ambari 2.2.1.0 start service failed with error

[#1]

I use ambari 2.2.1.0 and use nonroot user running ther server and the agent.

Install hdp 2.3.4.0-3485 is ok,when I try to start the service such as hdfs ,it was failed with errors,the logs content is blow...

stderr: /var/lib/ambari-agent/data/errors-69.txt

Traceback (most recent call last):
  File "/var/lib/ambari-agent/cache/stacks/HDP/2.0.6/hooks/before-START/scripts/hook.py", line 39, in <module>
    BeforeStartHook().execute()
  File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py", line 219, in execute
    method(env)
  File "/var/lib/ambari-agent/cache/stacks/HDP/2.0.6/hooks/before-START/scripts/hook.py", line 28, in hook
    import params
  File "/var/lib/ambari-agent/cache/stacks/HDP/2.0.6/hooks/before-START/scripts/params.py", line 141, in <module>
    ambari_db_rca_password = config['hostLevelParams']['ambari_db_rca_password'][0]
TypeError: 'int' object is unsubscriptable

stdout:   /var/lib/ambari-agent/data/output-69.txt
2016-03-29 12:21:52,902 - The hadoop conf dir /usr/hdp/current/hadoop-client/conf exists, will call conf-select on it for version 2.3.4.0-3485
2016-03-29 12:21:52,902 - Checking if need to create versioned conf dir /etc/hadoop/2.3.4.0-3485/0
2016-03-29 12:21:52,903 - call['conf-select create-conf-dir --package hadoop --stack-version 2.3.4.0-3485 --conf-version 0'] {'logoutput': False, 'sudo': True, 'quiet': False, 'stderr': -1}
2016-03-29 12:21:52,952 - call returned (1, '/etc/hadoop/2.3.4.0-3485/0 exist already', '')
2016-03-29 12:21:52,952 - checked_call['conf-select set-conf-dir --package hadoop --stack-version 2.3.4.0-3485 --conf-version 0'] {'logoutput': False, 'sudo': True, 'quiet': False}
2016-03-29 12:21:52,996 - checked_call returned (0, '/usr/hdp/2.3.4.0-3485/hadoop/conf -> /etc/hadoop/2.3.4.0-3485/0')
2016-03-29 12:21:52,997 - Ensuring that hadoop has the correct symlink structure
2016-03-29 12:21:52,997 - Using hadoop conf dir: /usr/hdp/current/hadoop-client/conf

I had google it for times but no result about.

[#2]

@jeff

I once think it was the upgrade cause this problem，so I use clean virtual machine to try thi s，but problem is still the same。

My OS is centos 6.6 64 bit in virtual box，and I use my local ambari repo ，repo name is ambari 2.2.1 upgrade。When I try to install，I use yum install，an show that 2.2.1 is installed，is this the problem？

[#3 · Accepted solution]

I have reslove the problem.

as I posrt above ,I print the data struct

'ambari_db_rca_password':'123456',

I think it is a sting ,but when I print its type,it is a int type.

So I change the password to 'ambari',it is a sting,then every thing is goto OK!!!

Is still a problem of ambari

[#4]

Please accept best answer or post your comment as answer