you are right!
the problem was the cascaded server (by the way it is a Geowebcache instance
that caches a commercial wms server by Intergraph). Geowebcache was keeping
open the connections after Geoserver requests. I solved the problem playing
with the configuration of the applications server hosting the Geowebcache and
the problem has been solved!
________________________________
Inizio: [email protected] [[email protected]] per conto di Andrea Aime
[[email protected]]
Inviato: sabato 3 dicembre 2011 12.17
Fine: Pierluigi Santin Fintel
Cc: [email protected]
Oggetto: Re: Cascading WMS (last version of geoserver)
On Wed, Nov 30, 2011 at 6:00 PM, Pierluigi Santin Fintel
<[email protected]<mailto:[email protected]>> wrote:
Still problems with my WMS cascading
Everything works perfectly but when the number of concurrent requests on
geoserver arises suddently I have this error: Address already in use: connect
java.net.BindException: Address already in use: connect
when the traffic decreases the tiles of the cascaded wms are again correctly
served.
This one is a problem that occurs in high load situations.
Any clue to solve this?
Are you sure the issue is with GeoServer and not the cascaded server?
I've just tried setting up two GeoServer instances locally, G1 and G2.
G2 runs on 8081, requires authentication for any WMS request.
G1 runs on 8080, cascadeds G2 with authentication enabled, then
built a quick benchmark with Jmeter that uses 32 concurrent threads
making a round of 10000 requests to G1, which are cascaded to G2,
all worked as expected.
Tried to pump up the concurrency level of both the wms store configuration
and the jmeter benchmark up to 128, could not reproduce the error you're seeing.
Cheers
Andrea
--
-------------------------------------------------------
Ing. Andrea Aime
GeoSolutions S.A.S.
Tech lead
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 962313
http://www.geo-solutions.it
http://geo-solutions.blogspot.com/
http://www.youtube.com/user/GeoSolutionsIT
http://www.linkedin.com/in/andreaaime
http://twitter.com/geowolf
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