Database Link down crashing server

I have a problem with my server getting a JRun error and
stopping Coldfusion entirely if a linked database becomes
unavailable. My database will still be available and as long as
nothing in the application hits the linked database, my system is
fine. After several hits to the linked database, the Coldfusion
server dies and never logs any error. All of the queries are in
cftry/cfcatch blocks. I am assuming that the database connection is
timing out because of the linked database being unavailable.
Is there any other way to catch these errors so I can error
out without dropping the whole system?
Web Server:
CF MX 6.1 updater 2 with database update patches
Windows Server 2003
IIS 6.0
Database Server:
Oracle 9.4.0.4
Windows Server 2003
Thanks

No solutions, only some thoughts, sorry...
(are you sure you have the _latest_ database updates? really
is pretty essential -
http://www.bpurcell.org/blog/index.cfm?mode=entry&entry=988...
but anyway...)
Assuming that you mean that the linked database is done
within Oracle, so I would see this as a Network/Oracle problem
really.
Best bet would be to set up a two simple databases, link to
one, set datasource to one that contains the link and carry out
some simple tests.
Try what paross1 said in a simple controlled environment and
then if it still breaks, then break it and take a stack dump of
what is going on in the coldfusion server at the time
http://www.adobe.com/go/tn_18339
Bring back what you can and then it might be possible for the
community to help.

Similar Messages

Creating a database link to SQL server

Hi All,
How can I create a database link from Oracle9i Enterprise Edition Release 9.2.0.1.0 DB to MS SQL Server database.
Thanking You
Regards Lakmal

It depends on your requirements.
You can use either Generic Connectivity or Transparent Gateways.
More information can be found here:
http://www.oracle.com/technology/products/gateways/index.html

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Hi all,
i´m tryng to create a dblink between Oracle 10.2.0 in a RHEL4 and a SQL Server.
I can connect using isql but when i try using sqlplus i obtain this error:
SQL> CREATE DATABASE LINK dbl
CONNECT TO "user"
IDENTIFIED BY "pwd"
USING 'hsodbc'; 2 3 4
Enlace con la base de datos creado.
SQL> SELECT * FROM Table_1@dbl;
SELECT * FROM Table_1@dbl
ERROR en línea 1:
ORA-28545: error diagnosticado por Net8 al conectar a un agente (error in Net8 while connecting an agent)
Unable to retrieve text of NETWORK/NCR message 65535
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I think the problem is the ini file inithsodbc.ora.
inithsodbc.ora
# This is a sample agent init file that contains the HS parameters that are
# needed for an ODBC Agent.
# HS init parameters
# AAB - Parametros para asociar un agente ODBC al HS
HS_FDS_CONNECT_INFO = MSQLS
HS_FDS_TRACE_LEVEL = ON
HS_FDS_SHAREABLE_NAME =/usr/local/freetds/lib/libtdsodbc.so
HS_AUTOREGISTER = true
# ODBC specific environment variables
set ODBCINI=/home/oracle/.odbc.ini
listener.ora
# listener.ora Network Configuration File: /app/oracle/oracle/product/10.2.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = STA2)
(ORACLE_HOME = /app/oracle/oracle/product/10.2.0/db_1)
     (SID_DESC = (SID_NAME=hsodbc)
(ORACLE_HOME=/app/oracle/oracle/product/10.2.0/db_1)
(PROGRAM=hsodbc)
                         (ENVS=LD_LIBRARY_PATH=/app/oracle/oracle/product/10.2.0/db_1/lib:/usr/local/lib)
LISTENER =
     (DESCRIPTION =
     (ADDRESS_LIST =
          (ADDRESS = (PROTOCOL = TCP)(HOST = nemesisgr2.hi.inet)(PORT = 1521))
tnsnames.ora
# tnsnames.ora Network Configuration File: /app/oracle/oracle/product/10.2.0/db_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.
DEVSTA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = nemesisgr.hi.inet)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = devSTA)
STA2 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = nemesisgr2.hi.inet)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = STA2)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
STA =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = nemesisgr2.hi.inet)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = STA)
#AAB - Descripcion de servicio para conectar con SQLServer
HSODBC = (DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)
(HOST=nemesisgr2.hi.inet)
(PORT=1521)
(CONNECT_DATA = (SID=hsodbc)
(HS = OK)
ODBC Files
odbc.ini
[ODBC Data Sources]
MSQLS = Microsoft SQL Server
[MSQLS]
Driver = /usr/local/freetds/lib/libtdsodbc.so
Description = Microsoft SQL Server
Trace = No
Servername = sqlserver
Database = master
[Default]
Driver = /usr/local/freetds/lib/libtdsodbc.so
odbcinst.ini
[PostgreSQL]
Description          = ODBC for PostgreSQL
Driver          = /usr/lib/libodbcpsql.so
Setup          = /usr/lib/libodbcpsqlS.so
FileUsage          = 1
[MSQLSDRIVER]
Description          = Driver for MS SQL Server
Driver          = /usr/local/freetds/lib/libtdsodbc.so
Setup          = /usr/lib64/libtdsS.so
FileUsage          = 1
UsageCount          = 5
freetds.conf
# $Id: freetds.conf,v 1.12 2007/12/25 06:02:36 jklowden Exp $
# This file is installed by FreeTDS if no file by the same
# name is found in the installation directory.
# For information about the layout of this file and its settings,
# see the freetds.conf manpage "man freetds.conf".
# Global settings are overridden by those in a database
# server specific section
[global]
# TDS protocol version
;     tds version = 4.2
     # Whether to write a TDSDUMP file for diagnostic purposes
     # (setting this to /tmp is insecure on a multi-user system)
;     dump file = /tmp/freetds.log
;     debug flags = 0xffff
     # Command and connection timeouts
;     timeout = 10
;     connect timeout = 10
     # If you get out-of-memory errors, it may mean that your client
     # is trying to allocate a huge buffer for a TEXT field.
     # Try setting 'text size' to a more reasonable limit
     text size = 64512
# A typical Sybase server
[egServer50]
     host = symachine.domain.com
     port = 5000
     tds version = 5.0
# A typical Microsoft server
[egServer70]
     host = ntmachine.domain.com
     port = 1433
     tds version = 7.0
# Test MS SQl Server
[sqlserver]
     Database = master
     host = pruebas.hi.inet
     port = 1433
     tds version = 7.0
Any ideas??
Thanks in advance.
Alex

