Query over Oracle Transparent Gateway on DB2 hangs the session

I am on Database release 10gR2 using the Oracle Transparent Gateway (v9) installed on a DB2 i*series machine.
The Oracle database is located in the same data center as the DB2 database. When I issue very simple queries such as select count(*) from t, I get a result immediately. However when I issue something like select * from t, I very rarely get any rows back (I will sometimes 39 out of 4000) and the session appears to hang. Our DB2 administrators report that everything looks ok on their end. It's like the query is executed in DB2 but the gateway has trouble replying to the Oracle DB
As a side note, the hung session prevents the database from shutting down but does not prevent the database from closing some processes while trying to shutdown (e.g. J000, MXXX, etc.). This results in an open database with missing processes (non critical).
I think this is a network/firewall issue, has anyone had any similar experiences with the gateway? How can I diagnose the problem?
I should note, other Oracle databases in different locations (and different versions) do not have a problem when running the same queries.
Message was edited by:
SamB

If I remember correctly the V9 TG4DB2/400 was not certified with Oracle database 10gR2; only 10.1. See also Metalink certify page which states:
Operating System: IBM AS/400 Version V5R1 - V5R3
Oracle Transparent Gateway for DB2/400 Version 9.2.0
Oracle Database - Enterprise Edition V10 Version 10g
Status: Desupported
Side Note: the certify version states 10g; this means 10gR1; not 10gR2.
You can crosscheck it while checking out the V10.1/2 gateway certification which explicite lists 10gR2.
So it would be interesting if any 10gR2 database can successfully query the table.

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So it is about the data. Not about the application.
So your task is to make sure that the data layer is robust and consistent. Is performant and scalable. Is reliable. Is secure. And then put the application on top of that data layer.
It is not designing the application totally separate from the data layer and expect to simply swap one data layer for another and that the application will still fit and use that data layer correctly and optimally. (unless your an ISV doing a truly independent RDBMS s/w product, in which case you need to design and write a very large and very complex data access layer that can deal correctly with the specific data layer in use - and no, smelly stuff like Hibernate is not it)

Is Transparent Gateway (4.1.1.1) supported in Oracle 8i

Hi We are having some RDB databases running in conjunction with Oracle 8.0.6.0.0 databases. We have installed Oracle 8.1.7.0.0 recently, and I am wondering if this 8i version is supporting Oracle Transparent Gateway ???
I ran an export in the existing DB 8.0.6, and I get this error during the import to 8.1.7.0.0:
Export file created by EXPORT:V08.00.06 via direct path
import done in US7ASCII character set and US7ASCII NCHAR character set
. importing OPS$2PC61's objects into OPS$2PC61
IMP-00017: following statement failed with ORACLE error 4052:
"ALTER PACKAGE "PKG2PCACTIVITY_LETTER_TRIGGER" COMPILE TIMESTAMP '2001-01-15"
":16:22:44'"
IMP-00003: ORACLE error 4052 encountered
ORA-04052: error occurred when looking up remote object OPS$[email protected]
ORA-00604: error occurred at recursive SQL level 1
ORA-03106: fatal two-task communication protocol error
ORA-02063: preceding line from ICICMSR
This "GTW_SQL" is a object resides on serverside of the gateway and not in the databases (8i or RDB).
I am lost at this point. Any help would be of great use, and appreciated.
Sreedhar Palepu
[email protected]
215-761-7832
null

See this thread Re: Getting LONG RAW from remote database for some useful ideas.
Regards Nigel

