many alert after add new host from ambari

[#1]

hi:

After add one host, i have this alerts, from the new host, any suggestion what is the problem??

Connection failed to http://a01hop07:8042/ws/v1/node/info (Traceback (most recent call last): File "/var/lib/ambari-agent/cache/common-services/YARN/2.1.0.2.0/package/alerts/alert_nodemanager_health.py", line 165, in execute url_response = urllib2.urlopen(query, timeout=connection_timeout) File "/usr/lib64/python2.7/urllib2.py", line 154, in urlopen return opener.open(url, data, timeout) File "/usr/lib64/python2.7/urllib2.py", line 431, in open response = self._open(req, data) File "/usr/lib64/python2.7/urllib2.py", line 449, in _open '_open', req) File "/usr/lib64/python2.7/urllib2.py", line 409, in _call_chain result = func(*args) File "/usr/lib64/python2.7/urllib2.py", line 1244, in http_open return self.do_open(httplib.HTTPConnection, req) File "/usr/lib64/python2.7/urllib2.py", line 1214, in do_open raise URLError(err) URLError: <urlopen error [Errno 113] No route to host> )

This host-level alert is triggered if the DataNode Web UI is unreachable.

This alert is triggered if the number of down NodeManagers in the cluster is greater than the configured critical threshold. It aggregates the results of NodeManager process checks.

Connection failed to http://a01hop07:50075 (<urlopen error [Errno 113] No route to host>)

[#2]

When you add a new host to a cluster the services running on that host are not automatically started (but they are installed). You will need to startup the services on that new host for the alerts to go away.

[#3 · Accepted solution]

Hi:

The /etc/hosts had a wrong ip, now is working