TNS-01155: Incorrectly specified SID_LIST_LISTENER parameter in LISTENER.ORA

Issue: while starting the listener we got the below error.

linux01(oracle:orcl1)/home/oracle: lsnrctl start

LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 15-SEP-2015 03:43:02

Copyright (c) 1991, 2013, Oracle.  All rights reserved.

Starting /opt/oracle/product/11.2.0.4.RAC/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 11.2.0.4.0 - Production
System parameter file is /opt/oracle/product/11.2.0.4.RAC/network/admin/listener.ora
Log messages written to /opt/oracle/diag/tnslsnr/linux01/listener/alert/log.xml
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER)))
TNS-01155: Incorrectly specified SID_LIST_LISTENER parameter in LISTENER.ORA
 NL-00303: syntax error in NV string

Listener failed to start. See the error message(s) above...

Solution: In the listener.ora file there were blank lines under the section SID_LIST_LISTENER. We removed the blank line entries and brought up the listener. (please note that this may be one of the scenarios)

Erroneous listener.ora file excerpts below:

SID_LIST_LISTENER =
  (SID_LIST =
  (SID_DESC =
      (GLOBAL_DBNAME = ORCL1)
      (ORACLE_HOME = /opt/oracle/product/11.2.0.4.RAC)
      (SID_NAME = ORCL1)
   )
<<<<< blank line
(SID_DESC =
      (GLOBAL_DBNAME = ORCL2)
      (ORACLE_HOME = /opt/oracle/product/11.2.0.4.RAC)
      (SID_NAME = ORCL2)
)
<<<<< blank line

)