Hello,
please help with the problem that appear before upgrading to version 2.319.0 and after that. The configuration was made in the Windows Server environment according to the instructions:
https://www.jenkins.io/doc/book/installing/windowshttps://www.jenkins.io/doc/book/system-administration/reverse-proxy-configuration-iis/
Everything worked for a long time until it suddenly stopped ...
With Windows 10, I can only connect with the command:
java -jar agent.jar -jnlpUrl https: //jenkins.test.test/computer/testeb2/jenkins-agent.jnlp -secret 932978cb04ae90dc388e49f0e18de9455a2572869b50dad32b0e26b79920e7 "Dad32b0e26b79920e7"

When I use jenkins-agent.jnlp it says terminated

Logs:

java.nio.channels.ClosedChannelException
at org.jenkinsci.remoting.protocol.impl.ChannelApplicationLayer.onReadClosed(ChannelApplicationLayer.java:238)
at org.jenkinsci.remoting.protocol.ApplicationLayer.onRecvClosed(ApplicationLayer.java:221)
at org.jenkinsci.remoting.protocol.ProtocolStack$Ptr.onRecvClosed(ProtocolStack.java:825)
at org.jenkinsci.remoting.protocol.FilterLayer.onRecvClosed(FilterLayer.java:288)
at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.onRecvClosed(SSLEngineFilterLayer.java:179)
at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.switchToNoSecure(SSLEngineFilterLayer.java:281)
at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.processWrite(SSLEngineFilterLayer.java:501)
at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.processQueuedWrites(SSLEngineFilterLayer.java:246)
at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.doSend(SSLEngineFilterLayer.java:198)
at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.doCloseSend(SSLEngineFilterLayer.java:211)
at org.jenkinsci.remoting.protocol.ProtocolStack$Ptr.doCloseSend(ProtocolStack.java:793)
at org.jenkinsci.remoting.protocol.ApplicationLayer.doCloseWrite(ApplicationLayer.java:172)
at org.jenkinsci.remoting.protocol.impl.ChannelApplicationLayer$ByteBufferCommandTransport.closeWrite(ChannelApplicationLayer.java:340)
at hudson.remoting.Channel.close(Channel.java:1501)
at hudson.remoting.Channel.close(Channel.java:1454)
at jenkins.slaves.DefaultJnlpSlaveReceiver.afterChannel(DefaultJnlpSlaveReceiver.java:178)
at org.jenkinsci.remoting.engine.JnlpConnectionState.fire(JnlpConnectionState.java:337)
at org.jenkinsci.remoting.engine.JnlpConnectionState.fireAfterChannel(JnlpConnectionState.java:428)
at org.jenkinsci.remoting.engine.JnlpProtocol4Handler$Handler.lambda$onChannel$0(JnlpProtocol4Handler.java:334)
at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:68)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)