@Jessika314 ninja In addition to what @dgoodhand mentioned, also make sure of below points - 1. Hostname is correctly set using $hostname and 'hostname -f' command output. 2. Make sure you have correct entries for IPaddress and hostname in 'cat /etc/hosts' 3. Make sure iptables is disabled on all hosts in cluster - '$iptables -L' 4. Selinux must disabled. $sestatus ... View more

@Jessika314 ninja Stop both namenodes. If we are able to recall which was the active namenode last time then just start that namenode and let the other be down. Make sure ZKFC and JN's should be running when you do this activity. Once the namenode is started, check if its showing Active status in ambari UI. If YES, wait for namenode to come outof safemode. If the namenode doesnot show active please check the ZKFC and Namenode logs. Once the namenode is out of safe mode start the other namenode and check the status in Ambari UI. Let me know if that helps. ... View more

@jayachandra BABU The command should be use on cli. If you are not using cli then you might go for something like FTP server - https://sites.google.com/a/iponweb.net/hadoop/Home/hdfs-over-ftp If you want to continuously fetch data from remote system and dump in hadoop the you can also look for FLUME/Kafka. ... View more

++ @Kuldeep Kulkarni Can you help... ... View more

@Rainer Geissendoerfer Please check below steps to debug - 1. Check if HIVE service is up using "ps -aef |grep hive" command 2. Launch hive cli and try accessing tables. 3. Telnet <hive_host>:<port> from localhost 4. Check the database connection for hive. Seems like the checks are failing for HCAT service. ... View more

Hi @Allen Niu Can you attach the screenshot here of the screen on which you are struck. Also do check below - 1. Login on ambari server and change path to - $cd /var/lib/ambari-agent/data/ 2. $ ls -ltr output-* and $ ls -ltr error-* 3. Check the last output or error file to see if there are any useful logs. ... View more