Erro no Slave do Linux do Jenkins: SEVERE: erro de E / S no canal do canal

Question

Estou recebendo este erro em todos os servidores Linux para tentar iniciar um Slave. A versão éJenkins ver. 1.532.1. Eu não tive esse problema quando eu tenho outra instalação com Jenkins ver. 1.509.4.

Eu li muitos posts na Internet sobre esse problema, ainda não tenho nenhuma pista para corrigi-lo. Quase quer remover esta instalação e instalar o ver mais antigo. 1.509.4 agora.

Alguém pode dar uma ideia de como depurar isso?

O jenkins.log:

Dec 20, 2013 9:38:24 AM jenkins.slaves.JnlpSlaveAgentProtocol$Handler$1 onClosed
WARNING: Channel reader thread: trmsrv43 for + trmsrv43 terminated
java.net.SocketException: Socket closed


bash-3.00$ java  -jar slave.jar -jnlpUrl htttp://name:8080/computer/trmsrv43/slave-agent.jnlp
20-Dec-2013 9:37:47 AM hudson.remoting.jnlp.Main$CuiListener <init>
INFO: Jenkins agent is running in headless mode.
20-Dec-2013 9:37:47 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Locating server among [htttp://name:8080/, htttp://name:8080/]
20-Dec-2013 9:38:02 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Connecting to name:45606
20-Dec-2013 9:38:02 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Handshaking
20-Dec-2013 9:38:02 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Connected
20-Dec-2013 9:38:03 AM hudson.remoting.SynchronousCommandTransport$ReaderThread run
SEVERE: I/O error in channel channel
java.io.IOException: Unexpected termination of the channel
        at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:50)
Caused by: java.io.EOFException
hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:48)
20-Dec-2013 9:38:03 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Terminated
20-Dec-2013 9:38:03 AM hudson.remoting.JarCacheSupport$1 run
WARNING: Failed to resolve a jar e42831c9e9138e2761253da84a096665
hudson.remoting.RemotingSystemException: hudson.remoting.ChannelClosedException: channel is already closed
caused by: hudson.remoting.ChannelClosedException: channel is already closed
        at hudson.remoting.Channel.send(Channel.java:516)
        at hudson.remoting.Request.call(Request.java:129)
        at hudson.remoting.Channel.call(Channel.java:714)
        at hudson.remoting.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:167)
        ... 10 more
Caused by: java.io.IOException: Unexpected termination of the channel
        at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:50)

20-Dec-2013 9:38:13 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Locating server among [htttp://name:8080/]
20-Dec-2013 9:38:13 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Connecting to name:45606
20-Dec-2013 9:38:13 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Handshaking
20-Dec-2013 9:38:13 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Connected
20-Dec-2013 9:38:13 AM hudson.remoting.SynchronousCommandTransport$ReaderThread run
SEVERE: I/O error in channel channel
java.io.IOException: Unexpected termination of the channel
        at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:50)
20-Dec-2013 9:38:13 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Terminated
20-Dec-2013 9:38:23 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Locating server among [htttp://name:8080/]
20-Dec-2013 9:38:23 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Connecting to name:45606
20-Dec-2013 9:38:23 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Handshaking
20-Dec-2013 9:38:23 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Connected
20-Dec-2013 9:38:24 AM hudson.remoting.SynchronousCommandTransport$ReaderThread run
SEVERE: I/O error in channel channel
java.io.IOException: Unexpected termination of the channel
        at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:50)
20-Dec-2013 9:38:24 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Terminated

    

Answer 1

Nós nos deparamos com esse problema ao atualizar para o Jenkins 2.60.1. Essa versão é a primeira versão LTS a requerer o Java 8 e nos certificamos de atualizar o mestre para usar o Java 8. Infelizmente, os escravos não começariam, dando o erro que você reporta no título.

O problema era que os nós escravos estavam começando a usar o Java 7 e tivemos que usar o botão "Avançado" na página de configuração do nó para garantir que o caminho Java correto fosse usado pelos nós escravos