Cloudera Host Installation failure: Failed to detect Cloudera Manager Server - hadoop

Question

I'm trying to put a host on a hadoop cluster using the Cloudera Manager.
The two computers I am using for this are the following:
10.10.10.9 is supposed to be a DataNode and my first host
10.10.10.10 has the Cloudera Manager and will be the NameNode
The manager is having trouble with the "Cluster Installation" part of the "Add Hosts to the Cluster" scenario on the GUI.
I get the following error when the manager tries to detect the Cloudera Manager Server:
BEGIN host -t PTR 10.10.10.10
10.10.10.10.in-addr.arpa domain name pointer stardestroyer.riis.local.
END (0)
using stardestroyer.riis.local as scm server hostname
BEGIN which python
/usr/bin/python
END (0)
BEGIN python -c 'import socket; import sys; s = socket.socket(socket.AF_INET); s.settimeout(5.0); s.connect((sys.argv[1], int(sys.argv[2]))); s.close();' stardestroyer.riis.local 7182
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/usr/lib/python2.7/socket.py", line 224, in meth
return getattr(self._sock,name)(*args)
socket.gaierror: [Errno -2] Name or service not known
END (1)
could not contact scm server at stardestroyer.riis.local:7182, giving up
waiting for rollback request
I tried to do as Cheloute instructs in the following link, but it didn't seem to fix my issue. I also had a different error than the poster.
Cloudera Manager. Failed to detect Cloudera Manager Server
If the following is used on the commandline, there's no error.
python -c 'import socket; import sys; s = socket.socket(socket.AF_INET); s.settimeout(5.0); s.connect((sys.argv[1], int(sys.argv[2]))); s.close();' 10.10.10.10 7182
I'm not really sure how to fix this in the Cloudera Manager, though.

Answer 1

I found that I could have my system administrator delete my reverse DNS entry and the manager ended up working. I don't know if there is a better solution (there likely is), but this is the one I came up with.