I have changed the inithsodbc.ora file including:
HS_FDS_SHAREABLE_NAME =/usr/lib/libodbc.so (I have ODBC installed)
Here you are the other information:
lsnrctl status
LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 23-OCT-2008 09:29:52
Copyright (c) 1991, 2005, Oracle. All rights reserved.
Bienvenido a LSNRCTL, escriba "help" para obtener información.
LSNRCTL> status
Conectándose a (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=nemesisgr2.hi.inet)(PORT=1521)))
ESTADO del LISTENER
Alias LISTENER
Versión TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Fecha de Inicio 22-OCT-2008 19:31:34
Tiempo Actividad 0 días 13 hr. 58 min. 29 seg.
Nivel de Rastreo off
Seguridad ON: Local OS Authentication
SNMP OFF
Parámetros del Listener /app/oracle/oracle/product/10.2.0/db_1/network/admin/listener.ora
Log del Listener /app/oracle/oracle/product/10.2.0/db_1/network/log/listener.log
Recibiendo Resumen de Puntos Finales...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=nemesisgr2)(PORT=1521)))
Resumen de Servicios...
El servicio "STA" tiene 1 instancia(s).
La instancia "STA", con estado READY, tiene 1 manejador(es) para este servicio...
El servicio "STA2" tiene 2 instancia(s).
La instancia "STA2", con estado UNKNOWN, tiene 1 manejador(es) para este servicio...
La instancia "STA2", con estado READY, tiene 1 manejador(es) para este servicio...
El servicio "STA2XDB" tiene 1 instancia(s).
La instancia "STA2", con estado READY, tiene 1 manejador(es) para este servicio...
El servicio "STA2_XPT" tiene 1 instancia(s).
La instancia "STA2", con estado READY, tiene 1 manejador(es) para este servicio...
El servicio "STAXDB" tiene 1 instancia(s).
La instancia "STA", con estado READY, tiene 1 manejador(es) para este servicio...
El servicio "STA_XPT" tiene 1 instancia(s).
La instancia "STA", con estado READY, tiene 1 manejador(es) para este servicio...
El servicio "hsodbc" tiene 1 instancia(s).
La instancia "hsodbc", con estado UNKNOWN, tiene 1 manejador(es) para este servicio...
El comando ha terminado correctamente
LSNRCTL>
hsodbc
There is no output executing this command.
[oracle@nemesisgr2 ~]$ /app/oracle/oracle/product/10.2.0/db_1/bin/hsodbc
[oracle@nemesisgr2 ~]$
tnsping hsodbc
[oracle@nemesisgr2 ~]$ tnsping hsodbc
TNS Ping Utility for Linux: Version 10.2.0.1.0 - Production on 23-OCT-2008 09:35:58
Copyright (c) 1997, 2005, Oracle. All rights reserved.
Archivos de parámetros utilizados:
/app/oracle/oracle/product/10.2.0/db_1/network/admin/sqlnet.ora
Adaptador TNSNAMES utilizado para resolver el alias
Attempting to contact (DESCRIPTION= (ADDRESS=(PROTOCOL=tcp) (HOST=nemesisgr2.hi.inet) (PORT=1521)) (CONNECT_DATA = (SID=hsodbc)) (HS = OK))
Realizado correctamente (40 mseg)
Rgds,
Alex

