users@grizzly.java.net

Re: Grizzly stops responding ...

From: Alan Williamson <alan_at_blog-city.com>
Date: Tue, 02 Sep 2008 13:48:31 +0100

Telneting to the port yeilded nothing

Oleksiy Stashok wrote:
> Hello Allan,
>
> according to the JStack thread dump - most of the Grizzly worker threads
> are free and ready to execute the requests.
> By "server died" you mean, that it stops to accept requests? Does the
> telnet work on the port?
>
> Pls. let me know... Depending on the answer we will try to localize the
> issue.
>
> Thank you.
>
> WBR,
> Alexey.
>
> On Sep 2, 2008, at 13:03 , Alan Williamson wrote:
>
>> Jeanfrancois, here is the output of the SNAPSHOT jar file you gave me,
>> including the netstat -an output.
>>
>> http://clients.aw20.net/whiteboard/?b=36267
>>
>> JStack thread dump:
>>
>> http://clients.aw20.net/whiteboard/?b=72819
>>
>>
>> It dies very quickly, within minutes. Its not getting a huge amount
>> of traffic YET, it is merely processing 1x1.gif of 49bytes each! So
>> lots of small requests.
>>
>>
>>
>> Alan Williamson wrote:
>>> This morning we moved one of the Grizzly servers out from behind
>>> nginx into its own world, and it died on its ass very quickly.
>>> A quick look around and we see we've run up against this:
>>> http://forums.java.net/jive/thread.jspa?messageID=273693
>>> Which i see is still left unresolved. This was reported in the
>>> Glassfish forums but applies to us as well.
>>> So it would appear that nginx is managing the network connections
>>> infinitely better than Grizzly is on its own, because as soon as we
>>> put it back behind nginx, all is well again.
>>> I don't want to have to put nginx in this path
>>
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>
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Alan Williamson
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