How the requests queued
Dear experts of tuxedo,
a request to a server is maybe waiting in line despite being busy?
The reason we are asking is that we (perhaps unfortunately) not a server with a service that has a dependency to another service on the same server (direct or indirect), let say A and B. Of course, this server is started in multiple instances, but once in a while we experience a "lock" ('specially during heavy load), and so we suspect that B requests can be sent to a busy Forum (and so is be handling A service it will be a "lock")
If this is the case, we know how to solve the problem, that is to configure services in separate proceedings, but if not, we need to study more
Best regards
Kristian
Hello, Kristian,.
It has always been a 'no-no' to make a nested (directly or indirectly) call to another service on the same server, unless the server is multi-threaded.
Tuxedo will place the request in the queue sees it more fit to do as soon as possible. If there is a server idle is an obvious choice, but there is no deadlock.
If there is no idle server Tuxedo will choose a queue, perhaps based on seen the lowest current LOAD queue for her and put the request. Because of Murphy's law, it will be the same server that the request came and boom--there's your blocking :-((sooner or later).
Your best bet is probably put service B in another server. Your option would be to move to a multi-threaded server, but it is quite a project if you (like many of us) don't have any thread-safe code...
Hope this helps,
/ By
Tags: Fusion Middleware
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