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•error occurred at recursive SQL level string
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•shared memory realm does not exist
•cannot insert NULL
•TNS:unable to connect to destination
•remote database not found'>ora-02019
•exception encountered: core dump
•inconsistent datatypes
•no data found
•TNS:operation timed out
•PL/SQL: could not find program
•existing state of packages has been discarded
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•ORACLE instance terminated. Disconnection forced
•TNS:packet writer failure
•see ORA-12699
•missing right parenthesis
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•invalid file operation
•quoted string not properly terminated
ORA-12516

ORA-12516

2006-04-06       - By Sandeep S

Reply:     1     2     3     4     5  

Hi,
 There could be couple of reasons for "TNS-12516" .

+ usually seen in case of RAC with multiple instances running and when one
of the
    instances crashes or becomes unavailable for some time .

+ Due to this the instance status does not get registered INSTANTLY with
the listener
    service being used for connectivity .
   because of this delay the TNS error is reported and once the
registration happens
                     the error goes off .
+ One can check whether the the status of the service when error comes up
using
     "lsnrctl service <SERVICENAME>"
                - error gets reported if the connections are in a blocked
status .
+ Possible ways of fixing is
       a) execute command
                   "alter system register;"  - Instance will force service
updates with the listener .
       b) bounce listener  .

Regards

Sandeep S


On 4/6/06, Seah Hong Yee <hongyee@(protected)> wrote:
>
> I have this  SLES9 running oracle 10g for about a year now for
> development/
> testing  purposes. It was running fine for a long time.
>
> However, recently our application went into production and 10 client JDBC
> connect to the server via jdbc. I start getting the follwing error on my
> listener log
>
> TNS-12516: TNS:listener could not find available handler with matching
> protocol stack
>
>
> The following message in on the client side..
>
> The Connection descriptor used by the client was:
> (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(PORT=1521)
> (HOST=miller.polyscientific.com.m
> y))(CONNECT_DATA=(SERVICE_NAME=compiere.polyscientific.com.my)))
> [95]
> ===========> DB_Oracle.getCachedConnection: java.sql.SQLException Source code of java.sql.SQLException:
> Listener
> refu
> sed the connection with the following error:
> ORA-12516 (See ORA-12516.ora-code.com), TNS:listener could not find available handler with matching
> protocol
> stack
> The Connection descriptor used by the client was:
> (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(PORT=1521)
> (HOST=miller.polyscientific.com.m
> y))(CONNECT_DATA=(SERVICE_NAME=compiere.polyscientific.com.my)))
> [95]
> ===========> CConnection.getConnection:
> jdbc:oracle:thin:@//miller.polyscientifi
> c.com.my:1521/compiere.polyscientific.com.my, (1)
> AutoCommit=false,TrxIso=READ_C
> OMMITTED - Listener refused the connection with the following error:
> ORA-12516 (See ORA-12516.ora-code.com), TNS:listener could not find available handler with matching
> protocol
> stack
> The Connection descriptor used by the client was:
> (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(PORT=1521)
> (HOST=miller.polyscientific.com.m
> y))(CONNECT_DATA=(SERVICE_NAME=compiere.polyscientific.com.my)))
> [95]
> ===========> CPreparedStatement.<init>: UPDATE M_Inventory SET
> DocStatus='IP',Up
> dated=TO_DATE('2006-04-06 10:46:07','YYYY-MM-DD
> HH24:MI:SS'),UpdatedBy=106514
> WH
> ERE M_Inventory_ID=1000318 [95]
> org.compiere.util.DBException: No Connection
>         at
> org.compiere.util.CPreparedStatement.<init>(CPreparedStatement.java:6
> 9)
>         at org.compiere.util.DB.executeUpdate(DB.java:674)
>         at org.compiere.util.DB.executeUpdate(DB.java:645)
>         at org.compiere.model.PO.saveUpdate(PO.java:1775)
>         at org.compiere.model.PO.save(PO.java:1512)
>
>
> What could be the source of the problem?
>
>
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