Oracle access tables in SQLServer through Transparent Gateway

HI,
I want to access tables in SQLServer2000 through Oracle Transparent Gateway, but i could not get the resqult when I excute sql " select * from mytable@tg4msql".
everthing seems all right and when i use " *tnsping tg4msql* ", it also return OK:
Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)
+(HOST = 192.168.255.10)(PORT = 1521))) (CONNECT_DATA = (SID=tg4msql)) (HS= OK))+
OK (20 毫秒)
but when i excute sql like " select * from mytable@tg4msql ", it does't return anything, just keeps quering till I kill my plsql.
it seems oracle tries to connect to SQLServer through database link but fail.
And i check Transparent Gateway debug log : ORACLE_HOME\tg4msql\trace\tg4msql_agt_964.trc,
the log stops when it gets the logon name.
thanks for answers~
this is Transparent Gateway debug log:
Heterogeneous Agent Release
+10.2.0.1.0+
+(0) hoagprd (2): ; hoagprd Entered.+
+(0) HOACONN.C (244): ; [Transparent gateway for MSSQL] version: 4.6.1.0.0070+
+(0) HOACONN.C (295): ; Class version: 200+
+(0) hoagprd (2): ; hoagprd Exited with retcode = 0.+
+(0) hoainit (3): ; hoainit Entered.+
+(0) (0): ; connect string is: defTdpName=tg4msql;SYNTAX=(ORACLE8_HOA,+
+(0) BASED_ON=ORACLE8, IDENTIFIER_QUOTE_CHAR="",+
+(0) CASE_SENSITIVE=CASE_SENSITIVE_QUOTE);BINDING=<navobj><binding><datasources><da-+
+(0) tasource name='tg4msql' type='MSSQLODBC'+
+(0) connect='HSWINRUN2.tg4msql'><driverProperties/></datasource></datasour-+
+(0) ces><remoteMachines/><environment><optimizer noFlattener='true'/><misc+
+(0) year2000Policy='-1' consumerApi='1' sessionBehavior='4'/><queryProcessor+
+(0) parserDepth='2000' tokenSize='1000' noInsertParameterization='true'+
+(0) noThreadedReadAhead='true'/><debug+
+(0) generalTrace='true'/></environment></binding></navobj>+
+(0) ORACLE SQL SERVER GATEWAY Log File Started at 2010-10-20T19:55:42+
+(0) hoainit (3): ; hoainit Exited with retcode = 0.+
+(0) hoalgon (7): ; hoalgon Entered. name = myuser.+

I checked the active sessions, and found a session was creating databse link, but it didn't stop until i kill it.
STATUS EVENT STATE
ACTIVE HS message to agent WAITING
I have installed the transparent gateway and SQLServer in the same computer.
maybe something wrong happened when transparent gateway connect to the SQLServer. But i don't know how to check it.

