作者：手浪用户2602924633 | 来源：互联网 | 2023-01-17 14:51
问题：在macOS上起了jenkins，将另外一台win10作为slave，通过启动agent的方式连接master，但是一启动agent就报错，如下：信息:ProtocolJNL
问题：
在macOS上起了jenkins，将另外一台win10作为slave，通过启动agent的方式连接master，但是一启动agent就报错，如下：
信息: Protocol JNLP4-connect encountered an unexpected exception
java.util.concurrent.ExecutionException: org.jenkinsci.remoting.protocol.impl.ConnectionRefusalException: Connection closed before acknowledgement sent
at org.jenkinsci.remoting.util.SettableFuture.get(SettableFuture.java:223)
at hudson.remoting.Engine.innerRun(Engine.java:744)
at hudson.remoting.Engine.run(Engine.java:519)
Caused by: org.jenkinsci.remoting.protocol.impl.ConnectionRefusalException: Connection closed before acknowledgement sent
at org.jenkinsci.remoting.protocol.impl.AckFilterLayer.onRecvClosed(AckFilterLayer.java:283)
at org.jenkinsci.remoting.protocol.FilterLayer.abort(FilterLayer.java:164)
at org.jenkinsci.remoting.protocol.impl.AckFilterLayer.access$000(AckFilterLayer.java:45)
at org.jenkinsci.remoting.protocol.impl.AckFilterLayer$1.run(AckFilterLayer.java:179)
at org.jenkinsci.remoting.protocol.IOHub$DelayedRunnable.run(IOHub.java:964)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at hudson.remoting.Engine$1.lambda$newThread$0(Engine.java:118)
at java.lang.Thread.run(Thread.java:748)
四月 25, 2021 11:13:37 上午 hudson.remoting.jnlp.Main$CuiListener error
严重: The server rejected the connection: None of the protocols were accepted
java.lang.Exception: The server rejected the connection: None of the protocols were accepted
at hudson.remoting.Engine.onConnectionRejected(Engine.java:829)
at hudson.remoting.Engine.innerRun(Engine.java:769)
at hudson.remoting.Engine.run(Engine.java:519)
解决办法：
尝试了很多方式，不管是baidu还是jenkins官方，感觉都没能解决我遇到的这个问题，再次尝试，最终在win10的node上勾选“Use WebSocket”后，再次启动agent，问题解决：
slave的agent启动成功后，连接上master的日志如下：
四月 25, 2021 11:14:18 上午 org.jenkinsci.remoting.engine.WorkDirManager initializeWorkDir
信息: Using D:\jenkins_workdir\remoting as a remoting work directory
四月 25, 2021 11:14:19 上午 org.jenkinsci.remoting.engine.WorkDirManager setupLogging
信息: Both error and output logs will be printed to D:\jenkins_workdir\remoting
四月 25, 2021 11:14:19 上午 hudson.remoting.jnlp.Main createEngine
信息: Setting up agent: laptop-zhaosheng
四月 25, 2021 11:14:19 上午 hudson.remoting.jnlp.Main$CuiListener
信息: Jenkins agent is running in headless mode.
四月 25, 2021 11:14:19 上午 hudson.remoting.Engine startEngine
信息: Using Remoting version: 4.5
四月 25, 2021 11:14:19 上午 org.jenkinsci.remoting.engine.WorkDirManager initializeWorkDir
信息: Using D:\jenkins_workdir\remoting as a remoting work directory
四月 25, 2021 11:14:20 上午 hudson.remoting.jnlp.Main$CuiListener status
信息: WebSocket connection open
四月 25, 2021 11:14:21 上午 hudson.remoting.jnlp.Main$CuiListener status
信息: Connected
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