java.net.ConnectException: Connection refused: no further information
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) ~[na:1.8.0_202]
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717) ~[na:1.8.0_202]
at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:327) ~[netty-transport-4.1.33.Final.jar:4.1.33.Final]
at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:340) ~[netty-transport-4.1.33.Final.jar:4.1.33.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:665) ~[netty-transport-4.1.33.Final.jar:4.1.33.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:612) ~[netty-transport-4.1.33.Final.jar:4.1.33.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:529) ~[netty-transport-4.1.33.Final.jar:4.1.33.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:491) ~[netty-transport-4.1.33.Final.jar:4.1.33.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:905) ~[netty-common-4.1.33.Final.jar:4.1.33.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.33.Final.jar:4.1.33.Final]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_202]

 需要启动redis