What's the problem on my listener?

lsnrctl statusLSNRCTL for Linux: Version 8.1.7.0.0 - Production on 01-11月-
2001 16:20:43
(c) Copyright 1998 Oracle Corporation. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC)))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for Linux: Version 8.1.7.0.0 -
Production
Start Date 01-11月-2001 16:12:44
Uptime 0 days 0 hr. 7 min. 59 sec
Trace Level off
Security OFF
SNMP OFF
Listener Parameter
File /u01/app/oracle/product/8.1.7/network/admin/listener.ora
Listener Log
File /u01/app/oracle/product/8.1.7/network/log/listener.l
og
Services Summary...
ora8 has 1 service handler(s)
ora8 has 2 service handler(s)
PLSExtProc has 1 service handler(s)
The command completed successfully
lsnrctl stop
lsnrctl start
lsnrctl statusLSNRCTL for Linux: Version 8.1.7.0.0 - Production on 01-11月-
2001 17:24:39
(c) Copyright 1998 Oracle Corporation. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC)))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for Linux: Version 8.1.7.0.0 -
Production
Start Date 01-11月-2001 17:24:33
Uptime 0 days 0 hr. 0 min. 5 sec
Trace Level off
Security OFF
SNMP OFF
Listener Parameter
File /u01/app/oracle/product/8.1.7/network/admin/listener.ora
Listener Log
File /u01/app/oracle/product/8.1.7/network/log/listener.l
og
Services Summary...
ora8 has 1 service handler(s)
PLSExtProc has 1 service handler(s)
The command completed successfully
sqlplus system/managersql>select ..........
sql>exit
lsnrctl statusthe result is same as the top
My listener.ora as follows:
# LISTENER.ORA Network Configuration
File: /u01/app/oracle/product/8.1.7/network
/admin/listener.ora
# Generated by Oracle configuration tools.
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = CAccServer)(PORT =
1521))
(DESCRIPTION =
(PROTOCOL_STACK =
(PRESENTATION = GIOP)
(SESSION = RAW)
(ADDRESS = (PROTOCOL = TCP)(HOST = CAccServer)(PORT =
2481))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /u01/app/oracle/product/8.1.7)
(PROGRAM = extproc)
(SID_DESC =
(GLOBAL_DBNAME = CAORA)
(ORACLE_HOME = /u01/app/oracle/product/8.1.7)
(SID_NAME = ora8)
PLZ Tell me any problem on my listerner.THX in advance.

When I restart the listener,the listener status is
different.First the listener's summery as follows:
Services Summary...
ora8 has 1 service handler(s)
ora8 has 2 service handler(s)
PLSExtProc has 1 service handler(s)
,but when i restart the listener,the listener's summery is:
Services Summary...
ora8 has 1 service handler(s)
PLSExtProc has 1 service handler(s)
After a while the listener's status is:
Services Summary...
ora8 has 1 service handler(s)
ora8 has 2 service handler(s)
PLSExtProc has 1 service handler(s)
My problem is:I have no action to the DB,Why the number of
service changed.

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