title: TNS-12542: TNS:address already in use TNS-12560:TNS:protocol adapter error
body: <p>Facing error below when lsnrctl START  start listener. </p>
  
  <blockquote>
    <p>Error listening on: (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
    TNS-12542: TNS:address already in use  TNS-12560: TNS:protocol adapter
    error   TNS-00512: Address already in use    Linux Error: 98: Address
    already in use</p>
  </blockquote>
  
  <p>listener.ora content as below. NSMS = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = IPC)(KEY = NSMS)) (ADDRESS = (PROTOCOL = TCP)(HOST = 10.99.33.22)(Port = 1522)) ) ) ) SID_LIST_NSMS = (SID_LIST = (SID_DESC = (GLOBAL_DBNAME = NSMS) (ORACLE_HOME = /opt/oracle/product/11.2.0) (SID_NAME = NSMS) ) ) ADMIN_RESTRICTION_NSMS = ON</p>
  
  <p>sqlnet.ora content NAMES.DIRECTORY_PATH= (TNSNAMES) AUTOMATIC_IPC = ON TRACE_LEVEL_CLIENT = OFF TRACE_FILE_CLIENT = /opt/oracle/product/11.2.0/network/trace/client.trc SQLNET.EXPIRE_TIME = 10 TCP.VALIDNODE_CHECKING = YES TCP.INVITED_NODES = (LA) #TCP.EXCLUDED_NODES = (1.22.33.44) # DIAG_SIGHANDLER_ENABLED=NO </p>
  
  <p>tnsname.ora content NSMS = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 10.99.33.22)(Port = 1522)) (ADDRESS = (PROTOCOL = IPC)(KEY = NSMS)) ) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = NSMS) ) ) </p>