XADM: CPU Utilization for Information Store Is at 100%

ID: Q186205

The information in this article applies to:

Microsoft Exchange Server, version 5.0

SYMPTOMS

An Internet Mail conversion thread is caught in a loop due to an incorrectly formatted MIME message.

If your are experiencing this bug, the call stack shown in the Dr. Watson dump (and log) will look like the one below (with thousands of calls to EcCommitStream and EcCommitStreamOp):


 FramePtr  RetAddr   Param1   Param2   Param3   Function Name
 062ef89c  004700d2  00000023 00000004 00000001 STORE!EcCommitStreamOp+0x88
 062ef8ac  004044c6  00000001 00000023 062ef948 STORE!EcCommitStream+0x46
 062ef90c  00403928  062ef928 00005a00 062ef92c STORE!EcRpc+0xb6a
 062ef928  77e11841  00171330 00f8db6c 00176ec0 STORE!EcDoRpc+0x3e
 062ef948  77e52265  004038ea 062efb3c 00000004 RPCRT4!Invoke+0x28
 062ef964  77e52236  004038ea 062efb3c 00000004
  RPCRT4!NdrCallServerManager+0x15
 062efc28  77e51f9e  00000000 00000000 062efe08 0x77e52236
 062efc40  77e1134f  062efe08 062efe08 00163380 RPCRT4!NdrServerCall+0x19
 062efc7c  77e11122  00404af4 062efe08 062efdc4
  RPCRT4!DispatchToStubInC+0x34
 062efcd0  77e112fb  062efe08 00000000 062efdc4
RPCRT4!?DispatchToStubWorker@RPC_INTERFACE@@AAEJPAU_RPC_MESSAGE@@IPAJ@Z+0xb
 0
 062efcf0  77e119cf  062efe08 00000000 062efdc4
  RPCRT4!?DispatchToStub@RPC_INTERFACE@@QAEJPAU_RPC_MESSAGE@@IPAJ@Z+0x41
 062efdc8  77e12b98  00144360 062efe68 062efe08
RPCRT4!?DealWithRequestMessage@WMSG_SASSOCIATION@@QAEXPAT_WMSG_MESSAGE@@0PA
 U_RPC_MESSAGE@@PAPAVWMSG_SBINDING@@IHH@Z+0x182
 062efe40  77e15fff  00144360 062efe68 00000000
RPCRT4!?DealWithLRPCRequest@WMSG_ADDRESS@@AAEPAT_WMSG_MESSAGE@@PAT2@0HPAVWM
 SG_ASSOCIATION@@@Z+0xab
 062eff90  77e162f0  77e163e5 001545f0 062effec
  RPCRT4!?ReceiveLotsaCalls@WMSG_ADDRESS@@AAEXXZ+0x38

CAUSE

The Thread handling this message is caught between commit operations for two converters. A commit operation is issued, and the HRESULT returned is 80040c11. According to the comments before IsIMAILRewindError, these errors indicated that the message should be reconverted. This error is IMAIL_E_REWIND_STREAM_822, which is supposed to cause a rewind and then process as 822. This is passed into the Clean up function, which should set the rewriter to Convert to 822. It does. Internet Mail continually sets the rewind error to be rewind and convert as 822, but it never succeeds or changes.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.0.

A supported fix is now available, but has not been fully regression-tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the next Service Pack that contains this fix. Contact Microsoft Technical Support for more information.

Keywords : XADM
Version : 5.0
Platform : winnt
Issue type : kbbug