一台server上 oracle用户下安装有两个实例 rlpd_pre ,  rltest ,   端口不使用默认的 1521 ，两个实例使用不同的端口。


注意查看环境变量 
$   env  |   grep  TNS_ADMIN  是否指向正确的监听文件目录  /volume/r03/rlpd/testdb/10.2.0/network/admin 

cat      /volume/r03/rlpd/testdb/10.2.0/network/admin/listener.ora  

#   因为listener.ora 文件中的监听名称不是默认的 LISTENER ,  而是 RLTEST ,  所以开启时需要
#   使用  lsnrctl   start    RLTEST   


RLTEST =
  (ADDRESS_LIST =
        (ADDRESS= (PROTOCOL= IPC)(KEY= EXTPROCRLTEST))
        (ADDRESS= (PROTOCOL= TCP)(Host= szxxmr54-ts.huawei.com )(Port= 1522))
        (ADDRESS= (PROTOCOL= TCP)(Host= szxxmr54-ts.huawei.com )(Port= 1526))
  )

SID_LIST_RLTEST =
  (SID_LIST =
    (SID_DESC =
      (ORACLE_HOME= /volume/r03/rlpd/testdb/10.2.0)
      (SID_NAME = RLTEST)
    )
    (SID_DESC =
      (ORACLE_HOME= /volume/r03/rlpd/testdb/10.2.0)
      (SID_NAME = RLPD_PRE)
    )
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /volume/r03/rlpd/testdb/10.2.0)
      (PROGRAM = extproc)
    )
  )


STARTUP_WAIT_TIME_RLTEST = 0
CONNECT_TIMEOUT_RLTEST = 10
TRACE_LEVEL_RLTEST = OFF

LOG_DIRECTORY_RLTEST = /volume/r03/rlpd/testdb/10.2.0/network/admin
LOG_FILE_RLTEST = RLTEST
TRACE_DIRECTORY_RLTEST = /volume/r03/rlpd/testdb/10.2.0/network/admin
TRACE_FILE_RLTEST = RLTEST
ADMIN_RESTRICTIONS_RLTEST = ON