfiguration.execute(FilterConfiguration.java:195)
        at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:368)
        at winstone.RequestDispatcher.forward(RequestDispatcher.java:333)
        at winstone.RequestHandlerThread.processRequest(RequestHandlerThread.java:244)
        at winstone.RequestHandlerThread.run(RequestHandlerThread.java:150)
        at java.lang.Thread.run(Thread.java:619)

Found 1 deadlock.