Following Exception is raised when i run my pipeline script:

{{node {
stage('a') {
sshagent(['tomcat'])

{ sh 'ssh 10.141.86.5 ls' }

}
}}}

{{[Pipeline] node
Running on master in f:\jenkins\workspace\pipetest
[Pipeline] {
[Pipeline] stage
[Pipeline]

{ (a) [Pipeline] sshagent [ssh-agent] Using credentials tomcat [ssh-agent] Looking for ssh-agent implementation... [ssh-agent] FATAL: Could not find a suitable ssh-agent provider [ssh-agent] Diagnostic report [Pipeline] // sshagent [Pipeline] }

[Pipeline] // stage
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
java.lang.RuntimeException: [ssh-agent] Could not find a suitable ssh-agent provider.
at com.cloudbees.jenkins.plugins.sshagent.SSHAgentStepExecution.initRemoteAgent(SSHAgentStepExecution.java:180)
at com.cloudbees.jenkins.plugins.sshagent.SSHAgentStepExecution.start(SSHAgentStepExecution.java:63)
at org.jenkinsci.plugins.workflow.cps.DSL.invokeStep(DSL.java:184)
at org.jenkinsci.plugins.workflow.cps.DSL.invokeMethod(DSL.java:126)}}

At least i was expecting an error from the agent with loading the native lib.