【Jenkins】slave-agent发生Connection was broken后的一系列问题

问题：使用docker-jenkins 2.60版本服务，使用"launch slave agents via Java Web Start" 方式来添加远程节点，配置完jenkins后，下载slave.jar文件上传到远程机器并执行一下命令：nohupjava -jar slave.jar -jnlpUrl http://******/computer/test/slave-

jwensh

3273人浏览 · 2018-11-13 14:36:08

jwensh · 2018-11-13 14:36:08 发布

问题：

使用docker-jenkins 2.60版本服务，使用"launch slave agents via Java Web Start" 方式来添加远程节点，配置完jenkins后，下载slave.jar文件上传到远程机器并执行一下命令：

nohup  java -jar slave.jar -jnlpUrl http://******/computer/test/slave-agent.jnlp -secret 07694baafd*******1e1f23b > agent.log 2>&1 &

然后slave节点日志报错：

java.io.IOException: Connection aborted: org.jenkinsci.remoting.nio.NioChannelHub$MonoNioTransport@7029f3e3[name=windows_02]
	at org.jenkinsci.remoting.nio.NioChannelHub$NioTransport.abort(NioChannelHub.java:208)
	at org.jenkinsci.remoting.nio.NioChannelHub.run(NioChannelHub.java:628)
	at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: Connection reset by peer
	at sun.nio.ch.FileDispatcherImpl.read0(Native Method)
	at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
	at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
	at sun.nio.ch.IOUtil.read(IOUtil.java:197)
	at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380)
	at org.jenkinsci.remoting.nio.FifoBuffer$Pointer.receive(FifoBuffer.java:136)
	at org.jenkinsci.remoting.nio.FifoBuffer.receive(FifoBuffer.java:306)
	at org.jenkinsci.remoting.nio.NioChannelHub.run(NioChannelHub.java:561)

jenkins前端页面报错：

Connection was broken
java.io.IOException: Failed to abort
at org.jenkinsci.remoting.nio.NioChannelHub$NioTransport.abort(NioChannelHub.java:184)
at org.jenkinsci.remoting.nio.NioChannelHub.abortAll(NioChannelHub.java:599)
at org.jenkinsci.remoting.nio.NioChannelHub.run(NioChannelHub.java:481)
at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:695)
Caused by: java.nio.channels.ClosedChannelException
at sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:663)
at sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:430)
at org.jenkinsci.remoting.nio.Closeables$1.close(Closeables.java:20)
at org.jenkinsci.remoting.nio.NioChannelHub$MonoNioTransport.closeR(NioChannelHub.java:289)
at org.jenkinsci.remoting.nio.NioChannelHub$NioTransport$1.call(NioChannelHub.java:226)
at org.jenkinsci.remoting.nio.NioChannelHub$NioTransport$1.call(NioChannelHub.java:224)
at org.jenkinsci.remoting.nio.NioChannelHub.run(NioChannelHub.java:474)

排查与解决：

因为agent的插件版本依赖的库与当前jdk环境不同，还有就是jenkins提示了很多插件的版本不支持2.60，所以为了保持dockjer-Jenkins内部使用的jdk版本和服务器节点使用的jdk版本相同就先升级docker-jenkins到2.138.3版本，然后下载新的slave jar包

（最新的是agent.jar）去执行node命令进行链接，但是又报了下面的错误：

Exception in thread "main" java.lang.UnsupportedClassVersionError: hudson/remoting/Launcher : Unsupported major.minor version 52.0
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
	at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)

（根据错误去查询这个错误，java的开发者文档：https://docs.oracle.com/javase/8/docs/api/index.html，文档解释

Thrown when the Java Virtual Machine attempts to read a class file and determines that the major and minor version numbers in the file are not supported. ）

ok，发现是jdk的版本不同，底层库文件不支持，所以还是忘记升级一下服务器的jdk到1.8，升级一下完事再执行就可以了。