Date:         Wed, 19 Jun 2002 15:20:02 +0200
Reply-To:     "Z39.50 Next-Generation Initiative" <[log in to unmask]>
Sender:       "Z39.50 Next-Generation Initiative" <[log in to unmask]>
From:         Theo van Veen <[log in to unmask]>
Subject:      Re: Betr.: SessionID Summary
Comments: To: [log in to unmask]
Content-Type: text/plain; charset=US-ASCII

>This Rob thinks that they should as well, with the following question:
>How does a session actually expire?
>
>Will sessionids have a TTL as well? In which case a resultset with a TTL
>longer than the session's TTL is just incorrect.
>
>If they don't have a TTL, then are they just silently expired with no
>warning? In which case I would suggest that sessions shouldn't be expired
>while they have resultsets that still have time left to live as this is
>contrary to the only information presented to the client.
>
>Obviously if the implementation maps a session on to a Z Association and
>the connection to the Z server goes down, then the SRW server is in an
>error state regardless.
>
>(Is there a list of SR[WU] diagnostics somewhere, by the way?)
>
>Rob

I would say, that it is preferred that resultsets time out later than sessions but when it is the other way around, the client could save the original CQL to re-execute the query. 

Theo


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