[15-1-30 16:32:17:797 CST] 00000003 ThreadMonitor W WSVR0605W: 線程“WebContainer : 26”（0000029f）已保持活動狀態 685090 毫秒，此線程可能已掛起。在服務器中共有 25 個線程可能處於掛起狀態。
at sun.misc.Unsafe.park(Native Method)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:184)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:822)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:853)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1189)
at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:197)
at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:273)
at org.apache.activemq.transport.MutexTransport.oneway(MutexTransport.java:66)
at org.apache.activemq.transport.ResponseCorrelator.oneway(ResponseCorrelator.java:60)
at org.apache.activemq.ActiveMQConnection.doAsyncSendPacket(ActiveMQConnection.java:1275)
at org.apache.activemq.ActiveMQConnection.asyncSendPacket(ActiveMQConnection.java:1269)
at org.apache.activemq.ActiveMQSession.(ActiveMQSession.java:252)
at org.apache.activemq.ActiveMQConnection.createSession(ActiveMQConnection.java:317)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:60)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
at java.lang.reflect.Method.invoke(Method.java:611)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:502)
at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:179)
at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3935)
at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:276)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:931)
at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1583)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:186)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:452)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:511)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:305)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:276)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)
從日誌看，線程掛起在獲取數據源連接的地方。問題可能是由於集羣環境下獲取數據源出現死鎖，從而導致資源無法釋放，最終線程池被耗盡，線程掛起。 最後只能重啓WAS服務。
這個問題的解決辦法是：在數據源裏面增加一個參數 useRRASetEquals 設置爲 true
添加路徑：
資源 -> JDBC -> XXX數據源->定製屬性 -> 新建
增加參數： useRRASetEquals ，值爲 true , 類型爲 java.lang.Boolean
這個參數應該是WAS7新加的，因爲加這個參數有版本要求，必須是 7.0.0.13 之後的版本，否則會報錯。