Transparent gateway to Sybase: connection error

I have been trying with little success to set up a transparent gateway to a sybase server.
The gateway is an NT 4 workstation, with an oracle server 8.1.7 installed. The sybase server is an ASE 12.0 on a Solaris 8 box.
Are these versions of the products supported? In the gateway documentation only Sybase 11 is mentioned...
Moreover all the examples/schemas given refer to an installation of the gateway on the same machine as the sybase server, whereas in my case the gateway is installed on a separate machine (but it is also stated that this configuration is allowed, provided a sybase client is installed togheter with the gateway).
From what I can make of the error messages / trace files, the problem lies in the gateway not finding the sybase server. But from the sybase client installed on the gateway machine I can connect to the same remote sybase server without hassles, so the sybase client is configured correctly.
Thanks for help,
Gaetano Giunta
Here's the complete details about the situation:
Sybase client version:
Sybase ASE client, version 12.0
sybase environment variables:
SYBASE=e:\sybase
SYBASE_OCS=OCS-12_0
Sybase server:
Sybase ASE 12.0 on Solaris 8
The platform/OS on which the gateway and database reside:
Windows NT 4.0 + SP6a
Machine Name: fsiazi08
Oracle database server:
Oracle 8i enterprise edition, Version: 8.1.7
Oracle SID of the Oracle database server
SID: gate
Full pathname to directory where the Oracle database server is installed
ORACLE_HOME: e:\oracle\ora81
Versions of Net8 Server / client used by the gateway & database
Net8 Version: 8.1.7
Net8 Adapter used by the gateway: TCP/IP
Oracle Transparent Gateway for Sybase:
Version: 8.1.6
Full pathname to directory in which gateway resides:
Path: e:\oracle\ora81\tg4sybs
Listing of spool log if using SQL*Plus, or the SQL statement and error message received
SQL*Plus: Release 8.0.5.0.0 - Production on Mon Feb 18 10:27:51 2002
(c) Copyright 1998 Oracle Corporation. All rights reserved.
Connected to:
Oracle8i Enterprise Edition Release 8.1.7.0.0 - Production
With the Partitioning option
JServer Release 8.1.7.0.0 - Production
SQL> select * from "bdvo"."arcofifo"@pollo
2 /
select * from "bdvo"."arcofifo"@pollo
ERROR at line 1:
ORA-28500: connection from ORACLE to a non-Oracle system returned this message:
[Transparent gateway for SYBASE]ct_connect(): directory service layer: internal directory control
layer error: Requested server name not found.
ORA-02063: preceding 2 lines from POLLO
SQL>
Listings of key files:
tg4sybs_agt_pid.trc log file gathered with HS_FDS_TRACE_LEVEL=on
(0) [Transparent gateway for SYBASE] version: 2.0.4.0.0009
(0) connect string is:
(0) YEAR2000_POLICY=-1;CONSUMER_API=1;SESSION_BEHAVIOR_FLAGS=4;PARSER_DEPTH=2000;E-
(0) XEC_FLAGS = 131080;defTdpName=tg4sybs;binding=(tg4sybs,SYBASE,"sqlbdvlin1");
(0) ORACLE SYBASE GATEWAY Log File Started at 15-Feb-02 16:54:43
(0) ct_connect(): directory service layer: internal directory control layer error:
(0) Requested server name not found.
(0) Unexpected error: Get Sybase Logon: app:TG4SYBS$2, user:, pass:,
(0) service:sqlbdvlin1.TG4SYBS$2, server:sqlbdvlin1
(0) Unexpected error: , connect
(0) ct_connect(): directory service layer: internal directory control layer error:
(0) Requested server name not found.
(0)
(0) Closing log file at FRI FEB 15 16:54:44 2002.
inittg4sybs.ora
# This is a sample agent init file that contains the HS parameters that are
# needed for an SYBASE gateway Agent.
# HS init parameters
#HS_FDS_CONNECT_INFO=sqlbdvlin1.master
#HS_FDS_TRACE_LEVEL=OFF
HS_FDS_CONNECT_INFO=sqlbdvlin1.procs
HS_FDS_TRACE_LEVEL=on
# Environment variables required for the non-Oracle system
set SYBASE=e:\sybase
set SYBASE_OCS=OCS-12_0
tnsnames.ora
# TNSNAMES.ORA Network Configuration File: E:\oracle\ora81\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
GATE =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = fsiazi08)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = gate)
INST1_HTTP =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = fsiazi08)(PORT = 1521))
(CONNECT_DATA =
(SERVER = SHARED)
(SERVICE_NAME = gate)
(PRESENTATION = http://admin)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
tg4sybs = (DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=fsiazi08)(PORT=1521))
(CONNECT_DATA=(SID=tg4sybs))
(HS=OK)
listener.ora
# LISTENER.ORA Network Configuration File: E:\oracle\ora81\network\admin\listener.ora
# Generated by Oracle configuration tools.
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = fsiazi08)(PORT = 1521))
(DESCRIPTION =
(PROTOCOL_STACK =
(PRESENTATION = GIOP)
(SESSION = RAW)
(ADDRESS = (PROTOCOL = TCP)(HOST = fsiazi08)(PORT = 2481))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = E:\oracle\ora81)
(PROGRAM = extproc)
(SID_DESC =
(GLOBAL_DBNAME = gate)
(ORACLE_HOME = E:\oracle\ora81)
(SID_NAME = gate)
(SID_DESC=
(SID_NAME=tg4sybs)
(ORACLE_HOME=E:\oracle\ora81)
(PROGRAM=tg4sybs)
CONNECT_TIMEOUT_LISTENER = 0
Sybase interfaces file (e:\sybase\ini\sql.ini)
;; Sybase Interfaces file
;; <link_type>=<network_driver>,<connection_info>
;; Examples:
;; [JUPITER]
;; QUERY=NLMSNMP,\\JUPITER\pipe\sybase\query
;; WIN3_QUERY=WNLNMP,\\JUPITER\pipe\sybase\query
[bdvlin1]
master=TCP,10.1.1.238,4000
query=TCP,10.1.1.238,4000
Sybase net-library configuration (e:\sybase\ocs-12_0\ini\libtcl.cfg)
; This is the sample Net-Library configuration file which
; shows how to specify the different types of drivers which
; will be used by Client-Library and Server-Library
; applications.
; This is the sample for NT platforms.
[DRIVERS]
NLWNSCK=TCP Sockets
NLWNSCK=TCP/IP Sockets
;[NT_DIRECTORY]
;REGISTRY=LIBDREG ditbase=SOFTWARE\SYBASE\SERVER
;[SECURITY]
;NTLM=LIBSMSSP

