Jetty超时过期，checkIdleTimeout方法抛出的

Question

各位：求助~

我在用jetty+cometd做comet服务，continuation机制已经加入，但是日志中出现了这样的异常

 java.util.concurrent.TimeoutException: Idle timeout expired: 40002/40000 ms
        at org.eclipse.jetty.io.IdleTimeout.checkIdleTimeout(IdleTimeout.java:153)
        at org.eclipse.jetty.io.IdleTimeout$1.run(IdleTimeout.java:50)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)
201

堆栈完整，我已无解，求各位帮忙。jetty版本：jetty-9.1.0.v20131115