[ https://issues.apache.org/jira/browse/AMBARI-19646?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
kevin.chen reassigned AMBARI-19646: ----------------------------------- Assignee: kevin.chen > AMBARI Java services do not resolve localhost FQDN properly in some cases > ------------------------------------------------------------------------- > > Key: AMBARI-19646 > URL: https://issues.apache.org/jira/browse/AMBARI-19646 > Project: Ambari > Issue Type: Bug > Components: ambari-server > Affects Versions: 2.4.2 > Environment: Ubuntu 14 LTS > HDP 2.5.3.0-37 > Reporter: Piotr Tylenda > Assignee: kevin.chen > Priority: Minor > > When installing hive client I have noticed the following problem in the logs: > {code} > Traceback (most recent call last): > File > "/var/lib/ambari-agent/cache/common-services/HIVE/0.12.0.2.0/package/scripts/hive_client.py", > line 68, in <module> > HiveClient().execute() > File > "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py", > line 280, in execute > method(env) > File > "/var/lib/ambari-agent/cache/common-services/HIVE/0.12.0.2.0/package/scripts/hive_client.py", > line 35, in install > self.configure(env) > File > "/var/lib/ambari-agent/cache/common-services/HIVE/0.12.0.2.0/package/scripts/hive_client.py", > line 43, in configure > hive(name='client') > File "/usr/lib/python2.6/site-packages/ambari_commons/os_family_impl.py", > line 89, in thunk > return fn(*args, **kwargs) > File > "/var/lib/ambari-agent/cache/common-services/HIVE/0.12.0.2.0/package/scripts/hive.py", > line 282, in hive > mode = 0644, > File "/usr/lib/python2.6/site-packages/resource_management/core/base.py", > line 155, in __init__ > self.env.run() > File > "/usr/lib/python2.6/site-packages/resource_management/core/environment.py", > line 160, in run > self.run_action(resource, action) > File > "/usr/lib/python2.6/site-packages/resource_management/core/environment.py", > line 124, in run_action > provider_action() > File > "/usr/lib/python2.6/site-packages/resource_management/core/providers/system.py", > line 123, in action_create > content = self._get_content() > File > "/usr/lib/python2.6/site-packages/resource_management/core/providers/system.py", > line 160, in _get_content > return content() > File "/usr/lib/python2.6/site-packages/resource_management/core/source.py", > line 51, in __call__ > return self.get_content() > File "/usr/lib/python2.6/site-packages/resource_management/core/source.py", > line 193, in get_content > web_file = opener.open(req) > File "/usr/lib/python2.7/urllib2.py", line 404, in open > response = self._open(req, data) > File "/usr/lib/python2.7/urllib2.py", line 422, in _open > '_open', req) > File "/usr/lib/python2.7/urllib2.py", line 382, in _call_chain > result = func(*args) > File "/usr/lib/python2.7/urllib2.py", line 1214, in http_open > return self.do_open(httplib.HTTPConnection, req) > File "/usr/lib/python2.7/urllib2.py", line 1184, in do_open > raise URLError(err) > urllib2.URLError: <urlopen error [Errno 111] Connection refused> > {code} > Which was caused by: > {code} > 2017-01-19 16:00:55,016 - > File['/usr/lib/ambari-agent/DBConnectionVerification.jar'] {'content': > DownloadSource('http://localhost:8080/resources/DBConnectionVerification.jar'), > 'mode': 0644} > {code} > I have searched through the python files and have found that jdk_location in > ambari properties is set to "http://localhost:8080/resources". > This property is resolved in this file > https://github.com/apache/ambari/blob/ddcc13b40902f7fc9144bcaa2af5b54d85442dfa/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariManagementControllerImpl.java > After that I have tested how this java code behaves on the ambari server > machine: > {code} > InetAddress.getLocalHost().getCanonicalHostName(); > {code} > The result is "localhost" (not as expected) > For command > {code} > hostname -f > {code} > returns "some-ambari-server.org" (as expected) > Python code > {code} > python -c 'import socket; print(socket.getfqdn())' > {code} > returns "some-ambari-server.org" (as expected) > It seems that such entry in /etc/hosts > {code} > 127.0.0.1 localhost some-ambari-server.org > {code} > causes this situation and changing this to > {code} > 127.0.0.1 some-ambari-server.org localhost > {code} > fixed the issue. > I am not sure if it is actually something that should be fixed in code or > mentioned in docs - it makes the ambari environment partially stable, apart > from the parts which require jdk_location property. -- This message was sent by Atlassian JIRA (v6.3.15#6346)