I have tried following the instructions in the link below which saves just fine. But when I go to start the Metrics Collector, it will look like it is started but then will show as being in a stopped state. https://cwiki.apache.org/confluence/display/AMBARI/AMS+-+distributed+mode I changed the hbase.zookeeper.property.clientPort property to 2181 as in the doc as well but I noticed in the log it is showing the old port in the socket connection with the following line saying "session... for server null" In the web interface however, I get the following errors: Metrics Collector - ZooKeeper Server ProcessConnection failed: [Errno 111] Connection refused to r9-01.maas:2181Metrics Collector - HBase Master ProcessConnection failed: [Errno 111] Connection refused to r9-01.maas:61310 Here is a little snippet from the /var/log/ambari-metrics-collector.log file. The rest of the log seemed to repeat the same messages. 2016-02-16 16:04:31,425 INFO org.apache.zookeeper.ClientCnxn: Opening socket connection to server localhost/127.0.0.1:61181. Will not attempt to authenticate using SASL (unknown error) 2016-02-16 16:04:31,426 WARN org.apache.zookeeper.ClientCnxn: Session 0x152e783fe0d0001 for server null, unexpected error, closing socket connection and attempting reconnect java.net.ConnectException: Connection refused at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717) at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361) at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081) 2016-02-16 16:04:31,526 WARN org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper: Possibly transient ZooKeeper, quorum=localhost:61181, exception=org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /hbase/meta-region-server ... View more

I have a cluster that has been running pretty smoothly for over a month now that is rather large. I had just fixed an issue with a few DataNodes and was left with the web interface saying that 5 hosts were in maintenance mode when they were not. I tried turning mm on/off but it didn't help so I finally tried a sudo ambari-server restart Afterwards, I tried to login again and the web interface wouldn't load. Waited a few minutes, still nada. Looking at today's entries in /var/log/ambari-server/ambari-server.log had errors regarding the metric server but nothing that seemed relevant. The network settings are all the same and haven't changed, I am not sure what went wrong? Any ideas of what logs I should read or what I should try? EDIT: Thanks for the fast replies!! I have attached the info requested as files so this post doesn't extend down a mile. It looks like the ambari service is not listening on port 8080. EDIT2: I ended up rolling back the ambari server vm to an earlier checkpoint and luckily there weren't too many errors to deal with. I will update again if the issue comes back. ... View more

I am trying to test Hadoop using Ubuntu 15 and also wanted to use Ambari for the deployment. When I try to auto-install the agent in the initial server install wizard, it gets all the way to the end then fails saying "Unsupported OS." The agent appears to have installed correctly though, it just fails simply because the OS is identified as Ubuntu 15. One workaround I read was to modify the OS identifier on each host to read Ubuntu 14 instead of 15. Since the Ambari server is also running on Ubuntu 15 though, this generates a new error saying that the host is not in the same OS family as the server. Is there a file where I can add Ubuntu 15 to the list of supported OS's? Or can I disable this check? Or is this enabled because there is no chance Ambari will run on Ubuntu 15? ... View more