Oracle 10g ODBC driver (ver 10.1.0.2) : SQLConnect Hangs

hi,
We have a Win32 multithreaded app which uses the given 10g driver, but intermittently all the threads hang on SqlConnect.
After running Adplus the call stack that we get , always point to oranls10. This is the call stack from the last time the server hanged when it tried to do a SQLConnect.The call stack generated by adplus is given below:
ChildEBP RetAddr Args to Child
WARNING: Stack unwind information not available. Following frames may be wrong.
0135f088 612a1833 003ee494 00001399 00000002 ORANLS10!lmsapsc+0x78
0135f2bc 612a176e 003ee494 00000002 00001399 ORANLS10!lmsagbcmt+0x103
0135f2f0 612a1722 003ee494 00001399 00000000 ORANLS10!lmsagbcmt+0x3e
0135f31c 031990f4 003ee494 00001399 00000000 ORANLS10!lmsagbf+0x22
0135f334 036e0bcf 003ee494 00001399 00000000 oci!lmsagbf+0x24
0135f360 036bed2f 02675e4c 00000000 00001399 sqora32!SQLTablesW+0x372df
0135f3b8 036b61c3 02675e4c 0268f418 0267682c sqora32!SQLTablesW+0x1543f
0135f4f0 036a3b2c 0268f334 02675bcc 00000006 sqora32!SQLTablesW+0xc8d3
0135f524 4bf8e667 0268f334 0135f65c 00000006 sqora32!SQLConnectW+0xfc
0135f554 4bf8efed 00000001 0135f65c 00000006 odbc32!SQLInternalConnectW+0xfa
0135f6a4 4bfa1e5e 00781b28 00782628 00000006 odbc32!SQLConnectW+0x250
0135f6e0 00397454 00781b28 01d7fffd fffffffd odbc32!SQLConnect+0x140
01360068 016dc13a 00000005 0136f9d0 0136fa14 libsas!CM_dbopen+0x341
Since we have been facing this issue for a long time, we decided on making use of the SQL_ATTR_LOGIN_TIMEOUT value before we issue a SQLConnect, but that driver doesn't seem to like that option even though it says its 3.5 compliant
lRetcode = SQLSetConnectAttr( OD_DBDBC(pCtx), SQL_ATTR_LOGIN_TIMEOUT,(SQLUINTEGER )10, SQL_IS_UINTEGER );
Setup details
Oracle 10g Release 1 Enterprise database server
App has been built using VC++6 and is running on Win2003 Enterprise Server
Our analysis has shows that the network was fine as other apps were able to connect to the database at that time
Question
1. Is this a Driver related issue? Because when we were using Merant ODBC driver, everything seems to be working fine!
2. Is there some patch that is out there which might resolve this issue?
If you all folks could help or provide some kind of advice , i would really appreciate that.
regards,
GG

Well, do you have a code example that causes it? Don't take this the wrong way, but I've seen more than a few badly written multi-threaded applications which do nothing but corrupt memory and use handles in non-threadsafe ways; all of which cause issues which rear their ugly heads in various odd ways. It may also be an Oracle bug, but comparing two different drivers does not mean it's not your application causing the crash as well.
If you could provide a quick little code sample which causes the issue, I'll take a look at it for you.

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