Hi,

I have followed the guidelines for setting up linux slave.

https://wiki.jenkins-ci.org/display/JENKINS/Amazon+EC2+Plugin

I have configured all the details in Cloud plugin section and found success in both "Test Connection" and "Check AMI". But when triggered Jenkin job with the "Label",it is always in "(pending—Waiting for next available executor)" . In jenkins log i would see there is error for every three minutes and not able to launch slave

"
WARNING: Exception during provisioning
com.amazonaws.AmazonServiceException: com.eucalyptus.ws.WebServicesException: Missing required object (Service: AmazonEC2; Status Code: 500; Error Code: InternalFailure; Request ID: d0f8e09c-323c-421b-8468-26851a458ad8)

"