【WebSocket】SpringBoot中，WebSocket客户端连接服务端时，出现SockJsException: Uncaught failure in SockJS...异常信息

错误信息：

2019-01-18 10:58:32.094 ERROR 11113 --- [nio-8086-exec-9] o.a.c.c.C.[.[.[.[dispatcherServlet]      : Servlet.service() for servlet [dispatcherServlet] in context with path [/energymanagement] threw exception [Request processing failed; nested exception is org.springframework.web.socket.sockjs.SockJsException: Uncaught failure in SockJS request, uri=http://192.168.168.180:8086/xxxxx/socket/690/a4o3vo4b/xhr?t=1547780328164; nested exception is org.springframework.web.socket.sockjs.SockJsTransportFailureException: Failed to open session; nested exception is java.lang.IllegalArgumentException: Async support must be enabled on a servlet and for all filters involved in async request processing. This is done in Java code using the Servlet API or by adding "true" to servlet and filter declarations in web.xml. Also you must use a Servlet 3.0+ container] with root cause

java.lang.IllegalArgumentException: Async support must be enabled on a servlet and for all filters involved in async request processing. This is done in Java code using the Servlet API or by adding "true" to servlet and filter declarations in web.xml. Also you must use a Servlet 3.0+ container

....//省略其他异常信息

at com.xxxxxx.energymanagement.CrossFilter.doFilter(CrossFilter.java:37) ~[classes!/:0.0.1-SNAPSHOT]

.....//省略其他异常信息

错误中，只有这一句是关于项目中文件，而且是一个Fileter。

 

错误原因：

具体原因不清楚，可以参考https://www.cnblogs.com/guangshan/p/4916993.html该博主的分享

 

错误解决：

在项目中的所有Filter中的@WebFilter中增加异步支持asyncSupported=true

EG：@WebFilter(filterName = "CrossFilter", urlPatterns = "/*",asyncSupported=true)

同时在项目的启动类增加@EnableAsync注解。经测试，此方法可以解决该异常。