Support Questions

Find answers, ask questions, and share your expertise
Announcements
Celebrating as our community reaches 100,000 members! Thank you!

abari-agent is failing to connect ambari-server?

avatar
Super Collaborator

Hi Community team,

Amabari-agent is failing to connect Aambari-server

In agent logs :

INFO 2017-10-16 05:50:56,334 PingPortListener.py:50 - Ping port listener started on port: 8670 INFO 2017-10-16 05:50:56,407 main.py:287 - Connecting to Ambari server at https://bdlambtst01.isus.emc.com:8440 (10.146.9.185) INFO 2017-10-16 05:50:56,407 main.py:287 - Connecting to Ambari server at https://bdlambtst01.isus.emc.com:8440 (10.146.9.185) INFO 2017-10-16 05:50:56,407 NetUtil.py:59 - Connecting to https://bdlambtst01.isus.emc.com:8440/ca

in /var/log/messages:

Oct 16 05:49:09 bdlhdctst04 python: detected unhandled Python exception in '/usr/lib/python2.6/site-packages/ambari_agent/main.py' Oct 16 05:50:01 bdlhdctst04 systemd: Started Session 4823 of user root. Oct 16 05:50:01 bdlhdctst04 systemd: Starting Session 4823 of user root. Oct 16 05:50:56 bdlhdctst04 python2.7: detected unhandled Python exception in '/usr/lib/python2.6/site-packages/ambari_agent/main.py'

i have verified the network connectivity is good agent --> server & server --> agent?

i have observed that there are no files are present in /var/lib/ambari-agent/data location?

Any help would be appreciate this situation?

Regards,

Subhash.

1 ACCEPTED SOLUTION

avatar
Master Mentor

@subhash parise

On the offending node, do the following, bizzare thee are no files in /var/lib/ambari-agent/data:

Stop and remove ambari-agent

ambari-agent stop 
yum erase ambari-agent 
rm -rf /var/lib/ambari-agent
rm -rf /var/run/ambari-agent
rm -rf /usr/lib/amrbari-agent
rm -rf /etc/ambari-agent
rm -rf /var/log/ambari-agent
rm -rf /usr/lib/python2.6/site-packages/ambari* 

Re-install the Ambari Agent

yum install ambari-agent
vi /etc/ambari-agent/conf/ambari-agent.ini 

Change hostname to Ambari Server

[server]
hostname={Ambari-server_host_FQDN}
url_port=8440
secured_url_port=8441
connect_retry_delay=10
max_reconnect_retry_delay=30 

Restart the agent ambari-agent start

That should resolve the issue

View solution in original post

3 REPLIES 3

avatar
Master Mentor

@subhash parise

Your Ambari is SSL enabled did you by chance also enable 2 ways SSL between Ambari Server and Ambari Agents? see doc

Here is a HCC document that can also help you achieve that.

Enable 2 way SSL between Ambari-Server and Ambari-agents in Ambari 2.5

Hope that helps

avatar
Super Collaborator

Hi Geo,

all the other nodes are working fine except this node and we didn't change any thing from ambari side.

avatar
Master Mentor

@subhash parise

On the offending node, do the following, bizzare thee are no files in /var/lib/ambari-agent/data:

Stop and remove ambari-agent

ambari-agent stop 
yum erase ambari-agent 
rm -rf /var/lib/ambari-agent
rm -rf /var/run/ambari-agent
rm -rf /usr/lib/amrbari-agent
rm -rf /etc/ambari-agent
rm -rf /var/log/ambari-agent
rm -rf /usr/lib/python2.6/site-packages/ambari* 

Re-install the Ambari Agent

yum install ambari-agent
vi /etc/ambari-agent/conf/ambari-agent.ini 

Change hostname to Ambari Server

[server]
hostname={Ambari-server_host_FQDN}
url_port=8440
secured_url_port=8441
connect_retry_delay=10
max_reconnect_retry_delay=30 

Restart the agent ambari-agent start

That should resolve the issue