Failing over Oracle connections in a pool

          Hi,
          This message is probably a bit out of context (I've already posted
          it to the JDBC group). I post here as well, since I guess it's
          the place where people have the most experience with clustering
          and HA. Original posting below...
          Could you please tell me whether, yes or no, connections to an
          Oracle database should fail over (when the database fails over
          to another machine)? I use Oracle's Transparent Application Failover
          (configured via Net8) with Weblogic 6 on Linux and Oracle 8.1.7
          on Solaris/SPARC.
          If this doesn't work in my configuration, is there any configuration
          where it should work? (Another version of Oracle, WLS, OS, ...)
          When I try TAF using the PetStore application, I get exceptions
          related to no being connected to the database.
          If TAF doesn't work with WebLogic, is there a way to work around
          the problem? Can I catch these exceptions and renew the connections
          in the pool? Or, what else is possible...?
          I'd appreciate any help. I'd like to demonstrate our HA product
          with WLS. If it doesn't work, I'll turn to iPlanet instead. Pity,
          I really like WLS!
          Thanks in advance for any help or advice!
          Regards, Frank Olsen

          Hi (Frank ;-)
          I got carried away a bit too fast...
          Some more testing shows that it doesn't work in all cases:
          - when someone is trying to check out the shopping cart when the
          the database fails (and fails over), I get exceptions once the
          databses has restarted on the backup node
          - the exceptions are related to some transactions being rolled
          back and Oracle stating that it couldn't safely replay the transactions
          - browsing the categories still works fine
          - all access to the shopping cart and sign-in/sign-out causes time-outs
          and exceptions
          Any ideas what may cause this problem, please?
          Regards,
          Frank Olsen
          "Frank Olsen" <[email protected]> wrote:
          >
          >Hi,
          >
          >TAF worked with WLS 6 on NT with the Oracle 8.1.7 client!
          >
          >Has anyone tested it on Solaris/SPARC?
          >
          >Regards,
          >Frank Olsen
          >
          >
          >
          >"Frank Olsen" <[email protected]> wrote:
          >>
          >>Hi,
          >>
          >>Most of my question below is still valid (in particular
          >>concerning
          >>whether TAF should work with WLS on some or all platforms
          >>and
          >>versions).
          >>
          >>However, when I tested TAF with the Oracle client (sqlplus)
          >>there
          >>also was no failover of the (one) connection. I then
          >checked
          >>the
          >>`V$SESSION' view and the colums related to failover showed
          >>that
          >>TAF was not correctly configured. Strange because I copied
          >>the
          >>`tnsnames.ora' parameters from the Oracle documentation
          >>for TAF.
          >>
          >>Has anyone managed to configure and use TAF, with or
          >without
          >>WLS?!
          >>
          >>Thanks in advance for your help!
          >>
          >>Regards,
          >>Frank Olsen
          >>
          >>
          >>"Frank Olsen" <[email protected]> wrote:
          >>>
          >>>Hi,
          >>>
          >>>This message is probably a bit out of context (I've
          >already
          >>>posted
          >>>it to the JDBC group). I post here as well, since I
          >guess
          >>>it's
          >>>the place where people have the most experience with
          >>clustering
          >>>and HA. Original posting below...
          >>>
          >>>----
          >>>
          >>>Could you please tell me whether, yes or no, connections
          >>>to an
          >>>Oracle database should fail over (when the database
          >fails
          >>>over
          >>>to another machine)? I use Oracle's Transparent Application
          >>>Failover
          >>>(configured via Net8) with Weblogic 6 on Linux and Oracle
          >>>8.1.7
          >>>on Solaris/SPARC.
          >>>
          >>>If this doesn't work in my configuration, is there any
          >>>configuration
          >>>where it should work? (Another version of Oracle,
          >WLS,
          >>>OS, ...)
          >>>
          >>>
          >>>When I try TAF using the PetStore application, I get
          >>exceptions
          >>>related to no being connected to the database.
          >>>
          >>>If TAF doesn't work with WebLogic, is there a way to
          >>work
          >>>around
          >>>the problem? Can I catch these exceptions and renew
          >the
          >>>connections
          >>>in the pool? Or, what else is possible...?
          >>>
          >>>I'd appreciate any help. I'd like to demonstrate our
          >>HA
          >>>product
          >>>with WLS. If it doesn't work, I'll turn to iPlanet instead.
          >>>Pity,
          >>>I really like WLS!
          >>>
          >>>Thanks in advance for any help or advice!
          >>>
          >>>Regards, Frank Olsen
          >>>
          >>
          >

