While starting the History Server from Ambari,from master(namenode),getting { "RemoteException": { "exception": "IOException", "javaClassName": "java.io.IOException", "message": "Failed to find datanode, suggest to check cluster health." } } ... View more

I have the HDP 2.4 setup..Since there is no builtin cassandra service,I have added cassandra to my cluster from the following link.. https://github.com/Symantec/ambari-cassandra-service..Installation results in a warning in one of my host,but the rest all were successful.But I am unable to start my cqlsh shell now..Its showing Connection error: ('Unable to connect to any servers', {'localhost': error(111, "Tried connecting to [('127.0.0.1', 9042)]...Also noticed some critical errors in ambari Connection failed: [Errno 111] Connection refused to node1.domain:7000. ... View more

I upgraded hdp 2.4 to 2.5..now i am unable to start hive shell from the terminal..when I type hive from the terminal it results in Exception in thread "main" java.lang.RuntimeException: org.apache.hadoop.security.AccessControlException: Permission denied: user=master, access=WRITE, inode="/user/master":hdfs:hdfs:drwxr-xr-x"..where "master" is my name node name..Even when I type hive -version also ends up in the same error.. ... View more

hadoop-hdfs-datanode-masterdomain.txt Ambari is not starting up the applications..It will go smoothly up to 64 % and results in errors.. ... View more

By default my zookeeper.znode.parent value which comes under hbase-site.xml is /hbase/unsecure and with these values Hbase application ends up in errors when we start the ambari applications.But I tried changing the value from /hbase/unsecure to /hbase which eliminated the errors all of a sudden..But now I am facing the Can't get locations/connection exception error when I am trying to access Hbase from a client through java.Any help would be thankful. ... View more