ssh-agent : FATAL: Could not find a suitable ssh-agent provider

[Kevin Zhou]

I got stuck on setup ssh access in jenkins, I have ssh-agent plugin installed. And got following in the log :

I am running with :
CentOS release 6.3

Jenkins ver. 1.547
SSH Agent Plugin  1.4.1

[ssh-agent] Using credentials pkg
[ssh-agent] Looking for ssh-agent implementation...
[ssh-agent]   Java/JNR ssh-agent
[ssh-agent] FATAL: Could not find a suitable ssh-agent provider
[ssh-agent] Diagnostic report
[ssh-agent] * Java/JNR ssh-agent
[ssh-agent]     java.lang.NoClassDefFoundError: Could not initialize class jnr.unixsocket.Native$LibC
[ssh-agent]     	at jnr.unixsocket.Native.libsocket(Native.java:60)
[ssh-agent]     	at jnr.unixsocket.Native.socket(Native.java:68)
[ssh-agent]     	at jnr.unixsocket.UnixServerSocketChannel.<init>(UnixServerSocketChannel.java:38)
[ssh-agent]     	at jnr.unixsocket.UnixServerSocket.<init>(UnixServerSocket.java:29)
[ssh-agent]     	at jnr.unixsocket.UnixServerSocketChannel.open(UnixServerSocketChannel.java:48)
[ssh-agent]     	at com.cloudbees.jenkins.plugins.sshagent.jna.AgentServer.start(AgentServer.java:67)
[ssh-agent]     	at com.cloudbees.jenkins.plugins.sshagent.jna.JNRRemoteAgent.<init>(JNRRemoteAgent.java:64)
[ssh-agent]     	at com.cloudbees.jenkins.plugins.sshagent.jna.JNRRemoteAgentStarter.call(JNRRemoteAgentStarter.java:54)
[ssh-agent]     	at com.cloudbees.jenkins.plugins.sshagent.jna.JNRRemoteAgentStarter.call(JNRRemoteAgentStarter.java:35)
[ssh-agent]     	at hudson.remoting.LocalChannel.call(LocalChannel.java:45)
[ssh-agent]     	at com.cloudbees.jenkins.plugins.sshagent.jna.JNRRemoteAgentFactory.start(JNRRemoteAgentFactory.java:61)
[ssh-agent]     	at com.cloudbees.jenkins.plugins.sshagent.SSHAgentBuildWrapper$SSHAgentEnvironment.<init>(SSHAgentBuildWrapper.java:211)
[ssh-agent]     	at com.cloudbees.jenkins.plugins.sshagent.SSHAgentBuildWrapper.createSSHAgentEnvironment(SSHAgentBuildWrapper.java:123)
[ssh-agent]     	at com.cloudbees.jenkins.plugins.sshagent.SSHAgentBuildWrapper.preCheckout(SSHAgentBuildWrapper.java:93)
[ssh-agent]     	at jenkins.scm.SCMCheckoutStrategy.preCheckout(SCMCheckoutStrategy.java:78)
[ssh-agent]     	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:560)
[ssh-agent]     	at hudson.model.Run.execute(Run.java:1678)
[ssh-agent]     	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
[ssh-agent]     	at hudson.model.ResourceController.execute(ResourceController.java:88)
[ssh-agent]     	at hudson.model.Executor.run(Executor.java:231)
FATAL: [ssh-agent] Unable to start agent
hudson.util.IOException2: [ssh-agent] Unable to start agent
	at com.cloudbees.jenkins.plugins.sshagent.SSHAgentBuildWrapper.createSSHAgentEnvironment(SSHAgentBuildWrapper.java:130)
	at com.cloudbees.jenkins.plugins.sshagent.SSHAgentBuildWrapper.preCheckout(SSHAgentBuildWrapper.java:93)
	at jenkins.scm.SCMCheckoutStrategy.preCheckout(SCMCheckoutStrategy.java:78)
	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:560)
	at hudson.model.Run.execute(Run.java:1678)
	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
	at hudson.model.ResourceController.execute(ResourceController.java:88)
	at hudson.model.Executor.run(Executor.java:231)
Caused by: java.lang.RuntimeException: [ssh-agent] Could not find a suitable ssh-agent provider.
	at com.cloudbees.jenkins.plugins.sshagent.SSHAgentBuildWrapper$SSHAgentEnvironment.<init>(SSHAgentBuildWrapper.java:229)
	at com.cloudbees.jenkins.plugins.sshagent.SSHAgentBuildWrapper.createSSHAgentEnvironment(SSHAgentBuildWrapper.java:123)
	... 7 more


I have tested with command line, and my private key works. 

Please help me out there. 

