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This article introduces the relevant knowledge of "how to solve server exception problems". In the operation of actual cases, many people will encounter such a dilemma. Next, let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Service background:

Stream data receiving-> parsing filtering-- > invoking the socket service to write to the mina service.

Server exception log:

Java.io.IOException: Too many open files Failed to open a selectorFailed to create a new instance of org.apache.mina.transport.socket.nio.NioProcessor:null

Navigate to the problem code:

Public void init () {NioSocketConnector connector = new NioSocketConnector (); connector.getFilterChain (). AddLast ("codec", new ProtocolCodecFilter (new TextLineCodecFactory (Charset.defaultCharset (); connector.setConnectTimeoutMillis (10000); connector.setHandler (new SocketClientHandler ()); connector.getSessionConfig (). SetReceiveBufferSize (10240); / / set the size of the receive buffer connector.getSessionConfig (). SetSendBufferSize (10240) / / set the size of the output buffer ConnectFuture cf = connector.connect (new InetSocketAddress (socketConfig.getSocketServerIp (), socketConfig.getSocketServerPort (); / / wait for the connection to be created, cf.awaitUninterruptibly (); session = cf.getSession ();}

The cause of the problem:

When the mina server can not connect for a long time and there are a lot of concurrent connections, it will cause the above problems.

Solution: release the handle when the connection is unsuccessful.

After modification:

Public void init () {NioSocketConnector connector = new NioSocketConnector (); connector.getFilterChain (). AddLast ("codec", new ProtocolCodecFilter (new TextLineCodecFactory (Charset.defaultCharset (); connector.setConnectTimeoutMillis (10000); connector.setHandler (new SocketClientHandler ()); connector.getSessionConfig (). SetReceiveBufferSize (10240); / / set the size of the receive buffer connector.getSessionConfig (). SetSendBufferSize (10240) / / set the size of the output buffer ConnectFuture cf = connector.connect (new InetSocketAddress (socketConfig.getSocketServerIp (), socketConfig.getSocketServerPort (); / / wait for the connection creation to complete cf.awaitUninterruptibly () If (cf.isDone ()) {if (! cf.isConnected ()) {log.error ("fail connect {} {}", socketConfig.getSocketServerIp (), socketConfig.getSocketServerPort ()); connector.dispose (); throw new RuntimeException ("Not connect to Mina Server");} else {session = cf.getSession ();}

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