Here is the solution... 1. Services - Hive, HBase, HDFS, Oozie, YARN, MapReduce, Ambari Metrics These Services we can directly change the file limit from Ambari UI. Ambari UI > ServiceConfigs> <username of the service>_user_nofile_limit
Example: 1. Ambari UI -> HIVE -> Configs -> Advanced -> Advanced hive-env -> hive_user_nofile_limit 64000
2. Ambari UI > Ambari Metrics > configs > Advanced ams-hbase-env > max_open_files_limit 64000
3. Ambari UI > Yarn > configs > Advanced yarn-env > yarn_user_nofile_limit 64000
4. Ambari UI > MAPREDUCE2 > configs > Advanced mapred-env > mapred_user_nofile_limit 64000 2. Services - Zookeeper, Spark, WebHCat, Ranger . Users - zookeeper, Spark, hcat, ranger For users spark, hcat, zookeeper, ranger. Add the below lines for their respective nodes in /etc/security/limits.conf /etc/security/limits.conf file should have below entries. zookeeper - nofile 64000
spark - nofile 64000
hcat - nofile 64000
ranger - nofile 64000 After save the changes. Login as spark/hcat/zookeeper user and execute ulimit -a command. check the output. The output should contain value as open files (-n) 64000 Please find the below ulimit -a output . [spark@node01]$ ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 513179
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 64000
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 64000
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited If you still see ulimit -a values not updated. Then please add the below lines to file /etc/pam.d/su . vim /etc/pam.d/su
session required pam_limits.so Repeat the above process... It will be successful.
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