You're probably running into https://issues.apache.org/jira/browse/AMBARI-15617
Check to make sure that /var/lib/ambari-agent/tmp does not have "ambari_commons" as a directory/symlink inside of it. If it does, you should remove it. It's probably adding an older version of the common library to your python path. On Mar 30, 2016, at 9:43 PM, li liren <[email protected]<mailto:[email protected]>> wrote: Hi, Alejandro I use ambari-2.2.1 Thanks, liren On Thu, Mar 31, 2016, 2:06 AM Alejandro Fernandez <[email protected]<mailto:[email protected]>> wrote: Which version of Ambari are you on? I suspect it's because you have to remove from resource_management.libraries.functions import * And then start importing modules by name. Thanks,Alejandro From: li liren <[email protected]<mailto:[email protected]>> Reply-To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Date: Wednesday, March 30, 2016 at 1:45 AM To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: Failed on: Pre Upgrade HDFS when Rolling Upgrade from HDP-2.2.6.0 to HDP-2.4.0.0 hi, all I encount a problem when Rolling Upgrade from HDP-2.2.6.0 to HDP-2.4.0.0. Failed on: Pre Upgrade HDFS Stage, the error like follows: 2016-03-30 16:17:20,789 - Task. Type: EXECUTE, Script: scripts/namenode.py - Function: prepare_rolling_upgrade Traceback (most recent call last): File "/var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/namenode.py", line 28, in <module> from resource_management import Script File "/usr/lib/python2.6/site-packages/resource_management/__init__.py", line 23, in <module> from resource_management.libraries import * File "/usr/lib/python2.6/site-packages/resource_management/libraries/__init__.py", line 23, in <module> from resource_management.libraries.functions import * File "/usr/lib/python2.6/site-packages/resource_management/libraries/functions/__init__.py", line 25, in <module> from resource_management.libraries.functions.default import * File "/usr/lib/python2.6/site-packages/resource_management/libraries/functions/default.py", line 24, in <module> from resource_management.libraries.script import Script File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/__init__.py", line 23, in <module> from resource_management.libraries.script.script import * File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py", line 32, in <module> from ambari_commons.constants import UPGRADE_TYPE_NON_ROLLING, UPGRADE_TYPE_ROLLING ImportError: cannot import name UPGRADE_TYPE_NON_ROLLING what should I do, or check something? Best Regards.
