ConnectionLostException using Spring Boot with Tomcat Websocket - spring

Question

I have a Java Stomp Websocket Client application using Spring Boot 1.3.0-BUILD-SNAPSHOT. Here is my pom.xml
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.0.BUILD-SNAPSHOT</version>
<relativePath />
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
</dependencies>
My StompSessionHandlerAdapter subscribes to a timer topic which receives a message every second which works fine. On another topic, I receive messages every few minutes. When a message arrives on that topic I receive the following exception in the StompSessionHandlerAdapter handleTransportError method
org.springframework.messaging.simp.stomp.ConnectionLostException: Connection closed
at org.springframework.messaging.simp.stomp.DefaultStompSession.afterConnectionClosed(DefaultStompSession.java:458)
at org.springframework.web.socket.messaging.WebSocketStompClient$WebSocketTcpConnectionHandlerAdapter.afterConnectionClosed(WebSocketStompClient.java:356)
at org.springframework.web.socket.sockjs.client.AbstractClientSockJsSession.afterTransportClosed(AbstractClientSockJsSession.java:321)
at org.springframework.web.socket.sockjs.client.WebSocketTransport$ClientSockJsWebSocketHandler.afterConnectionClosed(WebSocketTransport.java:172)
at org.springframework.web.socket.adapter.standard.StandardWebSocketHandlerAdapter.onClose(StandardWebSocketHandlerAdapter.java:143)
at org.apache.tomcat.websocket.WsSession.fireEndpointOnClose(WsSession.java:527)
at org.apache.tomcat.websocket.WsSession.doClose(WsSession.java:479)
at org.apache.tomcat.websocket.WsSession.close(WsSession.java:445)
at org.apache.tomcat.websocket.WsFrameClient.close(WsFrameClient.java:94)
at org.apache.tomcat.websocket.WsFrameClient.access$100(WsFrameClient.java:31)
at org.apache.tomcat.websocket.WsFrameClient$WsFrameClientCompletionHandler.completed(WsFrameClient.java:134)
at org.apache.tomcat.websocket.WsFrameClient$WsFrameClientCompletionHandler.completed(WsFrameClient.java:108)
at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
at sun.nio.ch.Invoker$2.run(Invoker.java:218)
at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Here is the code
public class SocketSessionHandler extends StompSessionHandlerAdapter {
private StompSession stompSession;
#Override
public void afterConnected(StompSession stompSession, StompHeaders connectedHeaders) {
this.stompSession = stompSession;
stompSession.setAutoReceipt(true);
stompSession.subscribe("/topic/timer", new StompFrameHandler() {
#Override
public Type getPayloadType(StompHeaders headers) {
return String.class;
}
#Override
public void handleFrame(StompHeaders headers, Object payload) {
System.out.println((payload.toString());
}
});
stompSession.subscribe("/topic/scores", new StompFrameHandler() {
#Override
public Type getPayloadType(StompHeaders headers) {
return ScoresPublish.class;
}
#Override
public void handleFrame(StompHeaders headers, Object payload) {
ScoresPublish pub = (ScoresPublish)payload;
System.out.println(pub.getScore());
}
});
}
#Override
public void handleException(StompSession session, StompCommand command, StompHeaders headers,
byte[] payload, Throwable exception) {
exception.printStackTrace();
}
#Override
public void handleTransportError(StompSession session, Throwable exception) {
exception.printStackTrace();
}
}
If I define my own Websocket dependencies in the pom.xml I don't have the problem. By doing this I also don't get embedded Tomcat started
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-messaging</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-websocket</artifactId>
</dependency>
<dependency>
<groupId>javax.websocket</groupId>
<artifactId>javax.websocket-api</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>javax.websocket</groupId>
<artifactId>javax.websocket-client-api</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>org.glassfish.tyrus.bundles</groupId>
<artifactId>tyrus-standalone-client</artifactId>
<version>1.10</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>

Answer 1

I think my issue may have been due to my pom.xml missing the spring-messaging dependency. The following dependencies allow my websocket application to work in Spring Boot Release 1.3.1
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-messaging</artifactId>
</dependency>