客戶端錯誤：
com.alibaba.dubbo.rpc.RpcException: Invoke remote method timeout. method: searchUser, provider:
...
cause: Waiting server-side response timeout by scan timer. start time: 2015-06-17 14:46:49.979, end time: 2015-06-17 14:46:51.002, client elapsed: 44 ms, server elapsed: 959 ms, timeout: 1000 ms, request: Request
...
服務端警告：
2015-06-17 14:46:52,454 WARN [DubboServerHandler-172.25.6.248:20882-thread-2] (ChannelEventRunnable.java:84) - [DUBBO] ChannelEventRunnable handle RECEIVED operation error
com.alibaba.dubbo.remoting.RemotingException: Failed to send message Response [id=0, version=2.0.0, status=20, event=false, error=null, result=RpcResult [result=com.ceair.cesso.dto.SearchUserResult@7ba2a1d2, exception=null]] to /172.25.3.91:50849, cause:
null
at com.alibaba.dubbo.remoting.transport.netty.NettyChannel.send(NettyChannel.java:108)
at com.alibaba.dubbo.remoting.transport.AbstractPeer.send(AbstractPeer.java:51)
at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:171)
at com.alibaba.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:52)
at com.alibaba.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:82)
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:662)
Caused by: java.nio.channels.ClosedChannelException
at org.jboss.netty.channel.socket.nio.NioWorker.cleanUpWriteBuffer(NioWorker.java:643)
at org.jboss.netty.channel.socket.nio.NioWorker.writeFromUserCode(NioWorker.java:370)
at org.jboss.netty.channel.socket.nio.NioServerSocketPipelineSink.handleAcceptedSocket(NioServerSocketPipelineSink.java:137)
at org.jboss.netty.channel.socket.nio.NioServerSocketPipelineSink.eventSunk(NioServerSocketPipelineSink.java:76)
at org.jboss.netty.channel.Channels.write(Channels.java:632)
at org.jboss.netty.handler.codec.oneone.OneToOneEncoder.handleDownstream(OneToOneEncoder.java:70)
at com.alibaba.dubbo.remoting.transport.netty.NettyHandler.writeRequested(NettyHandler.java:99)
at org.jboss.netty.channel.Channels.write(Channels.java:611)
at org.jboss.netty.channel.Channels.write(Channels.java:578)
at org.jboss.netty.channel.AbstractChannel.write(AbstractChannel.java:251)
at com.alibaba.dubbo.remoting.transport.netty.NettyChannel.send(NettyChannel.java:98)
... 7 more
原因分析
客戶端日誌可以看到是超時錯誤。
接着給出信息：客戶端、服務端花費的時間；
在看服務端，是通道被關閉，無法發送信息。
整體看起來，就是超時了，客戶端沒有得到返回信息，服務端不能發送信息。
是超時的配置
檢查客戶端、服務端的超時配置；發現客戶端的超時時間沒有設置，設置爲一個較長時間，就可以了。