Ambari 2.4.2 upgrade to Ambari 2.5.0 build 1087

[#1]

I'm doing the following

sudo yum update ambari-server

sudo ambari-server upgrade

Using python  /usr/bin/pythonUpgrading ambari-serverERROR: Unexpected TypeError:
print_info_msg() takes exactly 1 argument (2 given)For more info run
ambari-server with -v or --verbose option

sudo ambari-server upgrade -v

Using python  /usr/bin/pythonUpgrading ambari-serverINFO: Loading properties from
/etc/ambari-server/conf/ambari.propertiesTraceback (most recent call
last):  File "/usr/sbin/ambari-server.py",
line 941, in <module>  mainBody()  File "/usr/sbin/ambari-server.py",
line 911, in mainBody  main(options, args, parser)  File "/usr/sbin/ambari-server.py",
line 863, in main  action_obj.execute()  File "/usr/sbin/ambari-server.py",
line 78, in execute  self.fn(*self.args, **self.kwargs)  File
"/usr/lib/python2.6/site-packages/ambari_server/serverUpgrade.py",
line 337, in upgrade  print_info_msg("Upgrade Ambari
Server", True)TypeError: print_info_msg()
takes exactly 1 argument (2 given)

This is an HA NN and RM cluster with MIT Kerberos on Centos 7.

[#2 · Accepted solution]

I was able to upgrade ambari-server, turns out ambari_commons.logging_utils.py changed print_msg_info() signature from one argument to two and I had ambari-agent still on the old version, the fix is upgrade ambari-server and agent at the same time if both coexist on a server, that way ambari_commons gets updated logging_utils package. In my case, I actually had to reinstall ambari and restore from backup as I messed up the whole thing trying out different scenarios.

this is new function signature https://github.com/apache/ambari/blob/trunk/ambari-common/src/main/python/ambari_commons/logging_uti...

#
# Prints an "info" messsage.
#
def print_info_msg(msg, forced=False):
  if forced:
    print("INFO: " + msg)
    return
  if _VERBOSE:
    print("INFO: " + msg)

this is an old one, from 2.4 branch https://github.com/apache/ambari/blob/branch-2.4.0/ambari-common/src/main/python/ambari_commons/logg...

#
# Prints an "info" messsage.
#
def print_info_msg(msg):
  if _VERBOSE:
    print("INFO: " + msg)

[#3]

addendum: the order of install and upgrade of ambari-server matters and it is the same for Ambari 2.4.2 as well. Morale of the story, read the documentation fully http://docs.hortonworks.com/HDPDocuments/Ambari-2.4.2.0/bk_ambari-upgrade/content/upgrade_ambari.htm...

[#4]

@Artem Ervits

According to the upgrade instructions from 2.4.2 http://docs.hortonworks.com/HDPDocuments/Ambari-2.4.2.0/bk_ambari-upgrade/content/upgrade_ambari.htm...

You upgrade server, then agent and then upgrade the DB schema - 'ambari-server upgrade'

The order is important and should be the same for 2.5.0 as well