when we start the data node on one of the workers machine we get: ERROR datanode.DataNode (DataNode.java:secureMain(2691)) - Exception in secureMain org.apache.hadoop.util.DiskChecker$DiskErrorException: Too many failed volumes - current valid volumes: 4, volumes configured: 5, volumes failed: 1, volume failures tolerated: 0 and this WARN checker.StorageLocationChecker (StorageLocationChecker.java:check(208)) - Exception checking StorageLocation [DISK]file:/grid/sdc/hadoop/hdfs/data/ org.apache.hadoop.util.DiskChecker$DiskErrorException: Directory is not writable: /xxxx/sdc/hadoop/hdfs/data what are the steps that needs to fix it? ... View more

in ambari GUI we want to add the graphite service so we select actions --> add service --> check the box of graphite --> assign masters --> assign slaves and masters but when click next to the next screen "assign slaves and masters" this screen stay only 2 second and then we get the customize services ( so we cant check the boxes in the screen of assign slaves and masters because its disappeared after 2 seconds , why this happened ? ... View more

from some unclear reason when we start the ambari agent on master machine its failed from the log we can see that: ERROR 2017-10-02 11:58:42,597 script_alert.py:123 - [Alert][hive_server_process] Failed with result CRITICAL: ['Connection failed on host machine-master01.pop.com:10000 (Traceback (most recent call last):\n File "/var/lib/ambari-agent/cache/common-services/HIVE/0.12.0.2.0/package/alerts/alert_hive_thrift_port.py", line 211, in execute\n ldap_password=ldap_password)\n File "/usr/lib/python2.6/site-packages/resource_management/libraries/functions/hive_check.py", line 79, in check_thrift_port_sasl\n timeout=check_command_timeout)\n File "/usr/lib/python2.6/site-packages/resource_management/core/base.py", line 155, in __init__\n self.env.run()\n File "/usr/lib/python2.6/site-packages/resource_management/core/environment.py", line 160, in run\n what cause this problem? ... View more

we try to start the hive server on master01 machine as the following: [root@master01 hive]# su hive [hive@master01 hive]$ /usr/bin/hive --service hiveserver2 but hive command not print anything and hive server still stop what are the option to check why hive not start? ... View more