Jenkins Windows从属连接由于java.nio.channels.ClosedChannelException而终止

Question

当作为奴隶连接到Windows机器时，我遇到以下错误，我认为它是一些与网络相关的问题，但是需要一些帮助，以便从哪里开始查找或者这有什么可能的解决方案。

INFO: Terminated
Aug 01, 2017 10:15:54 PM hudson.remoting.JarCacheSupport$1 run
WARNING: Failed to resolve a jar 06bcb4519543f5ec83cf9d6da9f6cfbe
java.io.IOException: Failed to write to C:\Users\Administrator\.jenkins\cache\jars\06\BCB4519543F5EC83CF9D6DA9F6CFBE.jar
        at hudson.remoting.FileSystemJarCache.retrieve(FileSystemJarCache.java:133)
        at hudson.remoting.JarCacheSupport$1.run(JarCacheSupport.java:64)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:483)
        at java.util.concurrent.FutureTask.run(FutureTask.java:274)
        at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:110)
        at java.lang.Thread.run(Thread.java:809)
Caused by: java.io.IOException: Backing channel 'JNLP4-connect connection to dr2r4m1p21/172.20.238.41:9001' is disconnected.
        at hudson.remoting.RemoteInvocationHandler.channelOrFail(RemoteInvocationHandler.java:192)
        at hudson.remoting.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:257)
        at com.sun.proxy.$Proxy4.writeJarTo(Unknown Source)
        at hudson.remoting.FileSystemJarCache.retrieve(FileSystemJarCache.java:98)
        ... 5 more
Caused by: java.nio.channels.ClosedChannelException
        at org.jenkinsci.remoting.protocol.impl.ChannelApplicationLayer.onReadClosed(ChannelApplicationLayer.java:208)
        at org.jenkinsci.remoting.protocol.ApplicationLayer.onRecvClosed(ApplicationLayer.java:222)
        at org.jenkinsci.remoting.protocol.ProtocolStack$Ptr.onRecvClosed(ProtocolStack.java:832)
        at org.jenkinsci.remoting.protocol.FilterLayer.onRecvClosed(FilterLayer.java:287)
        at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.onRecvClosed(SSLEngineFilterLayer.java:181)
        at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.switchToNoSecure(SSLEngineFilterLayer.java:283)
        at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.processWrite(SSLEngineFilterLayer.java:503)
        at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.processQueuedWrites(SSLEngineFilterLayer.java:248)
        at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.doSend(SSLEngineFilterLayer.java:200)
        at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.onRecvClosed(SSLEngineFilterLayer.java:166)
        at org.jenkinsci.remoting.protocol.ProtocolStack$Ptr.onRecvClosed(ProtocolStack.java:832)
        at org.jenkinsci.remoting.protocol.NetworkLayer.onRecvClosed(NetworkLayer.java:154)
        at org.jenkinsci.remoting.protocol.impl.BIONetworkLayer.access$1500(BIONetworkLayer.java:48)
        at org.jenkinsci.remoting.protocol.impl.BIONetworkLayer$Reader.run(BIONetworkLayer.java:247)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1157)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:627)
        at hudson.remoting.Engine$1$1.run(Engine.java:94)
        ... 1 more

上面提到的堆栈跟踪来自于salve（Windows）机器，并且我的Jenkins / Master在RHEL上运行，我在那里可以看到以下堆栈跟踪。

INFO: Accepted JNLP4-connect connection #113 from /172.20.238.31:60363
Aug 01, 2017 12:45:55 PM jenkins.slaves.DefaultJnlpSlaveReceiver channelClosed
WARNING: Computer.threadPoolForRemoting [#42] for Build_Agent terminated
java.nio.channels.ClosedChannelException
        at org.jenkinsci.remoting.protocol.impl.ChannelApplicationLayer.onReadClosed(ChannelApplicationLayer.java:208)
        at org.jenkinsci.remoting.protocol.ApplicationLayer.onRecvClosed(ApplicationLayer.java:222)
        at org.jenkinsci.remoting.protocol.ProtocolStack$Ptr.onRecvClosed(ProtocolStack.java:832)
        at org.jenkinsci.remoting.protocol.FilterLayer.onRecvClosed(FilterLayer.java:287)
        at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.onRecvClosed(SSLEngineFilterLayer.java:181)
        at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.switchToNoSecure(SSLEngineFilterLayer.java:283)
        at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.processWrite(SSLEngineFilterLayer.java:503)
        at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.processQueuedWrites(SSLEngineFilterLayer.java:248)
        at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.doSend(SSLEngineFilterLayer.java:200)
        at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.doCloseSend(SSLEngineFilterLayer.java:213)
        at org.jenkinsci.remoting.protocol.ProtocolStack$Ptr.doCloseSend(ProtocolStack.java:800)
        at org.jenkinsci.remoting.protocol.ApplicationLayer.doCloseWrite(ApplicationLayer.java:173)
        at org.jenkinsci.remoting.protocol.impl.ChannelApplicationLayer$ByteBufferCommandTransport.closeWrite(ChannelApplicationLayer.java:311)
        at hudson.remoting.Channel.close(Channel.java:1295)
        at hudson.remoting.Channel.close(Channel.java:1263)
        at jenkins.slaves.DefaultJnlpSlaveReceiver.afterChannel(DefaultJnlpSlaveReceiver.java:173)
        at org.jenkinsci.remoting.engine.JnlpConnectionState$4.invoke(JnlpConnectionState.java:421)
        at org.jenkinsci.remoting.engine.JnlpConnectionState.fire(JnlpConnectionState.java:312)
        at org.jenkinsci.remoting.engine.JnlpConnectionState.fireAfterChannel(JnlpConnectionState.java:418)
        at org.jenkinsci.remoting.engine.JnlpProtocol4Handler$Handler$1.run(JnlpProtocol4Handler.java:334)
        at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)

Answer 1

• 我们的詹金斯大师更新后，我观察到相同的错误。可能是由于Java 7（v80）与最新的Java 8不兼容。
• 检查主服务器正在使用的Java版本以及从服务器正在使用的Java版本。
• 就我而言，我在Linux主机上运行swarm-client-2.0-jar-with-dependencies.jar，它使用的是Java 7。

Java版本“ 1.7.0_80” Java™SE运行时环境（内部版本1.7.0_80-b15）Java
HotSpot（TM）64位服务器VM（内部版本24.80-b11，混合模式）

• 我们的jenkins主服务器已升级，现在正在运行Java 8

Java版本“ 1.8.0_121” Java™SE运行时环境（内部版本1.8.0_121-b13）Java
HotSpot（TM）64位服务器VM（内部版本25.121-b13，混合模式）

• 当从属服务器上的Java更新为Java 8时，连接问题消失了。