[elephant-devel] Concurrency problem?

[Pierre THIERRY]

I may have a problem with concurrency and elephant. I'm developing a web
application using SBCL and Araneida (with it's threaded listener).
Whereas araneida by irself doesn't seem to have problems dealing with
many requests at a time (I tested it with apache's benckmark tool, with
thousands of request, with from 1 to 16 concurrent requests to see how
it reacts), my application just collapses when 3 requests come in a very
short time.

I had an error I did not copied, which was about a persistent slot of an
object being unbound (but I know it should be bound when accessed at
this time), and when trying to access one more time my app, I end up
with this in the debugger:

While accessing database #<POSTGRESQL-DATABASE localhost/efco-immo/pierre OPEN {A80FB99}>
  with expression "SELECT value FROM keyvalue WHERE ((clctn_id = 0) and (key = 'FSAAAAAyAAAANAAAACAAAABUAAAASQAAAFQAAABSAAAARQAAAA=='))":
  Error NIL / 
  has occurred.
   [Condition of type CLSQL-SYS:SQL-DATABASE-DATA-ERROR]

The database itself doesn't seem corrupted, as restarting the
application from scratch, with the same store, works well. For the
moment, I had to shield my app behind an HTTP cache so that requests are
basicaly served to the user by the cache instead of my app...

Concurrently,
Nowhere man
-- 
nowhere.man at levallois.eu.org
OpenPGP 0xD9D50D8A
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 189 bytes
Desc: Digital signature
URL: <https://mailman.common-lisp.net/pipermail/elephant-devel/attachments/20061031/ff6e2a5b/attachment.sig>