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(WARN:oejs.HttpChannel:qtp607635164-14195: Commit failed java.util.concurrent.TimeoutException: Idle timeout expired: 30000/30000 ms at org.eclipse.jetty.io.IdleTimeout.checkIdleTimeout(IdleTi