[AMBARI-13835] After stack_upgrade 2.2 to 2.3 hook script fails due to missing /configurations/tez-site/tez.am.view-acls value

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.1.2
• Fix Version/s: 2.2.0
• Component/s: ambari-web
• Assignee: Andrii Tkach
• Reporter: Andrii Tkach
• Created: 11/Nov/15 15:20
• Updated: 11/Nov/15 19:35
• Resolved: 11/Nov/15 15:42

Description

After upgrading to 2.1.x hook script fails due to missing /configurations/tez-site/tez.am.view-acls value. The following errors may be seen when executing agent-side scripts (start, stop, etc...):

File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/config_dictionary.py", line 81, in __getattr__ 
raise Fail("Configuration parameter '" + self.name + "' was not found in configurations dictionary!") 
resource_management.core.exceptions.Fail: Configuration parameter 'tez.am.view-acls' was not found in configurations dictionary! 

Error: Error: Unable to run the custom hook script ['/usr/bin/python2.7', '/var/lib/ambari-agent/cache/stacks/HDP/2.0.6/hooks/before-ANY/scripts/hook.py', 'ANY', '/var/lib/ambari-agent/data/command-8752.json', '/var/lib/ambari-agent/cache/stacks/HDP/2.0.6/hooks/before-ANY', '/var/lib/ambari-agent/data/structured-out-8752.json', 'INFO', '/var/lib/ambari-agent/tmp’] 

Cause
It appears that the cause is from this line:

stacks/HDP/2.0.6/hooks/before-ANY/scripts/params.py:220

tez_am_view_acls = config['configurations']['tez-site']["tez.am.view-acls"]

Since /configurations/tez-site/tez.am.view-acls was not set, the python script failed.

Solution
Either protect this call using something like

default("/configurations/tez-site/tez.am.view-acls", "*")

Or ensure the value is set during the upgrade process when transitioning to Ambari 2.1.0.