Hi Thanuja, I was referring to the build fail in [1]. Please see line starting from:
2015-10-02 07:28:32 INFO {org.wso2.carbon.automation.extensions.servers.utils.ServerLogReader}:70 - [2015-10-02 07:28:32,834] ERROR {org.apache.stratos.autoscaler.rule.RuleTasksDelegator} - Cannot terminate instance I think this is a separate issue that occurs very rarely. As you noticed, NPE in GroupMonitor occurs when undeploying applications. The problem is group monitors are retrieving the status from other group monitor objects. @Reka: shall we change that logic to read the application status from topology or ApplicationHolder instead of reading from monitors? [1] https://builds.apache.org/job/Stratos-41x-Commit-Build/68/consoleFull Thanks.