@vinodnerella  It depends based on the scenario that how much Heap you should be allocating for the Zookeeper. In your case if you are keep noticing that the Zookeeper heap is reaching to its max 1GB then it is better to increase the Zookeeper heap to a larger value and if needed then enable GC logging for zookeeper to monitor the gc usages in a period of time to findout the approximate heap that you need to setup for your zookeeper based on the environment requirement. As you have already set the Zookeeper heap to 4GB it should be good for now. We can monitor it for some time.   The common cause of Zookeeper OutOfMemory can be when clients submit requests faster than ZooKeeper can process them, especially if there are a lot of clients.  The it can lead to OOM errors.   You can also take a look into parameters like "zookeeper.snapCount"  but better to monitor Zookeeper with 4GB heap for some time before tuning such parameters.  ... View more

@Sona, Sorry I missed your question in May. For (1), please refer to my previous update. For (2), yes all paths that store Hive databases/tables should be managed by Hive/Sentry, so those paths should be configured under Sentry Synchronization Path Prefixes setting and need to be owned by "hive:hive". The idea of Sentry is to have everything managed by "hive" so that no one can do direct modifications without going through Hive/Sentry. Cheers Eric ... View more