Probably malplaced @Extension

I’,m gettin the following error with the current release:

Sep 15, 2016 12:57:37 PM hudson.model.Descriptor verifyNewInstance
WARNING: Father of com.nirima.jenkins.plugins.docker.strategy.DockerOnceRetentionStrategy@186aa533 and its getDescriptor() points to two different instances. Probably malplaced @Extension. See http://hudson.361315.n4.nabble.com/Help-Hint$
needed-Post-build-action-doesn-t-stay-activated-td2308833.html
Sep 15, 2016 12:57:37 PM hudson.model.Descriptor verifyNewInstance
WARNING: Father of com.nirima.jenkins.plugins.docker.launcher.DockerComputerSSHLauncher@263b1ebc and its getDescriptor() points to two different instances. Probably malplaced @Extension. See http://hudson.361315.n4.nabble.com/Help-Hint-n$
eded-Post-build-action-doesn-t-stay-activated-td2308833.html

As far as I rember those warnings mean that settings done to this job will not get applied correctly.

[uditjh]

Thank you. I was able to resolve it just now. This is what I have learned.

1. Use docker version 1.11.2 or lower.
2. You will need to open all the ports between Jenkins master and Docker Host. The plugin doesnt print if the port its using is not open. I only had the docker host API port open which would get me the Test Connection to pass but wasnt able to run the job on the container. SSH port is open on [Docker Host IP]:32769 SSH port is open on [Docker Host IP]:32770

[ndeloof]

fixed by https://github.com/jenkinsci/docker-plugin/commit/75089b2e705a1463f9aa9920ea95d238ee42ccca