Hello We have a 9 DataNode CentOs 6 cluster running HDP 2.6.1 & Ambari 2.5.1 Lately we've noticed that one data node lost heartbeat in Ambari. We restarted the ambari agent on the data node but it didn't help. We restarted the entire DataNode server but no luck. We did notice that: - /usr/bin/python /usr/lib/python2.6/site-packages/ambari_agent/main.py start is always on 100% cpu (centos6), while in all other nodes it barely uses 1%. - The ambari-agent.log shows no errors besides a timeout while checking the JCE. It runs the following command: "/usr/jdk64/jdk1.8.0_77/bin/java -jar /var/lib/ambari-agent/tools/jcepolicyinfo.jar -tu" and receives a timeout. Running the command manually does return a result after 6 seconds, while in other datanodes in just 1 second. (thus the timeout which is 5 seconds). - ambari agent is 2.5.1.0-159.x86_64 same as all other DN's - java version is 1.8.0_77 same as all other DN's - NodeManager works without a problem on that data node and it runs applications fine. It's just the heartbeat/ambari-agent issue. - Name resolution & netwrok between data node & ambari is working fine. Any advice will be appreciated. Adi ... View more

After upgrading to from Ambari 2.1.2.1 to Ambari 2.4.2.0 i can no longer edit Capacity Scheduler queues. I receive: Warning! You do not have permission to edit the Capacity Scheduler configuration. Contact your Cluster administrator. However, my user is Amabri Administrator user: Even the Audit log confirms this: If i login with the default local Admin user - it works and i can change queues configuration. The only thing that has changed is the Ambari version due to the upgrade. No changes were made to my user which is and always have been an Administrator user. Any ideas ? ... View more