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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.
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