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Conference decalp::rtrnotes

Title:Reliable Transaction Router
Moderator:TALER::DESHMUKH
Created:Tue Dec 12 1989
Last Modified:Thu Jun 05 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:695
Total number of notes:2564

677.0. "COMSTAUNO message after long delay?" by NYOSS1::nyodialin10.nyo.dec.com::GOODMAN (Roy Goodman) Fri Feb 14 1997 19:20

Hello,

We have seen a network glitch where our sites take quite a while getting 
back in sync.  The logs indicate a lot of traffic related to getting quorum 
back, etc.

After all this activity, some transactions on the front end received a 
COMSTAUNO message, indicating something bad happened (sorry about the 
technical description, but the help says "Commit status unobtainable due to 
unrecoverable error").  This status wasn't returned until about ten minutes 
after the transaction was started.  It seemed that the error was delivered 
about the same time that quorum was regained.

My question is:  Should we have to allow for a ten-minute delay in finding 
out the status of the transaction?  Or is this a real RTR problem?

Thanks for any advice,

Roy Goodman

T.RTitleUserPersonal
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677.1When a COMSTAUNO is reportedFFRANC::DESHMUKHDipankar Deshmukh, RTR (US) EnggTue Feb 18 1997 03:5712
	Ten minutes is what RTR waits to find out what the final transaction
	status was, in order to report back to the client application. It is
	difficult to say whether this is an RTR bug, but there are bona fide
	circumstances under which a frontend node might not have a clue about
	how the transaction finally got resolved.

	In Citicorp's case, since the application is designed to cope with
	retransmitted transactions, perhaps the solution would be to repost
	them, and let the duplicate detection logic weed out the unnecessary
	ones.

	-dipu-