Kevin Z

[Stephen Connolly]

you most likely will have to set up the  Apache Tomcat Native libraries on the build slave. see the plugin's wiki page for more details.

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[marcus....@titansgroup.com.br]

Hi guys!

We are facing the same problem here and  would like to ask for some help...
We are trying to set up a master/slave environmet using Amazon ec2 Plugin (https://wiki.jenkins-ci.org/display/JENKINS/Amazon+EC2+Plugin)

Here is the build log:

Started by user anonymous
Building in workspace /var/lib/jenkins/workspace/project-name

[ssh-agent] Using credentials project-jenkins (GitHub account)

[ssh-agent] Looking for ssh-agent implementation...
[ssh-agent]   Java/JNR ssh-agent
[ssh-agent] FATAL: Could not find a suitable ssh-agent provider
[ssh-agent] Diagnostic report
[ssh-agent] * Java/JNR ssh-agent

[ssh-agent]     java.lang.NoClassDefFoundError: jnr/unixsocket/UnixSocketAddress
[ssh-agent]         at com.cloudbees.jenkins.plugins.sshagent.jna.JNRRemoteAgent.<init>(JNRRemoteAgent.java:63)

[ssh-agent]         at com.cloudbees.jenkins.plugins.sshagent.jna.JNRRemoteAgentStarter.call(JNRRemoteAgentStarter.java:54)
[ssh-agent]         at com.cloudbees.jenkins.plugins.sshagent.jna.JNRRemoteAgentStarter.call(JNRRemoteAgentStarter.java:35)
[ssh-agent]         at hudson.remoting.LocalChannel.call(LocalChannel.java:45)
[ssh-agent]         at com.cloudbees.jenkins.plugins.sshagent.jna.JNRRemoteAgentFactory.start(JNRRemoteAgentFactory.java:61)

[ssh-agent]         at com.cloudbees.jenkins.plugins.sshagent.SSHAgentBuildWrapper$SSHAgentEnvironment.<init>(SSHAgentBuildWrapper.java:314)
[ssh-agent]         at com.cloudbees.jenkins.plugins.sshagent.SSHAgentBuildWrapper.createSSHAgentEnvironment(SSHAgentBuildWrapper.java:224)
[ssh-agent]         at com.cloudbees.jenkins.plugins.sshagent.SSHAgentBuildWrapper.preCheckout(SSHAgentBuildWrapper.java:189)
[ssh-agent]         at jenkins.scm.SCMCheckoutStrategy.preCheckout(SCMCheckoutStrategy.java:76)
[ssh-agent]         at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:531)
[ssh-agent]         at hudson.model.Run.execute(Run.java:1744)
[ssh-agent]         at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
[ssh-agent]         at hudson.model.ResourceController.execute(ResourceController.java:98)
[ssh-agent]         at hudson.model.Executor.run(Executor.java:374)
[ssh-agent]     Caused by: java.lang.ClassNotFoundException: jnr.unixsocket.UnixSocketAddress
[ssh-agent]         at hudson.ClassicPluginStrategy$DependencyClassLoader.findClass(ClassicPluginStrategy.java:694)
[ssh-agent]         at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
[ssh-agent]         at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
[ssh-agent]         at org.apache.tools.ant.AntClassLoader.findBaseClass(AntClassLoader.java:1387)
[ssh-agent]         at org.apache.tools.ant.AntClassLoader.loadClass(AntClassLoader.java:1080)
[ssh-agent]         at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
[ssh-agent]         ... 14 more

FATAL: [ssh-agent] Unable to start agent
hudson.util.IOException2: [ssh-agent] Unable to start agent

    at com.cloudbees.jenkins.plugins.sshagent.SSHAgentBuildWrapper.createSSHAgentEnvironment(SSHAgentBuildWrapper.java:231)
    at com.cloudbees.jenkins.plugins.sshagent.SSHAgentBuildWrapper.preCheckout(SSHAgentBuildWrapper.java:189)
    at jenkins.scm.SCMCheckoutStrategy.preCheckout(SCMCheckoutStrategy.java:76)
    at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:531)
    at hudson.model.Run.execute(Run.java:1744)
    at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
    at hudson.model.ResourceController.execute(ResourceController.java:98)
    at hudson.model.Executor.run(Executor.java:374)

Caused by: java.lang.RuntimeException: [ssh-agent] Could not find a suitable ssh-agent provider.

    at com.cloudbees.jenkins.plugins.sshagent.SSHAgentBuildWrapper$SSHAgentEnvironment.<init>(SSHAgentBuildWrapper.java:332)
    at com.cloudbees.jenkins.plugins.sshagent.SSHAgentBuildWrapper.createSSHAgentEnvironment(SSHAgentBuildWrapper.java:224)
    ... 7 more
Finished: FAILURE

Thanks!

Marcus