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It appeared to us that the problem was with the Oracle server and that it might have been failing when we were trying to expand our application connection pool size or basically obtain more connections.
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==================================================================
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Hi mesbeg,
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Hi We had Concurrency Strategy:excusive . Now we change that to Database for performace
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how we can resolve this ??

mt wrote:
Hi We had Concurrency Strategy:excusive . Now we change that to Database for performace
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Dear All,
Oracle VM 2.2.2
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If this helped you please click "Vote As Helpful" if it answered your question please click "Mark As Answer"
Georg Thomas | Lync MVP
Blog www.lynced.com.au | Twitter
@georgathomas
Lync Edge Port Check (Beta)

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This is the Code section:
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out.print(odiRef.getColList("", "[COL_NAME]", ",\\n\\t", "", "((INS and !TRG) and REW)")) ;
out.print(" \n\t") ;
out.print(odiRef.getColList(",", "[EXPRESSION]", ",\\n\\t", "", "((INS and TRG) and REW)")) ;
out.print(" \nfrom\t") ;
out.print(odiRef.getTable("L","INT_NAME","A")) ;
out.print(" \n") ;
} else { out.print(" \ninsert into\t") ;
out.print(odiRef.getTable("L","TARG_NAME","A")) ;
out.print(" \n( \n\t") ;
out.print(odiRef.getColList("", "[COL_NAME]", ",\\n\\t", "", "((INS and !TRG) and REW)")) ;
out.print(" \n\t") ;
out.print(odiRef.getColList(",", "[COL_NAME]", ",\\n\\t", "", "((INS and TRG) and REW)")) ;
out.print(" \n) \n\nselect\n    ") ;
out.print(odiRef.getColList("", "[COL_NAME]", ",\\n\\t", "", "((INS and !TRG) and REW)")) ;
out.print("   \n ") ;
out.print(odiRef.getColList(",", "[EXPRESSION]", ",\\n\\t", "", "((INS and TRG) and REW)")) ;
out.print(" \nFROM (\t\n") ;
for (int i=odiRef.getDataSetMin(); i <= odiRef.getDataSetMax(); i++){out.print("\n") ;
out.print(odiRef.getDataSet(i, "Operator")) ;
out.print("\nselect \t") ;
out.print(odiRef.getPop("DISTINCT_ROWS")) ;
out.print("\n\t") ;
out.print(odiRef.getColList(i,"", "[EXPRESSION] [COL_NAME]", ",\\n\\t", "", "((INS and !TRG) and REW)")) ;
out.print(" \nfrom\t") ;
out.print(odiRef.getFrom(i)) ;
out.print("\nwhere\t") ;
if (odiRef.getDataSet(i, "HAS_JRN").equals("1")) { out.print("\n\tJRN_FLAG <> 'D'\t") ;
} else {out.print("\t(1=1)\t") ;
} out.print("\n") ;
out.print(odiRef.getJoin(i)) ;
out.print("\n") ;
out.print(odiRef.getFilter(i)) ;
out.print("\n") ;
out.print(odiRef.getJrnFilter(i)) ;
out.print("\n") ;
out.print(odiRef.getGrpBy(i)) ;
out.print("\n") ;
out.print(odiRef.getHaving(i)) ;
out.print("\n") ;
}out.print("\n) ") ;
out.print(odiRef.getInfo("DEST_TAB_ALIAS_WORD")) ;
out.print(" ODI_GET_FROM\n\n") ;
} out.print("\n") ;
****** ORIGINAL TEXT ******
<%if ( odiRef.getUserExit("FLOW_CONTROL").equals("1") ) { %>
insert into <%=odiRef.getTable("L","TARG_NAME","A")%>
<%=odiRef.getColList("", "[COL_NAME]", ",\n\t", "", "((INS and !TRG) and REW)")%>
<%=odiRef.getColList(",", "[COL_NAME]", ",\n\t", "", "((INS and TRG) and REW)")%>
select <%=odiRef.getColList("", "[COL_NAME]", ",\n\t", "", "((INS and !TRG) and REW)")%>
<%=odiRef.getColList(",", "[EXPRESSION]", ",\n\t", "", "((INS and TRG) and REW)")%>
from <%=odiRef.getTable("L","INT_NAME","A")%>
<% } else { %>
insert into <%=odiRef.getTable("L","TARG_NAME","A")%>
<%=odiRef.getColList("", "[COL_NAME]", ",\n\t", "", "((INS and !TRG) and REW)")%>
<%=odiRef.getColList(",", "[COL_NAME]", ",\n\t", "", "((INS and TRG) and REW)")%>
select
    <%=odiRef.getColList("", "[COL_NAME]", ",\n\t", "", "((INS and !TRG) and REW)")%>
<%=odiRef.getColList(",", "[EXPRESSION]", ",\n\t", "", "((INS and TRG) and REW)")%>
FROM (
<%for (int i=odiRef.getDataSetMin(); i <= odiRef.getDataSetMax(); i++){%>
<%=odiRef.getDataSet(i, "Operator")%>
select <%=odiRef.getPop("DISTINCT_ROWS")%>
<%=odiRef.getColList(i,"", "[EXPRESSION] [COL_NAME]", ",\n\t", "", "((INS and !TRG) and REW)")%>
from <%=odiRef.getFrom(i)%>
where <% if (odiRef.getDataSet(i, "HAS_JRN").equals("1")) { %>
JRN_FLAG <> 'D' <%} else {%> (1=1) <% } %>
<%=odiRef.getJoin(i)%>
<%=odiRef.getFilter(i)%>
<%=odiRef.getJrnFilter(i)%>
<%=odiRef.getGrpBy(i)%>
<%=odiRef.getHaving(i)%>
<%}%>
) <%=odiRef.getInfo("DEST_TAB_ALIAS_WORD")%> ODI_GET_FROM
<% } %>
Any suggestions are highly appreciated.
Mike

