Cause: fdudat failed due to ORA-01041: internal error. hostdef extension doesn't exist.

I was in morning shift user  pinged me and he told me that any request which they are sumbitting
it is showing Phase=INACTIVE and Status=No manager and i replied aries let me check the issue.
i checked the Concurrent manager logs the cm is not running and it contain below error message.


CM LOG CONTAIN BELOW ERROR
===========================
Shutting down Internal Concurrent Manager : 29-JUL-2013 08:05:11

Reviver is not enabled, not spawning a reviver process.

List of errors encountered:
.............................................................................
_ 1 _
Routine AFPCMT encountered an ORACLE error. ORA-01041: internal error.
hostdef extension doesn't exist
Review your error messages for the cause of the error. (=)_ 2 _
Routine AFPSMG encountered an ORACLE error. ORA-03114: not connected
to ORACLE
.
Review your error messages for the cause of the error. (=)
_ 3 _
Routine FDPCRQ encountered an ORACLE error. ORA-03113: end-of-file on
communication channel
.
Review your error messages for the cause of the error. (=)
.............................................................................
APP-FND-01564: ORACLE error 1041 in fdudat
APP-FND-01564: ORACLE error 1041 in fdudat

Cause: fdudat failed due to ORA-01041: internal error. hostdef extension doesn't exist.
The SQL statement being executed at the time of the error was: &SQLSTMT and was executed from the file &ERRFILE.

List of errors encountered:
.............................................................................
_ 1 _
Routine AFPCAL received failure code while parsing or running your
concurrent program CPMGR
Review your concurrent request log file for more detailed information.
Make sure you are passing arguments in the correct format.
.............................................................................
The ebsoltp_0707@ebsoltp internal concurrent manager has terminated with status 1 - giving up.

When i check concurrent manager at OS level i was able to see hardly two or three processes and started
searching in meta link and google it on  google and did not find any information and then i check server logs i found below message in messages log file.

vi /var/adm/mesages

Jul 29 16:50:11 ctssp automountd[7033]: [ID 748625 daemon.error] 3.27.139.50 server not responding: RPC: Timed o
ut
Jul 29 17:40:14 ctssp last message repeated 1 time
Jul 29 17:50:11 ctssp automountd[7033]: [ID 748625 daemon.error] 3.27.139.50 server not responding: RPC: Timed o
ut
Jul 29 18:20:13 ctssp last message repeated 1 time
Jul 29 18:30:17 ctssp automountd[7033]: [ID 748625 daemon.error] 3.27.139.50 server not responding: RPC: Timed o
ut
Jul 29 21:37:00 ctssp last message repeated 1 time

Cause:Issue with the network or server .

Any program accessing a soft mounted resource whose server is not responding may or may not check the return conditions. If it does, it prints an error message in the form

   ... hostname server not responding: RPC: Timed out

Read more information on http://uw714doc.sco.com/en/NET_nfs/nfsT.clearing_servers.html

Solution:

Check the database connectivity and start Concurrent Manager.

tnsping <SID>   ==> i was able to do it.
sqlplus apps/*********@SID from concurrent Manager Tier.

adcmcctl.sh start apps/<***>