Strange problem with an Oracle database link to SQL Server

Hi gurus,
Please help me on this problem.
We have an Oracle 10R2 database link to a SQL Server 2000 database. I can select count(*) from The_SQL_Server_Table@myOracleLink, and I can describe The_SQL_Server_Table@myOracleLink, but I cannot select Column1 from The_SQL_Server_Table@myOracleLink! I am getting the ORA-00904: "COLUMN1": invalid identifier error.
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myora9i wrote:
Hi gurus,
Please help me on this problem.
We have an Oracle 10R2 database link to a SQL Server 2000 database. I can select count(*) from The_SQL_Server_Table@myOracleLink, and I can describe The_SQL_Server_Table@myOracleLink, but I cannot select Column1 from The_SQL_Server_Table@myOracleLink! I am getting the ORA-00904: "COLUMN1": invalid identifier error.
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Thank you!
Bennotice "COLUMN1" is different from "Column1"
CaSe MaTTerS!

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balakumar

Hi!
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Regards,
Maxim.

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İ have an oracle 10g DB server.İ need get some of data from AS/400 DB on other location and put them all to my oracle server.İ should create a database link between oracle server and AS400 DB but how will i realize that event.in oracle 10g enterprise manager console i choose administration-database link-create database link.At this step how could i fill the requirement.Which format should i use.
General
* Name:????????     (should i type the AS400 IP?????)
* Net Service Name:????????     (what should i fill)
Public - This database link is available to all users.
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Current User
Fixed User
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Password
Confirm Password
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i want talk between two oracle server. i decided to go for snapshot creation with periodical refresh. For which i am having two oracle server's with different ip address located inside our office setup.
I have created a database link between two servers.
first server name global
userid scott
password tiger
second server name asil
userid scott
password tiger
both the user have been given dba rights.
in both the server the services and listners are all started. i gave the following command to create database link.
from asil server
create public database link global connect by scott identified by tiger using 'global'
the command was successful and the link was created. Now i tried to access a table of the scott user of the global server.
select * from emp@global;
now it is giving error. I want to know how the link can be created and how it can be accessed. i refered the 8i online documentation and done the things based on that. i expect valuble solution from all possible persons
null

A reason for this problem could be that your database is configured that a database link has to have exactly the same name like the global name of the database instance it should connect to.
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HI,
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(CONNECT_DATA=(SID=dg4msql))
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create database link dblink
connect to "sa" identified by "<pswd>"
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On running :select * from test1@dblink i get the following error:
Error starting at line 1 in command:
select * from test1@dblink
Error at Command Line:1 Column:20
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SQL Error: ORA-28513: internal error in heterogeneous remote agent
ORA-02063: preceding line from DBLINK
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If it is for example 10.2.0.3.0 you need to apply the mandatory patch for RDBMS bug 5965763 first before being able to use an 11g gateway. Have a look at MetaLink note 457808.1 for details about this patch.
Regards,
Ed

