TNS-00583: Valid node checking: unable to parse configuration parameters
TNS-12560: TNS:protocol adapter error TNS-00583: Valid node checking: unable to parse configuration parameters I Received following errors when trying to startup my listener. I verified the listener.ora and sqlnet.ora files and everything seemed to look normal. [oracle@Linux03 encryption_keystore]$ lsnrctl start LSNRCTL for Linux: Version 12.1.0.2.0 - Production on 12-JUL-2016 10:05:32 Copyright (c) 1991, 2014, Oracle. All rights reserved. Starting /u01/app/oracle/product/12.1.0.2/db_1/bin/tnslsnr: please wait... TNSLSNR for Linux: Version 12.1.0.2.0 - Production System parameter file is /u01/app/oracle/product/12.1.0.2/db_1/network/admin/listener.ora Log messages written to /u01/app/oracle/diag/tnslsnr/Linux03/listener/alert/log.xml Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1))) Error listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=Linux03)(PORT=1521))) TNS-12560: TNS:protocol adapter error TNS-00583: Valid node checking...