不太使用jenkins，但使用docker slave作业。我建立了一个docker云，并在其中部署了一个镜像。当我开始jenkins作业时，镜像被拉了出来，然后我看到了这个错误。似乎是试图运行远程-4.5.jar的错误。有其他方法可以查看发生了什么吗？
HTTP/1.1 101 UPGRADED
Content-Type: application/vnd.docker.raw-stream
Connection: Upgrade
Upgrade: tcp
Api-Version: 1.40
Docker-Experimental: false
Ostype: linux
Server: Docker/19.03.13 (linux)
cannot exec in a stopped state: unknown
ERROR: Unexpected error in launching an agent. This is probably a bug in Jenkins
Also: java.lang.Throwable: launched here
at hudson.slaves.SlaveComputer._connect(SlaveComputer.java:283)
at hudson.model.Computer.connect(Computer.java:435)
at com.nirima.jenkins.plugins.docker.strategy.DockerOnceRetentionStrategy.start(DockerOnceRetentionStrategy.java:80)
at com.nirima.jenkins.plugins.docker.strategy.DockerOnceRetentionStrategy.start(DockerOnceRetentionStrategy.java:35)
at hudson.model.AbstractCIBase.updateComputer(AbstractCIBase.java:162)
at hudson.model.AbstractCIBase.access$000(AbstractCIBase.java:44)
at hudson.model.AbstractCIBase$2.run(AbstractCIBase.java:224)
at hudson.model.Queue._withLock(Queue.java:1398)
at hudson.model.Queue.withLock(Queue.java:1275)
at hudson.model.AbstractCIBase.updateComputerList(AbstractCIBase.java:207)
at jenkins.model.Jenkins.updateComputerList(Jenkins.java:1635)
at jenkins.model.Nodes$2.run(Nodes.java:139)
at hudson.model.Queue._withLock(Queue.java:1398)
at hudson.model.Queue.withLock(Queue.java:1275)
at jenkins.model.Nodes.addNode(Nodes.java:135)
at jenkins.model.Jenkins.addNode(Jenkins.java:2158)
at com.nirima.jenkins.plugins.docker.DockerCloud.robustlyAddNodeToJenkins(DockerCloud.java:445)
at com.nirima.jenkins.plugins.docker.DockerCloud.access$000(DockerCloud.java:68)
at com.nirima.jenkins.plugins.docker.DockerCloud$1.run(DockerCloud.java:381)
at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)
java.io.EOFException: unexpected stream termination
at hudson.remoting.ChannelBuilder.negotiate(ChannelBuilder.java:415)
at hudson.remoting.ChannelBuilder.build(ChannelBuilder.java:360)
at hudson.slaves.SlaveComputer.setChannel(SlaveComputer.java:425)
at hudson.slaves.SlaveComputer.setChannel(SlaveComputer.java:392)
at io.jenkins.docker.connector.DockerComputerAttachConnector$DockerAttachLauncher.launch(DockerComputerAttachConnector.java:319)
at hudson.slaves.DelegatingComputerLauncher.launch(DelegatingComputerLauncher.java:64)
at io.jenkins.docker.connector.DockerDelegatingComputerLauncher.launch(DockerDelegatingComputerLauncher.java:37)
at hudson.slaves.SlaveComputer.lambda$_connect$0(SlaveComputer.java:294)
at jenkins.util.ContextResettingExecutorService$2.call(ContextResettingExecutorService.java:46)
at jenkins.security.ImpersonatingExecutorService$2.call(ImpersonatingExecutorService.java:71)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)
不确定你是否解决了这个问题，但我们遇到了同样的问题，结果是"远程文件系统根"；字段为空。我们将其设置为在"；"连接方法"；(对我们来说是"Attach Docker container"(部分(在这种情况下是/home/jenkins(，它能够启动代理。