Database Link Creation and Acessing

i want to talk between two oracle server. i decided to go for snapshot creation with periodical refresh. For which i am having two oracle server's with different ip address located inside our office setup.
I have created a database link between two servers.
first server name global
userid scott
password tiger
second server name asil
userid scott
password tiger
both the user have been given dba rights.
in both the server the services and listners are all started. i gave the following command to create database link.
from asil server
create public database link global connect by scott identified by tiger using 'global'
the command was successful and the link was created. Now i tried to access a table of the scott user of the global server.
select * from emp@global;
now it is giving error. I want to know how the link can be created and how it can be accessed. i refered the 8i online documentation and done the things based on that. i expect valuble solution from all possible persons
null

See link http://kr.forums.oracle.com/forums/thread.jspa?threadID=221081
Hope this helps solve your issue.
thanks
http://swervedba.wordpress.com/

Change of a database link in OWB

I have a good suggestion to change a a database link when a server is moved to another location (in that case the database link of the source module has to be changed)
In OWB 9.0.2 it's not impossible to delete a database link in OWB, so you have to do it manually
(in 9.0.4 it should be possible, but this version is also not easy to use).
- Start SQL Plus and log in as the schema on which the OWB repository is created (e.g. OWB).
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- Create a new database link in the same schema with the new parameters, e.g:
CREATE DATABASE LINK "<dblink name>"
CONNECT TO "<...>" IDENTIFIED BY "<...>"
USING '(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP) (Host = <hostname>) (PORT = 1521))) (CONNECT_DATA = (SID = <sid> )))'
Done!
No stupid errors in OWB when you create the database link in OWB itself.
Regards,
Maurice
;

SQL> create view test_view as select dummy from [email protected]
2 ;
View created.
SQL> select dummy from test_view;
D
X
Execution Plan
0 SELECT STATEMENT (REMOTE) Optimizer=CHOOSE
1 0 TABLE ACCESS (FULL) OF 'DUAL' FIRST9.XXXX.COM
Statistics
7 recursive calls
4 db block gets
2 consistent gets
0 physical reads
212 redo size
363 bytes sent via SQL*Net to client
425 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
1 rows processed
NOW WE PULL OUT THE NETWORK CABLE connecting the two servers.
SQL> select dummy from test_view;
select dummy from test_view
ERROR at line 1:
ORA-02068: following severe error from FIRST9.XXXX.COM
ORA-03113: end-of-file on communication channel
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Hi guys,
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Should I also consider doing this scenario in reverse? Creating user TEST on dev, giving TEST rights to the 4 tables in EMPLOYEE, then creating the database link to connect to department schema on prod database??
Any help will be appreciated. Thanks in advance.

zephyr223 wrote:
Hi guys,
Here's my question. I need to give a contractor Select rights on tables located in two schemas located on two different servers. One server is dev and one is prod. Let's say we have schema user: EMPLOYEE on dev and schema user: DEPARTMENT on prod. The outside contractor needs select rights on all tables in DEPARTMENT schema but only needs select on a few tables ( 4 to be exact) from EMPLOYEE schema.
My initial train of thougth is: CREATE a user named: TEST (random name of course, just used for an example) for contractor on prod. Give user TEST select rights on all tables in DEPARTMENT schema.
Create database link to dev server so user TEST can access EMPLOYEE schema.
How do i go about limiting the user TEST via the database link to only view the 4 tables from EMPLOYEE instead of all teh tables? Only grant them access to those four tables from EMPLOYEE. You have to explicitly grant privileges anyways, and since there is no GRANT SELECT ON <SCHEMA> ability it should not be that difficult.
Should I also consider doing this scenario in reverse? Creating user TEST on dev, giving TEST rights to the 4 tables in EMPLOYEE, then creating the database link to connect to department schema on prod database?? Are you creating database links as the EMPLOYEE and DEPARTMENT users? If so, I would caution against that. Create a "current user" database link for TEST. I think you can manage privileges better that way.
HTH!
HTH!

Database Link makes manipulation slow

i have oracle 8.5 with developer 6i.
my application uses two database server and there is a database link between both server.
when user make a transaction and commit the manipulation procedures post the transaction on local server and on other server through database link.
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