[AMBARI-22966] ambari-agent fails to start

• Type: Task
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 2.6.2
• Fix Version/s: 2.6.2
• Component/s: ambari-agent
• Labels: pull-request-available
• Assignee: Dmytro Grinenko
• Reporter: Dmytro Grinenko
• Created: 12/Feb/18 18:41
• Updated: 13/Feb/18 09:34
• Resolved: 13/Feb/18 09:34

Description

ambari-agent start gives the following exception:

Traceback (most recent call last):
 File "/usr/lib/ambari-agent/lib/ambari_agent/main.py", line 92, in <module>
 import ProcessHelper
 File "/usr/lib/ambari-agent/lib/ambari_agent/ProcessHelper.py", line 25, in <module>
 from ambari_commons.shell import getTempFiles
 File "/usr/lib/ambari-agent/lib/ambari_commons/shell.py", line 30, in <module>
 from resource_management.core import sudo
 File "/usr/lib/ambari-agent/lib/resource_management/__init__.py", line 23, in <module>
 from resource_management.libraries import *
 File "/usr/lib/ambari-agent/lib/resource_management/libraries/__init__.py", line 23, in <module>
 from resource_management.libraries.functions import *
 File "/usr/lib/ambari-agent/lib/resource_management/libraries/functions/__init__.py", line 48, in <module>
 from resource_management.libraries.functions.log_process_information import *
 File "/usr/lib/ambari-agent/lib/resource_management/libraries/functions/log_process_information.py", line 22, in <module>
 from ambari_commons.shell import shellRunner
ImportError: cannot import name shellRunner

Most likely because of a circular dependency that was added by AMBARI-22888. Removing the sudo import from shell makes the problem go away.

sudo -> resource_management.libraries.* -> resource_management.libraries.functions.* -> esource_management.libraries.functions.log_process_information.* -> ambari_commons.shell.shellRunner -> resource_management.core.sudo

Issue Links

• is caused by: AMBARI-22888 Cancel operation during package deployment causing repository manager to be broken
• links to: GitHub Pull Request #330