SBL-SMI-00094: Internal: Could not get the IP address

This issue was faced when Siebel application was upgraded along with DB upgrade & OS upgrade. The Siebel services were starting and getting killed after sometime. On checking logs, we could see the below errors -
[parthodas@server1 log]$ more TEST_ENT.server1.log
2021 2016-06-22 01:40:26 2016-06-22 01:40:39 -0700 00000007 001 003f 0001 09 SiebSrvr 0 3385 1439811376 /server1/siebsrvr/enterprises/TEST_ENT/server1/log/TEST_ENT.server1.log 15.5.0.0 [23048] ENU
ServerLog       ServerStartup   1       0000ec04576952b3:0      2016-06-22 01:40:26     Siebel Enterprise Applications Server is starting up
GenericLog      GenericError    1       0000ed02576952b3:0      2016-06-22 01:40:27     (smilobj.cpp (1101) err=1376350 sys=1) SBL-SMI-00094: Internal: Could not get the IP address: Internal: gethostbyname_r ()failed with error. (%sysError)
GenericLog      GenericError    1       0000ed02576952b3:0      2016-06-22 01:40:27     (smilobj.cpp (396) err=1376350 sys=0) SBL-SMI-00094: Internal: Could not get the IP address: Internal: gethostbyname_r ()failed with error. (%sysError)

Siebel upgraded to IP2015. DB upgraded to 12c. OS was upgraded to Linux6. On checking for solutions, nothing fruitful was found. We run the startup script in debug mode to check where it is getting stuck.

Solution:- We need to add one more line at siebenv.csh file. This will help is resolve the issue. Edit siebenv.csh file and add below line --
setenv RESOLV_MULTI off