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Troubleshooting: "Could not create pool connection" ELFCLASS64 error (WebSphere with Oracle)


When using WebSphere with Oracle, you may receive the following error when you start the application server:

<January 23, 2007 11:14:05 CDT> <Error> <JDBC> <BEA-001150> <Connection Pool “pega_rep1” deployment failed with the following error:
0:Could not create pool connection. The DBMS driver exception was: /u01/app/oracle/product/10.2.02/lib/libocijdbc/ fatal: /u01/app/oracle/product/10.2.02/lib/libocijdbc/ wrong ELF class: ELFCLASS64.>
<January 23, 2007 11:14:05 CDT> <info> <JDBC> <BEA-01156> <Stack trace associated with message 01150 follows:
weblogic.common.resourcepool.ResourceSystemException: Could not create pool connection. The DBMS driver exception was:
u01/app/oracle/product/10.2.02/lib/ java:
fatal: /u01/app/oracle/product/10.2.02/lib/ wrong ELF class: ELFCLASS64 at weblogic.jdbc.common.internal.ConnectionEnvFactory.MakeConnection (
at weblogic.jdbc.common.internal..ConnectionEnvFactory.createResource (
at weblogic.common.resourcepool.ResourcePoolImpl.makeResources (
at weblogic.common.resourcepool.ResourcePoolImpl.makeResources (
at weblogic.common.resourcepool.ResourcePoolImpl.start (
at weblogic.jdbc.common.internal.ConnectionPool.doStart (

This error may appear when you: 

  • Install or upgrade to a new version of Process Commander.
  • Upgrade from Oracle 9i to Oracle 10g.

Note: These are two examples of when this error can occur; you may receive this error under other circumstances.




This error occurs because the LD_LIBRARY_PATH Unix environment variable points to the 64-bit Oracle library files. It should point to the 32-bit Oracle library files, as follows:


From the Oracle command line, change the environment variable as follows:

For C shell users:


For Bourne or Korn shell users


For more information, see the Oracle Metalink note 301956.1 at:

p=130:14:12742755642302416577::::p14_database_id,p14_docid ,p14_show_header,p14_show_help,p14_black_frame,p14_font:NOT,301956.1,1,1,1,helvetica

Article originally written 2/9/2007. 

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