ORA-27504: IPC error creating OSD context

I was installing Oracle 11gR1 two node RAC on vmware Linux red hat enterprise 64 bits
When trying to start the newly created instance, myRacDb2, on node 2 I received the following errors:

PRKP-1001 : Error starting instance myRacDb2 on node myRacNode2
SQL*Plus: Release 11.1.0.6.0 - Production on Thu Sep 29 15:12:19 2011 Copyright (c) 1982, 2007, Oracle. All rights reserved.
Enter user-name:
Connected to an idle instance.
SQL> ORA-27504: IPC error creating OSD context
ORA-27300: OS system dependent operation:gethostbyname failed with status: 0
ORA-27301: OS failure message: Error 0
ORA-27302: failure occurred at: skgxpiphost2
ORA-27303: additional information: nodename myRacNode2.myDomain.com
SQL> Disconnected

I then added myRacNode1.myDomain.com and myRacNode2.myDomain.com to the /etc/hosts file with the same ip's as myRacNode1 and myRacNode2

Then I issued the:
srvctl start instance -i myRacDb2 -d myRacDb

 and voila! it worked!

 Some people tend to get this error when uninstalling Oracle 10g from their cluster. Oracle then replaces the file libskgxp11.so in ORACLE_HOME/bin folder for some reason. Please check this link for more info: https://forums.oracle.com/forums/thread.jspa?threadID=650846