TNS-12542 : TNS: Adress already in use

Question

We have 2 SAP System on one SUN Solaris Server. The Listener of the first system EC1 uses the port 1521 , the listener of the second system SO1 user the port 1522 - according to configurations files tnsnames.ora and listener.ora. The problem is that listener of SO1 can't be started and I receive the follow Error-Message Listener ( lsnrctl start) :
"System parameter file is /oracle/SO1/network/admin/listener.ora
Error listening on : <Adress=<Protokol+tcp><Port=1521>>
TNS-12542 : TNS: Adress already in use
TNS-12560 :TNS: protocol adapter error
TNS-00512: Adress already in use
Solaris Error : 125: Adress already in use
From this error message is clearly that Listener of SO1 uses the port of EC1 1521. Where else could be listener ports configurated ? Why the Listener of second system use the port 1521.
On this server runs only one Listener on port 1521 for EC1.
Thank You!
Erika
SAP Basis Consultant

Answer 1

Hi,
this is my listener.ora for SO1:
Filename......: listener.ora
Created.......: created by SAP AG, R/3 Rel. >= 6.10
Name..........:
Date..........:
@(#) $Id: //bc/640-2/src/ins/SAPINST/impl/tpls/ora/ind/LISTENER.ORA#4 $
ADMIN_RESTRICTIONS_LISTENER = on
LISTENER1 =
  (ADDRESS_LIST =
        (ADDRESS =
          (PROTOCOL = IPC)
          (KEY = SO1.WORLD)
        (ADDRESS=
          (PROTOCOL = IPC)
          (KEY = SO1)
        (ADDRESS =
          (COMMUNITY = SAP.WORLD)
          (PROTOCOL = TCP)
          (HOST = sbsfierp)
          (PORT = 1522)
    (ADDRESS =
      (COMMUNITY = SAP.WORLD)
      (PROTOCOL = TCP)
      (HOST = sbsfierp)
      (PORT = 1528)
STARTUP_WAIT_TIME_LISTENER = 0
CONNECT_TIMEOUT_LISTENER = 10
TRACE_LEVEL_LISTENER = OFF
SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SDU = 32768)
      (SID_NAME = SO1)
      (ORACLE_HOME = /oracle/SO1/920_64)
    (SID_DESC =
      (SDU = 32768)
      (SID_NAME = SO1)
      (ORACLE_HOME = /oracle/SO1/920_64)
SID_LIST_LISTENER1 =
  (SID_LIST =
    (SID_DESC =
      (SDU = 32768)
      (SID_NAME = SO1)
      (ORACLE_HOME = /oracle/SO1/920_64)
ADMIN_RESTRICTIONS_LISTENER1 = on
STARTUP_WAIT_TIME_LISTENER1 = 0
CONNECT_TIMEOUT_LISTENER1 = 10
TRACE_LEVEL_LISTENER1 = OFF
And this is my tnsnames.ora for SO1:
Filename......: tnsnames.ora
Created.......: created by SAP AG, R/3 Rel. >= 6.10
Name..........:
Date..........:
@(#) $Id: //bc/640-2/src/ins/SAPINST/impl/tpls/ora/ind/TNSNAMES.ORA#4 $
SO1.WORLD =
  (DESCRIPTION =
    (SDU = 32768)
    (ADDRESS_LIST =
      (ADDRESS =
        (COMMUNITY = SAP.WORLD)
        (PROTOCOL = TCP)
        (HOST = sbsfierp)
        (PORT = 1528)
    (CONNECT_DATA =
      (SID = SO1)
      (GLOBAL_NAME = SO1.WORLD)
Thank You!
Erika