前端使用的vue连接后端webSocket

后端一直报这个错误 java.io.EOFException

java.io.EOFException
	at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.fillReadBuffer(NioEndpoint.java:1231)
	at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.read(NioEndpoint.java:1141)
	at org.apache.tomcat.websocket.server.WsFrameServer.onDataAvailable(WsFrameServer.java:75)
	at org.apache.tomcat.websocket.server.WsFrameServer.doOnDataAvailable(WsFrameServer.java:183)
	at org.apache.tomcat.websocket.server.WsFrameServer.notifyDataAvailable(WsFrameServer.java:162)
	at org.apache.tomcat.websocket.server.WsHttpUpgradeHandler.upgradeDispatch(WsHttpUpgradeHandler.java:156)
	at org.apache.coyote.http11.upgrade.UpgradeProcessorInternal.dispatch(UpgradeProcessorInternal.java:60)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:59)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:888)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1597)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)

一直以为是前端设置的接口超时时间导致的，然后经过修改前端接口超时时间也没有明显效果

1.然后想到了曲线救国的方式

就是前端每次失败时候调用close方法的时候再重新调用一次连接方法，哈哈哈哈哈，然后就会出现下面的这种情况

admin加入webSocket！当前人数为1
15:10:32.687 [QuartzScheduler_RuoyiScheduler-iZ8vb3puchpd0at9ah4fjfZ1635729154459_ClusterManager] WARN  c.a.d.p.DruidAbstractDataSource - [testConnectionInternal,1489] - discard long time none received connection. , jdbcUrl : jdbc:mysql://localhost:3306/uw?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=true&serverTimezone=GMT%2B8, version : 1.2.4, lastPacketReceivedIdleMillis : 204783
发生错误
java.io.EOFException
	at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.fillReadBuffer(NioEndpoint.java:1231)
	at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.read(NioEndpoint.java:1141)
	at org.apache.tomcat.websocket.server.WsFrameServer.onDataAvailable(WsFrameServer.java:75)
	at org.apache.tomcat.websocket.server.WsFrameServer.doOnDataAvailable(WsFrameServer.java:183)
	at org.apache.tomcat.websocket.server.WsFrameServer.notifyDataAvailable(WsFrameServer.java:162)
	at org.apache.tomcat.websocket.server.WsHttpUpgradeHandler.upgradeDispatch(WsHttpUpgradeHandler.java:156)
	at org.apache.coyote.http11.upgrade.UpgradeProcessorInternal.dispatch(UpgradeProcessorInternal.java:60)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:59)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:888)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1597)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)
admin断开webSocket连接！当前人数为0
15:11:18.752 [http-nio-8081-exec-28] DEBUG c.r.s.m.S.selectRolesByUserName - [debug,137] - ==>  Preparing: select distinct r.role_id, r.role_name, r.role_key, r.role_sort, r.data_scope, r.menu_check_strictly, r.dept_check_strictly, r.status, r.del_flag, r.create_time, r.remark from sys_role r left join sys_user_role ur on ur.role_id = r.role_id left join sys_user u on u.user_id = ur.user_id left join sys_dept d on u.dept_id = d.dept_id WHERE r.del_flag = '0' and u.user_name = ?
15:11:18.753 [http-nio-8081-exec-28] DEBUG c.r.s.m.S.selectRolesByUserName - [debug,137] - ==> Parameters: admin(String)
15:11:18.812 [http-nio-8081-exec-28] DEBUG c.r.s.m.S.selectRolesByUserName - [debug,137] - <==      Total: 1
15:11:18.813 [http-nio-8081-exec-28] DEBUG c.r.s.m.S.selectPostsByUserName - [debug,137] - ==>  Preparing: select p.post_id, p.post_name, p.post_code from sys_post p left join sys_user_post up on up.post_id = p.post_id left join sys_user u on u.user_id = up.user_id where u.user_name = ?
15:11:18.814 [http-nio-8081-exec-28] DEBUG c.r.s.m.S.selectPostsByUserName - [debug,137] - ==> Parameters: admin(String)
15:11:18.822 [http-nio-8081-exec-28] DEBUG c.r.s.m.S.selectPostsByUserName - [debug,137] - <==      Total: 1
admin加入webSocket！当前人数为1
15:12:06.444 [QuartzScheduler_RuoyiScheduler-iZ8vb3puchpd0at9ah4fjfZ1635729154459_ClusterManager] WARN  c.a.d.p.DruidAbstractDataSource - [testConnectionInternal,1489] - discard long time none received connection. , jdbcUrl : jdbc:mysql://localhost:3306/uw?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=true&serverTimezone=GMT%2B8, version : 1.2.4, lastPacketReceivedIdleMillis : 93002
15:12:14.201 [QuartzScheduler_RuoyiScheduler-iZ8vb3puchpd0at9ah4fjfZ1635729154459_MisfireHandler] ERROR c.a.d.f.s.StatFilter - [internalAfterStatementExecute,487] - slow sql 12790 millis. SELECT COUNT(TRIGGER_NAME) FROM QRTZ_TRIGGERS WHERE SCHED_NAME = 'RuoyiScheduler' AND NOT (MISFIRE_INSTR = -1) AND NEXT_FIRE_TIME < ? AND TRIGGER_STATE = ?[1635750709411,"WAITING"]
发生错误
java.io.EOFException
	at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.fillReadBuffer(NioEndpoint.java:1231)

 循环往复的调用，但是这个有一个问题就是 在点开的间隙如果来消息那么是接收不到的。

2.经过学习，可能是nginx的原因，将nginx接口的超时时间加长就好了

 具体如下：

location /socket/ {
    proxy_pass http://xxxxx/socket/;
    proxy_http_version 1.1;
	proxy_connect_timeout 86400s;
    proxy_read_timeout 86400s;
    proxy_send_timeout 86400s;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_set_header X-real-ip $remote_addr;
    proxy_set_header X-Forwarded-For $remote_addr;
}