Error while Installing hosts

Currently I’m using Scientific Linux6 what should be a modified RHEL6.
When I’m doing the web based install, after the second step, my nodes are installed but not registered.
I can see 2 things in the log file:
22:14:14,113 WARN HeartBeatHandler:331 – Received registration request from host with non matching os type, hostname=master, serverOsType=redhat6, agentOstype=scientific6
( This is funny, because ALL my servers, also the ambari server are the same scientific6 images)

But the real problem is maybe this:
22:36:36,982 WARN nio:651 – javax.net.ssl.SSLException: Received fatal alert: unknown_ca
22:36:44,687 WARN nio:651 – javax.net.ssl.SSLHandshakeException: null cert chain
22:36:45,034 WARN nio:651 – javax.net.ssl.SSLProtocolException: handshake alert: no_certificate

All my servers hase the same hosts file, with fix IP-name pairs. Ping works for everywhere. Also password-less ssh with root.

Topic

[Larry LiuModerator]

Hi, Adam and Alex

I can propose a workaround:

1. remove any release information under /etc. The file should be like /etc/scientific-release. I am not quite sure.
2. Create the following 2 files:

/etc/redhat-release
/etc/issue

You can copy the content from a redhat version. In my centos 6.0, I have the following content:
[root@sandbox ~]# cat /etc/redhat-release
CentOS release 6.3 (Final)
[root@sandbox ~]# cat /etc/issue
CentOS release 6.3 (Final)
Kernel \r on an \m

Please let me know if it works.

Thanks
Larry

[Alexandru SicoeMember]

Hello,
Is there any resolution to this thread? Is there a way to install HDP on SLC6? I got the same problem connecting the Ambari agent and server. I saw the Jira issue for unsupported OS is not resolved.

Cheers,
Alex

INFO 2013-04-30 20:10:17,201 security.py:49 – SSL Connect being called.. connecting to the server
INFO 2013-04-30 20:10:17,398 Controller.py:103 – Unable to connect to: https://pc-atd-cc-01.cern.ch:8441/agent/v1/register/pc-atd-cc-01.cern.ch
Traceback (most recent call last):
File “/usr/lib/python2.6/site-packages/ambari_agent/Controller.py”, line 89, in registerWithServer
ret = json.loads(response)
File “/usr/lib64/python2.6/json/__init__.py”, line 307, in loads
return _default_decoder.decode(s)
File “/usr/lib64/python2.6/json/decoder.py”, line 319, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File “/usr/lib64/python2.6/json/decoder.py”, line 338, in raw_decode
raise ValueError(“No JSON object could be decoded”)
ValueError: No JSON object could be decoded

[Jeff SposettiMember]

I think since your agent is return “agentOstype=scientific6″, and that is an unsupported OS, that’s why your agent registration is failing.

I filed this JIRA for making this logging more informative / less cryptic. If you would like to see supported added for Scientific Linux6, please file a JIRA improvement as well.

https://issues.apache.org/jira/browse/AMBARI-1605

[Adam OcsvariMember]

Hi Ted!

I double checked everything:
hostname -f correct in every servers.
SeLinux and IP tables are off everywhere.

Any other idea?

Adam

[tedrMember]

Hi Adam,

What do you get on the hosts when you type "hostname -f". This is what you should enter as the hosts to install to. Also please check that iptables or firewall and selinux are turned off/disabled.

Thanks,
Ted.

[Adam OcsvariMember]

FQDN: All my servers has a hostname-IP matching in the hosts file. ( all file contains all the servers)
Hostnames: ambari, master, slave
I did the servers stop,reset,start.. still the same.

My first message contains all the non-INFO part of the log.
Here is what the ui displays as log:

Registration log for master
STDOUT

STDERR
STDOUT

STDERR
STDOUT
Verifying Python version compatibility…
Using python /usr/bin/python2.6
Checking for previously running Ambari Agent…
ERROR: ambari-agent already running
Check /var/run/ambari-agent/ambari-agent.pid for PID.
(‘hostname: ok slave
ip: ok 10.9.2.193
cpu: ok QEMU Virtual CPU version 1.0
memory: ok 0.97353 GB
disks: ok
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_sclinux-lv_root
27G 1021M 25G 4% /
tmpfs 499M 0 499M 0% /dev/shm
/dev/vda1 485M 52M 408M 12% /boot
IGLZSB@store.cloud.ik.bme.hu:home
193G 2.0G 181G 2% /home/cloud/sshfs
os: ok Scientific Linux release 6.3 (Carbon)
iptables: ok
Chain INPUT (policy ACCEPT 4635 packets, 16M bytes)
pkts bytes target prot opt in out source destination

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination

Chain OUTPUT (policy ACCEPT 5407 packets, 833K bytes)
pkts bytes target prot opt in out source destination
selinux: ok SELINUX=disabled
SELINUXTYPE=targeted
yum: ok yum-3.2.29-30.el6.noarch
rpm: ok rpm-4.8.0-27.el6.x86_64
openssl: ok openssl-1.0.0-27.el6_4.2.x86_64
curl: ok curl-7.19.7-26.el6_2.4.x86_64
wget: ok wget-1.12-1.4.el6.x86_64
net-snmp: UNAVAILABLE
net-snmp-utils: UNAVAILABLE
ntpd: UNAVAILABLE
ruby: UNAVAILABLE
puppet: UNAVAILABLE
nagios: UNAVAILABLE
ganglia: UNAVAILABLE
passenger: UNAVAILABLE
hadoop: UNAVAILABLE
yum_repos: ok
HDP-UTILS-1.1.0.15 Hortonworks Data Platform Utils Version – HDP-UTILS-1. 52
zypper_repos: UNAVAILABLE
‘, None)
(‘ File “/usr/lib64/python2.6/socket.py”, line 567, in create_connection
raise error, msg
error: [Errno 111] Connection refused

[....]

INFO 2013-03-08 08:42:45,442 security.py:49 – SSL Connect being called.. connecting to the server
INFO 2013-03-08 08:42:45,444 Controller.py:103 – Unable to connect to: https://ambari:8441/agent/v1/register/slave
Traceback (most recent call last):
File “/usr/lib/python2.6/site-packages/ambari_agent/Controller.py”, line 88, in registerWithServer
response = self.sendRequest(self.registerUrl, data)
File “/usr/lib/python2.6/site-packages/ambari_agent/Controller.py”, line 239, in sendRequest

[abdelrahman shettiaMember]

Hi Adam ,

I will be happy to help resolve out this issue. Please use FQDN in the Ambari installation process. Ambari server may need to be reset by running the following commands.
ambari-server stop
ambari-server reset
ambari-server start

Once the Ambari server up , please try to reregister again. If the problem persists take a copy of the error messages and past it here. Hope this helps.

Thanks
-Abdelrhman

[Author]

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