Gaetano,
The supported products that we list in the manual is only what we have tested at print time. However we update our certification matrix regularly.
Please refer to the certification matrix on Technet.com ( http://otn.oracle.com/products/gateways/pdf/certmatrix2.pdf) for the latest certified configurations.
It looks like you have installed the gateway in the same Oracle home as the database. With v8.1.6 of the gateway this is not possible. With v9.x onwards this is possible.
You can either reinstall the gateway in another Oracle home or upgrade to v9.x.
I recommend that you upgrade to v9.x, since v8.x will be desupported shortly.
As of v9.x the Sybase gateway is located on the database CD and you can install it by doing a custom install.
Vira

Query ON ORACLE AND OAS UPGRADE PLAN

Currently we are running Oracle Server 7.3.4 Under Unix (SunOS5.7) with access to a Sybase 12.5.0.1 via Oracle-Sybase Transparent Gateway 4.1.1.0.0.
For the web services, we use OAS 4.0.8.1. Our web applications are based on Javascript and Oracle PL/SQL to generate HTML.
We plan to upgrade the Oracle Server from 7.3.4 to Oracle 9iAS version 9.2.0.1.
Our quetions are :
1) Is it necessary to upgrade OAS 4.0.8.1 to Oracle 9iAS?
1a)If we have to upgrade then which version of 9iAS (9.0.2, 9.0.3, 9.0.4)is compatible?
1b)what change, if any, do we have to make to our exisiting applications(Javascript, HTML and PL/SQL-generated HTML) (we understand that the application logic would not have to be change in any
way. Is this so?)
2) Are Oracle Server 9i and Oracle 9iAS Application Server compatible with the SunOS5.7 Unix or is an upgrade to a later version necessary?
3) Do we need to upgrade the Oracle-Sybase Transparent Gateway if we upgrade the Oracle Server to Oracle9i and if so, to what version?
Please confirm that Oracle9.2 has a Gateway to Sybase 12.5.0.1 that will support the features of 7.3.4 gateway (i.e it is downward compatible to 7.3.4
gateway).

Not real sure if this is doable or would help, but perhaps you can load the access table into an Oracle Global Temporary Table? See http://www.oracle-base.com/articles/8i/TemporaryTables.php (and google on it). I think I'm assuming your 11 hour query had something to do with shovelling a bucketload of data to the access side, perhaps if you could show us the plan on the Oracle side that access was generating to get the Oracle data there might be a different answer.
Oftentimes cross-db tools won't use Oracle features like analytics, or do slow-by-slow row processing where a short procedure could do things within the Oracle sql engine and return data in larger arrays.
Sometimes mass data cleansings benefit from using server side tools outside of the db. Do you have the data from before it was loaded to Oracle? What Oracle platform are you on?

Query over Oracle Transparent Gateway on DB2 hangs the session

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