Intermittent Hangs in Inetinfo with Microsoft SNA DB2 Provider (278457)

SYMPTOMS

When you use the Microsoft SNA Server DB2 Provider from an active server page (.asp page), if you are performing a free statement in one thread, and at the same time another thread is trying to perform a fetch, a hang in Inetinfo may result. In a user dump of the Inetinfo process, you may see a stack trace that is similar to the following:

0:077> kv
ChildEBP RetAddr  Args to Child
045af504 7a206de7 00000188 00000001 7a10af08 drdaapi!DRDAFreeStmt+0x197 (FPO: [Non-Fpo])
045af510 7a10af08 02967ae8 00000188 00000001 ddmsql!sqlFreeStmt+0x17 (FPO: [3,0,0])
045af524 7a10e6ac 002ca558 002ca4d0 002ca4d0 db2oledb!CODBSQLCommand__~CODBSQLCommand+0x38 (FPO: [0,0,1])
045af57c 7a10e43c 00000000 7a110584 00000001 db2oledb!CODBCommand__~CODBCommand+0x23c (FPO: [Non-Fpo])
045af584 7a110584 00000001 00000000 002cb060 db2oledb!CODBCommand__`scalar deleting destructor'+0xc (FPO: [1,0,1])
045af598 7a105029 002ca4d0 04ec3c7c 04ee2dc0 db2oledb!CODBCommand__Release+0x64 (FPO: [1,0,3])
045af5a8 1f4516c6 002cb060 04ee2dc0 1f45182b db2oledb!CODBIAccessor__Release+0x59 (FPO: [1,0,2])
045af5b4 1f45182b 0215e53c 1f445243 04ec3c80 msado15!CParamBuffer__Term+0x27 (FPO: [0,0,1])
045af5bc 1f445243 04ec3c80 1f44502a 04ec3d58 msado15!CParamBuffer__Release+0x14 (FPO: [0,0,1])
045af5c4 1f44502a 04ec3d58 04ec3c70 00000000 msado15!CParameters__ReleaseParameterBuffer+0x15 (FPO: [0,0,1])
045af5fc 1f44ad42 00000000 04ec3c70 04ec3c70 msado15!CCommand__Close+0x3d (FPO: [Non-Fpo])
045af6d0 1f44a9c7 045af9b8 002fe030 045afa9c msado15!CConnection___Close+0x2fa (FPO: [Non-Fpo])
045af6fc 1f464696 04ec3c70 002cbe50 04ec3c70 msado15!CConnection__Close+0x70 (FPO: [Non-Fpo])
045af968 6b6036ad 00000000 00000005 6b653340 msado15!CConnection__SetInternalProperties_256+0x27a (FPO: [Non-Fpo])
00000000 00000000 00000000 00000000 00000000 vbscript+0x36ad