I am using phoenix to create a table in hbase and insert some rows. If the insert is successful, i dont see any message on the console. But if i do see some error, i do see the error in the console. I just want to know where should i look for the logs so that i can check whether any operation through phoenix is failure or success. Is there any place where i could look for phoenix logs. I am usign HDP 2.4 ... View more

I want to take my hbase table backup and store it in S3. Which jar file should i use to do that? I am using HDP 2.4 and i dont see hbase.jar hadoop jar hbase.jar emr.hbase.backup.Main --restore --backup-dir s3://your-bucket/backup-hbase/j-XXXX' ... View more

Why spark dataframes are faster in scala/python. the same is not the case with RDD's. RDD's created in scala are faster than the one in python. ... View more

I have raised this question earlier too. But still couldnt solve this issue. Any help would be great. Upgraded ambari from 2.1 to 2.2 and after that if i try to enable kerberos, i do see the error "KDC host unreachable". But in an environment where ambari still 2.1, i dont see this error. Is this a bug in ambari for this upgrade? Log messages are not clear 19 Apr 2016 05:56:16,683 WARN [qtp-ambari-client-29] KdcServerConnectionVerification:187 - An unexpected exception occurred while attempting to communicate with the KDC server at over TCP 19 Apr 2016 05:56:16,685 WARN [qtp-ambari-client-29] KdcServerConnectionVerification:187 - An unexpected exception occurred while attempting to communicate with the KDC server at over UDP 19 Apr 2016 05:56:16,685 ERROR [qtp-ambari-client-29] KdcServerConnectionVerification:113 - Failed to connect to the KDC at using either TCP or UDP p.s : i have just deleted the hostname in the above logs for the sake of anonymity ... View more

I am planning to install Hbase on my cluster along with phoenix through Ambari. In the add service section (slaves and clients), i do see an option of Phoenix query server. By default it is not enabled. Should i install this component mandatorily or just a phoenix client is enough. If i need to install it mandatorily, where should i install this component ( which all nodes). ... View more

Can anyone throw some light on the hbase table design. which one should one use "tall-narrow or flat wide design" and for which use case. ... View more