I have latest HDP 2.5 installed and controlled by Ambari. The Zepellin Notebook service never starts. Logs revealed that exception is thrown, which indicates "This address is already in use". Some search on Internet revealed that problem may be caused by the fact that another program is using Zepellin's port 9995. However netstat command does not show anything using this port. Also I tried to change port to 9996 and it did not help either. It looks like the exception's message is misleading and problem is somewhere else. Any help on this would be appreciated. ... View more

In a freshly installed Ambari server most views did not point to a cluster name (the cluster name was empty). This was strange itself, but even more disappointing was the fact that also I was not able to modify Hive view. The pop came with the message: Can't save settings. Server error which was not very informative... The attempts to find any relevant information in Ambari server logs also were unsuccessful. So where should I look further? ... View more

I installed Sandbox within VMWare running in Windows 10. I noticed that Ambari dashboard reports 0 live data nodes. And this is probably why I can't write any file in HDFS. Are data nodes not available in Sandbox upon install? Do I need to manually create them? ... View more