org.infinispan.util.concurrent.TimeoutException: Unable to acquire lock

10:36:58,480 ERROR [org.infinispan.interceptors.InvocationContextInterceptor] (default task-29) ISPN000136: Execution error: org.infinispan.util.concurrent.TimeoutException: Unable to acquire lock after [15 seconds] on key [spuXxNa9Wehy5MaWTArHzWgO] for requestor [GlobalTransaction:<null>:8707:local]! Lock held by [GlobalTransaction:<null>:8695:local]
    at org.infinispan.util.concurrent.locks.LockManagerImpl.lock(LockManagerImpl.java:198) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.util.concurrent.locks.LockManagerImpl.acquireLock(LockManagerImpl.java:171) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.interceptors.locking.AbstractTxLockingInterceptor.lockKeyAndCheckOwnership(AbstractTxLockingInterceptor.java:169) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.interceptors.locking.PessimisticLockingInterceptor.visitGetKeyValueCommand(PessimisticLockingInterceptor.java:70) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.commands.read.GetKeyValueCommand.acceptVisitor(GetKeyValueCommand.java:40) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:98) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:112) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.commands.AbstractVisitor.visitGetKeyValueCommand(AbstractVisitor.java:74) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.commands.read.GetKeyValueCommand.acceptVisitor(GetKeyValueCommand.java:40) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:98) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.interceptors.TxInterceptor.enlistReadAndInvokeNext(TxInterceptor.java:226) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.interceptors.TxInterceptor.visitGetKeyValueCommand(TxInterceptor.java:221) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.commands.read.GetKeyValueCommand.acceptVisitor(GetKeyValueCommand.java:40) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:98) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.interceptors.CacheMgmtInterceptor.visitGetKeyValueCommand(CacheMgmtInterceptor.java:92) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.commands.read.GetKeyValueCommand.acceptVisitor(GetKeyValueCommand.java:40) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:98) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:110) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.interceptors.InvocationContextInterceptor.handleDefault(InvocationContextInterceptor.java:73) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.commands.AbstractVisitor.visitGetKeyValueCommand(AbstractVisitor.java:74) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.commands.read.GetKeyValueCommand.acceptVisitor(GetKeyValueCommand.java:40) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:98) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.interceptors.BatchingInterceptor.handleDefault(BatchingInterceptor.java:79) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.commands.AbstractVisitor.visitGetKeyValueCommand(AbstractVisitor.java:74) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.commands.read.GetKeyValueCommand.acceptVisitor(GetKeyValueCommand.java:40) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.interceptors.InterceptorChain.invoke(InterceptorChain.java:333) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.CacheImpl.get(CacheImpl.java:377) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.DecoratedCache.get(DecoratedCache.java:396) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.infinispan.AbstractDelegatingCache.get(AbstractDelegatingCache.java:271) [infinispan-core-6.0.2.Final.jar:6.0.2.Final]
    at org.jboss.as.clustering.infinispan.invoker.Locator$FindOperation.invoke(Locator.java:54)
    at org.jboss.as.clustering.infinispan.invoker.Locator$LockingFindOperation.invoke(Locator.java:71)
    at org.jboss.as.clustering.infinispan.invoker.SimpleCacheInvoker.invoke(SimpleCacheInvoker.java:34)
    at org.jboss.as.clustering.infinispan.invoker.RetryingCacheInvoker.invoke(RetryingCacheInvoker.java:87)
    at org.wildfly.clustering.web.infinispan.session.coarse.CoarseSessionFactory.findValue(CoarseSessionFactory.java:109)
    at org.wildfly.clustering.web.infinispan.session.coarse.CoarseSessionFactory.findValue(CoarseSessionFactory.java:55)
    at org.wildfly.clustering.web.infinispan.session.InfinispanSessionManager.findSession(InfinispanSessionManager.java:148)
    at org.wildfly.clustering.web.undertow.session.DistributableSessionManager.getSession(DistributableSessionManager.java:115)
    at io.undertow.servlet.spec.ServletContextImpl.getSession(ServletContextImpl.java:688) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.spec.HttpServletRequestImpl.getSession(HttpServletRequestImpl.java:364) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at org.jboss.weld.servlet.SessionHolder.requestInitialized(SessionHolder.java:47) [weld-core-impl-2.2.6.Final.jar:2014-10-03 10:05]
    at org.jboss.weld.servlet.HttpContextLifecycle.requestInitialized(HttpContextLifecycle.java:212) [weld-core-impl-2.2.6.Final.jar:2014-10-03 10:05]
    at org.jboss.weld.servlet.WeldInitialListener.requestInitialized(WeldInitialListener.java:160) [weld-core-impl-2.2.6.Final.jar:2014-10-03 10:05]
    at io.undertow.servlet.core.ApplicationListeners.requestInitialized(ApplicationListeners.java:216) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:260) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:247) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:76) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:166) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.server.Connectors.executeRootHandler(Connectors.java:197) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:759) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [rt.jar:1.8.0_25]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [rt.jar:1.8.0_25]
    at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_25]