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Hi Abhimanyu,

Very often you could see that after starting cluster by Savanna all instances are provisioned in the OpenStack successfully. But when instances are up and have status Active, it doesn't mean that Hadoop cluster is ready right now. Because Savanna will take time to connect to all cluster nodes and push configs to it.

So, after the cluster starting you should wait some time to get Hadoop cluster ready. It is expected and can takes up to 2-5 minutes. And setvice Urls are generated at the final moment before the cluster ready.

But if you have another problem please describe it in details.