Microsoft KB Archive/70875

PROLM9103003: Large Message Server Out of Resource Problems ID Number: Q70875

2.00b OS/2 buglist2.00b

Summary:

PROBLEM ID: OLM9103003

SYMPTOMS Under the following circumstances, when using PATCH 5, the server can crash, or exhibit other strange behavior, if the server is processing large message named pipe transactions and it runs out of resources:

1. The Server machine crashes after error 71 is returned to the client, while the client is attempting to retry a DosWrite() call. No tombstone symbol is displayed; the system just crashes and must be rebooted. CTRL+ALT+DEL does not work, and the mouse does not track.
2. If a DosWrite() call made by a client fails and error 55 is returned to the client (followed by error 240 on a subsequent operation), the server’s DosRead() call will still succeed with error 0, but the call states that 0 bytes were read (actual write size was 65510, and it was a message-mode operation).
3. A DosWrite() call made by a client never unblocks, and the server’s DosRead() call returns fewer bytes read than were in the message-mode DosWrite() call (for example, 4092 bytes are read instead of the requested 65530 bytes), and an ERROR_MORE_DATA error message is returned. The DosRead() call was used with a user buffer of 65535 bytes, so the ERROR_MORE_DATA error message is not appropriate.

CAUSE These problems only occur if the server runs out of resources.

STATUS Microsoft has confirmed these to be problems in OS/2 LAN Manager version 2.00b. We are researching these problems and will post new information here as it becomes available.