The project does not report an error, operates normally, and cannot request services

Let's talk about my final solution ：

Cause ：idea The breakpoint is on the method name , Cause the project to fail to run   

debug Starting mode , Can't start .    Because this is the method breakpoint

Don't open debug    Normal operation mode can start normally

I have been checking this problem for a long time , It took a long time to find the key to the problem , In initial use idea In fact, I have encountered this problem before , But it was quickly solved

1. Think the project is running successfully , And there is no error . I went to How to find out ？  ping Redis  Found that it can work normally
2. Think it's a code problem , exclusions , Yesterday was normal , Nothing , Back up the current code , Revert to yesterday's code . I can't find it
3. An error is reported during the period , Thought it was Redisson jar Caused by ,  Or is it Netty It's caused by conflict .   This one took a lot of time

4. Package and put it on the server , It is found that it can operate normally .  This step is crucial , We can locate the problem at once . then cmd stay windows It can also run normally , That means idea What the hell  

problem 3 Recorded error information ：

ERROR o.r.c.h.ErrorsLoggingHandler - Exception occured. Channel: [id: 0x6f524ea6, L:/192.168.1.15:51150 - R:/129.:6379]
java.io.IOException:  The remote host forced an existing connection to be closed .
	at sun.nio.ch.SocketDispatcher.read0(Native Method)
	at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43)
	at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
	at sun.nio.ch.IOUtil.read(IOUtil.java:192)
	at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379)
	at io.netty.buffer.PooledUnsafeDirectByteBuf.setBytes(PooledUnsafeDirectByteBuf.java:288)
	at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1125)
	at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:347)
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:148)
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:682)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:617)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:534)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:496)
	at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:906)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.lang.Thread.run(Thread.java:745)
[]-2020-12-25 15:51:16.747 [redisson-timer-4-1] ERROR o.r.c.h.PingConnectionHandler - Unable to send PING command over channel: [id: 0x6f524ea6, L:/192.168:51150 ! R:/129.20xx:6379]
org.redisson.client.RedisTimeoutException: Command execution timeout for command: (PING), params: [], Redis client: [addr=redis://129.2xx:6379]
	at org.redisson.client.RedisConnection.lambda$async$1(RedisConnection.java:207)
	at org.redisson.client.RedisConnection$$Lambda$376/1172508.run(Unknown Source)
	at io.netty.util.HashedWheelTimer$HashedWheelTimeout.expire(HashedWheelTimer.java:682)
	at io.netty.util.HashedWheelTimer$HashedWheelBucket.expireTimeouts(HashedWheelTimer.java:757)
	at io.netty.util.HashedWheelTimer$Worker.run(HashedWheelTimer.java:485)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.lang.Thread.run(Thread.java:745)

This line of code represents the operation of the whole project

[]-2020-12-26 10:25:35.763 [main] INFO  cn.blogspring.Application - Started Application in 31.123 seconds (JVM running for 32.419)

At this time, it hasn't run at all , Just the context loading is finished

[]-2020-12-26 10:27:13.555 [main] INFO  o.s.w.c.ContextLoader - Root WebApplicationContext: initialization completed in 4956 ms