[AMBARI-21173] Not able to start Yarn services after restoring the configs to initial value

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.0.0
• Component/s: ambari-server
• Assignee: Vitaly Brodetskyi
• Reporter: Sumana Sathish
• Created: 01/Jun/17 21:48
• Updated: 08/Sep/17 16:17
• Resolved: 21/Aug/17 20:58

Description

Change Yarn-site.xml to some custom configs and restart Yarn
Restore it back to the origin config; Restart fails

Traceback (most recent call last):
  File "/var/lib/ambari-agent/cache/common-services/YARN/3.0.0.3.0/package/scripts/nodemanager.py", line 106, in <module>
    Nodemanager().execute()
  File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py", line 330, in execute
    method(env)
  File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py", line 835, in restart
    self.stop(env, upgrade_type=upgrade_type)
  File "/var/lib/ambari-agent/cache/common-services/YARN/3.0.0.3.0/package/scripts/nodemanager.py", line 45, in stop
    import params
  File "/var/lib/ambari-agent/cache/common-services/YARN/3.0.0.3.0/package/scripts/params.py", line 29, in <module>
    from params_linux import *
  File "/var/lib/ambari-agent/cache/common-services/YARN/3.0.0.3.0/package/scripts/params_linux.py", line 39, in <module>
    import status_params
  File "/var/lib/ambari-agent/cache/common-services/YARN/3.0.0.3.0/package/scripts/status_params.py", line 46, in <module>
    yarn_pid_dir = format("{yarn_pid_dir_prefix}/{yarn_user}")
  File "/usr/lib/python2.6/site-packages/resource_management/libraries/functions/format.py", line 95, in format
    return ConfigurationFormatter().format(format_string, args, **result)
  File "/usr/lib/python2.6/site-packages/resource_management/libraries/functions/format.py", line 59, in format
    result_protected = self.vformat(format_string, args, all_params)
  File "/usr/lib64/python2.7/string.py", line 549, in vformat
    result = self._vformat(format_string, args, kwargs, used_args, 2)
  File "/usr/lib64/python2.7/string.py", line 582, in _vformat
    result.append(self.format_field(obj, format_spec))
  File "/usr/lib64/python2.7/string.py", line 599, in format_field
    return format(value, format_spec)
  File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/config_dictionary.py", line 73, in __getattr__
    raise Fail("Configuration parameter '" + self.name + "' was not found in configurations dictionary!")
resource_management.core.exceptions.Fail: Configuration parameter 'yarn-env' was not found in configurations dictionary!

Issue Links

• links to: review request