My Oracle Support Banner

RP/MSQ 4.0 (VMS)/MSQ 5.0 (VMS) - Lost secured messages (Doc ID 777532.1)

Last updated on JANUARY 16, 2023

Applies to:

Oracle MessageQ - Version 4.0 and later
Information in this document applies to any platform.
Information in this document applies to any platform


When two processes in UNIX send messages simultaneously to one recipient in VMS, a few messages are getting lost. They
have tried other combinations without loss of messages. The tests were performed using a small snippet of live source
code from <HOST>, <CODE>.c complemented by a small test program, dmg_sender.c. There is no error message in the
logs or the application output. 

Customer first encountered the problem in their production environment where it happened a couple of times per month.
They were able to reproduce the problem in their dev environment. Tests involve 2 senders, sending simultaneously to
the same recipient. They always lose some messages (3-40) when sending 10000 messages simultaneously from each of 2
senders in UNIX to the same recipient VMS, but the other combinations are working fine: The 2 Senders Recipient Result
VMS VMS (same server) OK VMS VMS (different server) OK UNIX UNIX (same server) OK VMS UNIX (different server) OK UNIX
VMS (different server) Not OK (3-40 messages lost out of the 20000 sent) UNIX UNIX (different server) OK


To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!

In this Document

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.