Most services fail to start after Ambari setup completes(with warnings)

[#1]

After complete HDP 2.5 install with Ambai, I am unable to start many services. They fail.

App Timeline Server Start - stderr:

Traceback (most recent call last):
  File "/var/lib/ambari-agent/cache/common-services/YARN/2.1.0.2.0/package/scripts/application_timeline_server.py", line 155, in <module>
    ApplicationTimelineServer().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/YARN/2.1.0.2.0/package/scripts/application_timeline_server.py", line 44, in start
    self.configure(env) # FOR SECURITY
  File "/var/lib/ambari-agent/cache/common-services/YARN/2.1.0.2.0/package/scripts/application_timeline_server.py", line 55, in configure
    yarn(name='apptimelineserver')
  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/YARN/2.1.0.2.0/package/scripts/yarn.py", line 337, in yarn
    mode=0755
  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/libraries/providers/hdfs_resource.py", line 459, in action_create_on_execute
    self.action_delayed("create")
  File "/usr/lib/python2.6/site-packages/resource_management/libraries/providers/hdfs_resource.py", line 456, in action_delayed
    self.get_hdfs_resource_executor().action_delayed(action_name, self)
  File "/usr/lib/python2.6/site-packages/resource_management/libraries/providers/hdfs_resource.py", line 247, in action_delayed
    self._assert_valid()
  File "/usr/lib/python2.6/site-packages/resource_management/libraries/providers/hdfs_resource.py", line 231, in _assert_valid
    self.target_status = self._get_file_status(target)
  File "/usr/lib/python2.6/site-packages/resource_management/libraries/providers/hdfs_resource.py", line 292, in _get_file_status
    list_status = self.util.run_command(target, 'GETFILESTATUS', method='GET', ignore_status_codes=['404'], assertable_result=False)
  File "/usr/lib/python2.6/site-packages/resource_management/libraries/providers/hdfs_resource.py", line 179, in run_command
    _, out, err = get_user_call_output(cmd, user=self.run_user, logoutput=self.logoutput, quiet=False)
  File "/usr/lib/python2.6/site-packages/resource_management/libraries/functions/get_user_call_output.py", line 61, in get_user_call_output
    raise Fail(err_msg)
resource_management.core.exceptions.Fail: Execution of 'curl -sS -L -w '%{http_code}' -X GET 'http://sgscaiu0376.in623.corpintra.net:50070/webhdfs/v1/ats/done?op=GETFILESTATUS&user.name=hdfs' 1>/tmp/tmpyehBKW 2>/tmp/tmp1opf2_' returned 7. curl: (7) Failed to connect to sgscaiu0376.in623.corpintra.net port 50070: Connection refused
000

Could somebody tell me what could be the possible issue?

OS: Ubuntu14.04

HDP: 2.5

Ambari: 2.4.1.0

[#2]

@Anirudh K

Seems the namenode is not connecting/responding on port 50070. Can you check using $netstat -an |grep 50070 if you are able to see the port.

Also try to start yarn service. Paste if you are able to see any error.

[#3]

Yes, that was the problem.

[#4 · Accepted solution]

It was Namenode connectivity issue. The hosts file on the namenode had to be fixed.

The first line should be `127.0.0.1 localhost`

In my hosts file it was `127.0.0.1 hostname1 localhost`

I removed the `hostname1` and it was fixed.