opatch lsinventory fails with exception: null

Today while doing bug fix patch, opatch lsinventory failed with

 opatch lsinventory
Oracle Interim Patch Installer version 11.1.0.10.1
Copyright (c) 2013, Oracle Corporation.  All rights reserved.

exception msg : null

Ran the same command which we have different opatch version i.e 11.1.0.6.2 and below is the error

 opatch lsinventory

Invoking OPatch 11.1.0.6.2

Oracle Interim Patch Installer version 11.1.0.6.2

Copyright (c) 2007, Oracle Corporation.  All rights reserved.

OPatch could not open log file, logging will not be possible

Oracle Home       : /opt/app/oracle/product/11.1.0

Central Inventory : /opt/app/oracle/oraInventory

   from           : /var/opt/oracle/oraInst.loc

OPatch version    : 11.1.0.6.2

OUI version       : 11.1.0.7.0

OUI location      : /opt/app/oracle/product/11.1.0/oui

Log file location : /opt/app/oracle/product/11.1.0/cfgtoollogs/opatch/opatch2013-09-18_16-38-14PM.log

Inventory load failed... OPatch cannot load inventory for the given Oracle Home.

LsInventorySession failed: LsInventory cannot create the log directory /opt/app/oracle/product/11.1.0/cfgtoollogs/opatch/lsinv/lsinventory2013-09-18_16-38-14PM.txt

java.lang.RuntimeException: LsInventory cannot create the log directory /opt/app/oracle/product/11.1.0/cfgtoollogs/opatch/lsinv/lsinventory2013-09-18_16-38-14PM.txt

        at oracle.opatch.LsInventorySession.init(LsInventorySession.java:217)

        at oracle.opatch.LsInventorySession.loadAndPrintInventory(LsInventorySession.java:373)

        at oracle.opatch.LsInventorySession.process(LsInventorySession.java:324)

        at oracle.opatch.OPatchSession.main(OPatchSession.java:1548)

        at oracle.opatch.OPatch.main(OPatch.java:619)

OPatch failed with error code 73

The opatch directory in $ORACLE_HOME/cfgtoollogs/ is owned by user that doesn't belong to oinstall or dba group:

/opt/app/oracle/product/11.1.0/cfgtoollogs

live @live > ls -ltr

total 12

-rwxrwxrwx   1 oracle     oinstall         0 Aug 17  2010 configToolAllCommands.bak

-rwxrwxrwx   1 oracle     oinstall        57 Aug 17  2010 configToolAllCommands.bak.1

-rwxrwxrwx   1 oracle     oinstall       203 Aug 17  2010 configToolAllCommands

drwxrwxrwx   2 oracle     oinstall      1024 Aug 17  2010 oui

drwxrwxrwx   2 oracle     oinstall      2048 Aug 17  2010 cfgfw

drwxr-xr-x      3 live    cdat           1024 Sep 18 11:37 opatch

Once the permissio has changed to oracle:oinstall

/opt/app/oracle/product/11.1.0/OPatch/opatch

live# opatch lsinventory

Oracle Interim Patch Installer version 11.1.0.10.1

Copyright (c) 2013, Oracle Corporation.  All rights reserved.

Oracle Home       : /opt/app/oracle/product/11.1.0

Central Inventory : /opt/app/oracle/oraInventory

   from           : /opt/app/oracle/product/11.1.0/oraInst.loc

OPatch version    : 11.1.0.10.1

OUI version       : 11.1.0.7.0

Log file location : /opt/app/oracle/product/11.1.0/cfgtoollogs/opatch/opatch2013-09-18_16-44-10PM_1.log

Lsinventory Output file location : /opt/app/oracle/product/11.1.0/cfgtoollogs/opatch/lsinv/lsinventory2013-09-18_16-44-10PM.txt

--------------------------------------------------------------------------------

Installed Top-level Products (2):

Oracle Database 11g                                                  11.1.0.6.0

Oracle Database 11g Patch Set 1                                      11.1.0.7.0

There are 2 products installed in this Oracle Home.

Interim patches (1) :

Patch  8895202      : applied on Mon Jul 23 00:45:41 BST 2012

Unique Patch ID:  13723022

   Created on 30 May 2012, 04:38:42 hrs PST8PDT

   Bugs fixed:

     8895202

--------------------------------------------------------------------------------

OPatch succeeded.