Hi, I am a beginner in HDP and Ambari. Recently, i have installed HDP 2.4 in my cent os 7 VM ( single node with 5 gb ram). Installation went fine. After installation, when I tried to start hdfs service from UI ( automated start got failed), I got below error: ################ resource_management.core.exceptions.Fail: Execution of 'ambari-sudo.sh su hdfs -l -s /bin/bash -c 'ulimit -c unlimited ; /usr/hdp/current/hadoop-client/sbin/hadoop-daemon.sh --config /usr/hdp/current/hadoop-client/conf start namenode'' returned 1. /usr/hdp/current/hadoop-client/sbin/hadoop-daemon.sh: line 76: [: centos-node2.com: integer expression expected starting namenode, logging to /var/log/hadoop/hdfs/hadoop-hdfs-namenode-192.168.2.15 Error: Could not find or load main class centos-node2.com ##################### Not sure how to fix this issue (:. If anyone can please help!!!!! some more info: ################ [root@192 sbin]# hadoop classpath /usr/hdp/2.4.0.0-169/hadoop/conf:/usr/hdp/2.4.0.0-169/hadoop/lib/*:/usr/hdp/2.4.0.0-169/hadoop/.//*:/usr/hdp/2.4.0.0-169/hadoop-hdfs/./:/usr/hdp/2.4.0.0-169/hadoop-hdfs/lib/*:/usr/hdp/2.4.0.0-169/hadoop-hdfs/.//*:/usr/hdp/2.4.0.0-169/hadoop-yarn/lib/*:/usr/hdp/2.4.0.0-169/hadoop-yarn/.//*:/usr/hdp/2.4.0.0-169/hadoop-mapreduce/lib/*:/usr/hdp/2.4.0.0-169/hadoop-mapreduce/.//*:/bin:/usr/java/jdk1.8.0_51/bin:/usr/lib64/qt-3.3/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/usr/java/jdk1.8.0_51/bin:/root/bin:mysql-connector-java.jar:postgresql-jdbc2ee.jar:postgresql-jdbc2.jar:postgresql-jdbc3.jar:postgresql-jdbc.jar:/usr/hdp/2.4.0.0-169/tez/*:/usr/hdp/2.4.0.0-169/tez/lib/*:/usr/hdp/2.4.0.0-169/tez/conf ################################## /var/lib/ambari-agent/data/errors-257.txt : Traceback (most recent call last): File "/var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/namenode.py", line 401, in NameNode().execute() File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py", line 219, in execute method(env) File "/var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/namenode.py", line 102, in start namenode(action="start", hdfs_binary=hdfs_binary, upgrade_type=upgrade_type, env=env) File "/usr/lib/python2.6/site-packages/ambari_commons/os_family_impl.py", line 89, in thunk return fn(*args, **kwargs) File "/var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/hdfs_namenode.py", line 146, in namenode create_log_dir=True File "/var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/utils.py", line 267, in service Execute(daemon_cmd, not_if=process_id_exists_command, environment=hadoop_env_exports) File "/usr/lib/python2.6/site-packages/resource_management/core/base.py", line 154, in __init__ self.env.run() File "/usr/lib/python2.6/site-packages/resource_management/core/environment.py", line 158, in run self.run_action(resource, action) File "/usr/lib/python2.6/site-packages/resource_management/core/environment.py", line 121, in run_action provider_action() File "/usr/lib/python2.6/site-packages/resource_management/core/providers/system.py", line 238, in action_run tries=self.resource.tries, try_sleep=self.resource.try_sleep) File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 70, in inner result = function(command, **kwargs) File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 92, in checked_call tries=tries, try_sleep=try_sleep) File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 140, in _call_wrapper result = _call(command, **kwargs_copy) File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 291, in _call raise Fail(err_msg) resource_management.core.exceptions.Fail: Execution of 'ambari-sudo.sh su hdfs -l -s /bin/bash -c 'ulimit -c unlimited ; /usr/hdp/current/hadoop-client/sbin/hadoop- daemon.sh --config /usr/hdp/current/hadoop-client/conf start namenode'' returned 1. /usr/hdp/current/hadoop-client/sbin/hadoop-daemon.sh: line 76: [: centos-node2.com: integer expression expected starting namenode, logging to /var/log/hadoop/hdfs/hadoop-hdfs-namenode-192.168.2.15 Error: Could not find or load main class centos-node2.com Thanks, Subhadeep ... View more