I’m trying to install an small-testing HDP cluster (only 4 nodes), using ambari 188.8.131.52 with the 2.0.6 stack, on RHEL6 and using OpenJDK7 by default. Finally we have been able to install it, but the start and test phases of the wizard ended with some warnings. When we accessed ambari-server UI we found out that HistoryServer and NameNode were not running. We tried to start them individually and they seemed to start, but after a while they stopped. The rest of the services are up and running.
This is my very first time using HDP and it is being very difficult to follow what is happening: in ambari-server and ambari-agents logs there were no information about the errors. I cannot find the log file for the NameNode, that, I believe, might be in /var/log/hadoop/hdfs, but there are only logs related to the SecondaryNameNode, that is up and running. In the end, I have no clues on what is actually happening. I also tried to follow the troubleshooting points, but nothing seems to be related to this particular case.
Finally, I repeated the full installation three times, but the result is the same.
Could someone give me some advice on how to debug it?
Thanks a lot.