I have just installed CDH 5.4.2 on RHEL 6.6 on AWS EC2. Very simple setup - initially just 1 node with Core Hadoop services.
Installation was successful, no error messages.
When I logged into Cloudera Manager, it showed ALL services in a BAD health. Health issues are the following:
Under-Replicated Blocks, NameNode Health
YARN (MR2 Included)
Cloudera Management Services
Unexpected Exits, Web Server Status
Web Server Status, Unexpected Exits
Unexpected Exits, Process Status
I tried to:
- Restart Cloudera Management Service
- Reboot the Linux server
- Adjusted Clock Offset Threshold on Host to a very big value.
So far, nothing helped.
Therefore, I have 2 questions:
1. Is it a normal situation that Cloudera works so weird after successful setup or did I do anything wrong?
2. How to resolve these BAD health issues?
Will appreciate your help.
Thanks in advance.
I am in exactly same situation where Installation, health check was successful initially but went bad just in couple of days without my changing anything significantly.
I mostly get this Clock Offset error alterts almost daily for most all (definitely YARN and HDFS) services.
FYI installed 5.3.1 in RHEL 6.5 4 node cluster somewhere by Feb/March and don't know top of my head whether I installed/configured NTP service. Would NTP be recommended for 5.3 as well because I saw online doc that is for 5.4.
Could you please comment?