Hi,

 We have a CloudBees Jenkins Enterprise. We have installed the version 1.2.4.1 of the IBM z/OS Connector plugin. One of the development team has reported an issue using this connector.

  When a job with the step Submit zOS Job added, if the job doesn't have enabled Wait for the completion the build finishes with the following message:

Job [JXXXXXX] processing failed. Reason: [].

   With Wait for the completion enabled the build fails with the Java error.

Submitted job [JXXXXXX]
ERROR: Build step failed with exception
java.lang.NullPointerException
at org.jenkinsci.plugins.IBM_zOS_Connector.ZFTPConnector.checkJobAvailability(ZFTPConnector.java:359)
at org.jenkinsci.plugins.IBM_zOS_Connector.ZFTPConnector.waitForCompletion(ZFTPConnector.java:329)
at org.jenkinsci.plugins.IBM_zOS_Connector.ZFTPConnector.submit(ZFTPConnector.java:286)
at org.jenkinsci.plugins.IBM_zOS_Connector.ZFTPConnector.submit(ZFTPConnector.java:223)
at org.jenkinsci.plugins.IBM_zOS_Connector.ZOSJobSubmitter.perform(ZOSJobSubmitter.java:169)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:741)
at hudson.model.Build$BuildExecution.build(Build.java:206)
at hudson.model.Build$BuildExecution.doRun(Build.java:163)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:504)
at hudson.model.Run.execute(Run.java:1880)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:97)
at hudson.model.Executor.run(Executor.java:428)

    I have investigated the issue in our Staging environment of Jenkins. I have upgraded the plugin to different versions with the following results:

• Version 1.2.6 -  Without enabling Wait for the completion the build finishes with the following message:

          Job *[**JXXXXXX**] processing failed. Reason: []*

           With Wait for the completion enabled the build fails with the Java error.

• Version 2.3.1 -  Without enabling Wait for the completion the build finishes with the following message:

          **          Job [**JXXXXXX**] processing finished. Skip waiting.

          With Wait for the completion enabled the build fails with the Java error.

• Version 2.3.1 -  The last version of the plugin. Without enabling Wait for the completion the build finishes with the following message:

          Job [**JXXXXXX**] processing finished. Skip waiting.

            With Wait for the completion enabled the Java error doesn't appears. build fails with the Java error. But the build does not finish successfully. The following messages start to appear:

FTP: connected to mvsprod.asg.com:21
ERROR: failed to list available jobs
FTP: connected to mvsprod.asg.com:21
FTP: connected to mvsprod.asg.com:21
ERROR: failed to list available jobs
FTP: connected to mvsprod.asg.com:21
FTP: connected to mvsprod.asg.com:21
ERROR: failed to list available jobs

Testing I have tried differents configuration in the step Submit zOS Job.

Do you know what the reason for this behavior may be?

If you need more information, please ask me.