When i deploy with the deployer plugin Websphere we have this error :

_Building in workspace /var/lib/jenkins/workspace/AssysTestDeploy
Connecting to IBM WebSphere Application Server...
The following artifacts will be deployed in this order...
-------------------------------------------
Assys_5.8RC1_22122015-1516.ear
-------------------------------------------
Error deploying to IBM WebSphere Application Server: org.jenkinsci.plugins.websphere.services.deployment.DeploymentServiceException: Could not determine if artifact 'Assys_DEV' is installed: javax.management.ObjectName cannot be cast to javax.management.ObjectName
at org.jenkinsci.plugins.websphere.services.deployment.WebSphereDeploymentService.isArtifactInstalled(WebSphereDeploymentService.java:357)
at org.jenkinsci.plugins.websphere_deployer.WebSphereDeployerPlugin.stopArtifact(WebSphereDeployerPlugin.java:243)
at org.jenkinsci.plugins.websphere_deployer.WebSphereDeployerPlugin.perform(WebSphereDeployerPlugin.java:198)
at hudson.tasks.BuildStepMonitor$3.perform(BuildStepMonitor.java:45)_

i think it's normal because we have several implementation of this class ObjectName... ¨
One From the IBM jar : com.ibm.ws.admin.client_7.0.0.jar
And an other on from JRE....