Command: ChgPassWordString grid welcome1 produced null output

Making new installation of 1/2 Exadata i've got a message:

[root@dm01dbadm01 linux]# ./install.sh -cf ./WorkDir/MegaYEKTTest.xml -s 3

20 Sep 13 14:19:45 [INFO ] Executing Create Users
20 Sep 13 14:19:45 [INFO ] Creating users...
20 Sep 13 14:19:45 [INFO ] Creating users in cluster cluster-clu1 ................................
20 Sep 13 14:20:23 [INFO ] Following errors were found while checking command output:
20 Sep 13 14:20:23 [INFO ] ERROR:
20 Sep 13 14:20:23 [INFO ] Command: ChgPassWordString grid welcome1 produced null output but executed successfully on dm01dbadm03
20 Sep 13 14:20:23 [INFO ] zipping log and WorkDir directories . . 
20 Sep 13 14:20:23 [INFO ] Please send /opt/oracle.SupportTools/linux/WorkDir/Diag-130920_142023.zip to Oracle if you require assistance...
20 Sep 13 14:20:23 [INFO ] OcmdException from node dm01dbadm01.mega.com return code = 2 output string: Error running command ChgPassWordString grid welcome1 on node dm01dbadm03
20 Sep 13 14:20:23 [INFO ] OcmdException from node dm01dbadm01.mega.com return code = 2 output string: Error running Create Users error message Error running oracle.onecommand.deploy.users.DeployUserUtils method createAllUsers






I logined to node 3 and 4 and tried to change password manually, and confirmed the error:

[root@dm01dbadm04 ~]# passwd
Changing password for user root.
... some silent seconds and .
passwd: Authentication token manipulation error

But in node 1 and node 2 passwd worked well.

I did
# strace passwd
and noticed all files passwd is open
open("/etc/pam.d/system-auth", O_READONLY) =...
They are
/etc/passwd, /etc/shadow, /etc/pam.d/passwd, /etc/pam.d/system-auth, /etc/pam.d/other

 Then I compared  these files at good and bad nodes.
Actually the difference was in some commented lines in /etc/pam.d/system-auth in bad node.  

 SOLUTION


I copied files from good node to bad nodes:
/etc/passwd, /etc/shadow, /etc/pam.d/passwd, /etc/pam.d/system-auth, /etc/pam.d/other


And the problem was gone :) !