Spring Integration TcpInboundGateway Read exception resulting in SocketException:Connection reset - spring

Question

I am using spring boot as per examples for TcpInboundGateway,so different devices send data to this Gateways,things works fine but in between in logs it showing following exception:
2015-12-29 18:42:19.455 ERROR 3465 --- [ool-3-thread-47] o.s.i.i.tcp.connection.TcpNetConnection : Read exception 106.221.159.216:38170:8765:934c050d-c4b5-4466-98ab-ee87714c3d00 SocketException:Connection reset
If this exception is resetting connection then how to avoid this reset?What is the cause of this error?
My code as follows
#SpringBootApplication
#IntegrationComponentScan
public class SpringIntegrationApplication extends SpringBootServletInitializer{
public static void main(String[] args) throws IOException {
ConfigurableApplicationContext ctx = SpringApplication.run(SpringIntegrationApplication.class, args);
System.in.read();
ctx.close();
}
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(SpringIntegrationApplication.class);
}
private static Class<SpringIntegrationApplication> applicationClass = SpringIntegrationApplication.class;
#Bean
TcpNetServerConnectionFactory cf(){
TcpNetServerConnectionFactory connectionFactory=new TcpNetServerConnectionFactory(8765);
return connectionFactory;
}
#Bean
TcpInboundGateway tcpGate(){
TcpInboundGateway gateway=new TcpInboundGateway();
gateway.setConnectionFactory(cf());
gateway.setRequestChannel(requestChannel());
return gateway;
}
#Bean
public MessageChannel requestChannel(){
return new DirectChannel();
}
#MessageEndpoint
public class Echo {
#ServiceActivator(inputChannel="requestChannel")
public byte[] echo(byte[] in,#SuppressWarnings("deprecation") #Header("ip_address") String ip){
byte[] rawbytes = gosDataSerivce.byteArrayToHex(in,ip);//Process bytes and returns result
return rawbytes;
}
}
}
After setting singleUse to true now exception message is changed slightly.
2015-12-31 06:09:00.481 ERROR 16450 --- [ool-3-thread-10] o.s.i.i.tcp.connection.TcpNetConnection : Read exception 106.221.146.40:9195:8765:1b4755e8-5b0c-44b9-b4e6-b3aacc25e228 SocketException:Connection reset
Use Case:
I have several clients that established GPRS connection to TcpInboundGateWay and sends login packet,our server will reply to this login packet.If client receives server reply to login packet then it will send data packets at regular interval. Server needs to reply to these packet also if server fails to send reply to those data packets then client GPRS connection is terminated and client will try to establish connections again.Let me know if this use case can be handle with TcpInboundGateWay
Network Trace Analysis
General flow of communication between client and server is as follows:Client sends login packet from ip say 106.221.148.165 so at server connection named 106.221.148.165:63430:8765:cc105da2-dae4-494b-af9c-d1ba268f34f1 is created, that client sends subsequent packets from that ip only.So everything works fine,but after some time same client sends its login packet from another ip say 106.221.142.204.And subsequent packets from new ip.But in logs following error comes that for previous connection exception occurred.
2016-01-05 05:16:14.871 ERROR 6819 --- [pool-3-thread-5] o.s.i.i.tcp.connection.TcpNetConnection : Read exception 106.221.148.165:63430:8765:cc105da2-dae4-494b-af9c-d1ba268f34f1 SocketException:Connection reset
I have set singleUse true and I am using spring integration 4.2.1

Answer 1

This message is emitted when the client closes the socket - if your client only sends one message then closes the socket, you can set singleUse to true and it will suppress this message (as long as the socket is closed normally - between messages).
With Spring Integration version 4.2 and later, the message is not emitted on a normal close, even if singleUse is false.