Hi Santy,
No, no error or bad files.
Actually the data are moved correctly into the temp table created by ODI, but not from there to the final target table.
I found out the reason though, the knowledge modules imported were from another ODI installation!
I made sure to import the proper KM and it worked.
Thanks!

JDBC - Fail over connection

Hello Group,
I ´m currently working on the follwing szenario in XI (NW2004, SP19):
Via the jdbc adapter I send a sql statement to a database (db1) and get the response. This works fine.
Because it´s a very important request, I have a second database (db2) with exactly the same data as in db1. When the db1 is not reachable, the adapter should connect automatically the db2.
Can I handle this with the jdbc adapter (fail over connection)? Or with another configuration in the XI.
Thanks in advance.
Kind regards,
Martin

hi
you can use a bpm with an exception brach where you specify if first db fail try to connect to db2
it a useful solution

ODI-1228: Task SrcSet0 (Loading) fails on the target ORACLE connection

Hi all. I am using ODI for the first time. Trying to import a flat file data into Oracle table.
Flat file has 4 columns Empno,Ename,Deptno,Salary [2 rows]
so is the Target Table in Oracle [All are VARCHAR2 data type] --Empty table
I am using these KMs: CKM Oracle , IKM SQL CONTROL APPEND, LKM FILE TO SQL.
When I execute this Interface, it fails with the following error message:
ODI-1228: Task SrcSet0 (Loading) fails on the target ORACLE connection [Connection_Name]
Caused By: java.sql.SQLSyntaxErrorException: ORA-00904: : invalid identifier
I checked the Code and Source Code is null , Target Code is: Create Table schema.Load_{table_name} ( )
With no columns in it.
Can anyone help? I am using Oracle ODI 11G (11.1.1)
Thanks in advance

Hi,
if i remember well ( i haven't ODI opened) LKM FILE TO SQL. needs to have all mapping done into staging area. Click on a column, check Staging Area symbol (hammer), save and re-execute.
Remember to check that your mapping is enabled (just click on a column, first checkbox in property inspector)
If it doesn't work please make some screenshot or at least post your execution code.
Let us know

ODI-1228: fails on the target ORACLE connection.

Hi,
I tried running an interface, and encountered the following error:
ODI-1228: Task Pop.ABC (Integration) fails on the target ORACLE connection Dev.
Caused By: java.sql.SQLException: ORA-12170: TNS:Connect timeout occurred
Kindly guide me what will be the reason of its failure.
Thanks.

Hi,
It didnt work.
The same error exists.
The server is located at a remote location. So, what can be done to resolve this issue.
Which value should be appropriate for the parameter to make it work for me?
Thanks.

ODI-1228: Task emp(Integration) fails on the target ORACLE connection Target

Hi all,
I am getting error while executing interface on error. Following error occurs when i am executing interface,
ODI-1228: Task emp(Integration) fails on the target ORACLE connection Target
Caused By: java.sql.SQLException: Non Supported SQL92 token at position: 138
Your help in this regard will be highly appreciated.
Regards
Irfan

Hi all,
I am getting error while executing interface on ODI. Following error occurs when i am executing interface,
ODI-1228: Task emp(Integration) fails on the target ORACLE connection Target
Caused By: java.sql.SQLException: Non Supported SQL92 token at position: 138
Your help in this regard will be highly appreciated.
Regards
Irfan

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