[Zope] Re: ZEO ClientDisconnected error

[Tres Seaver]

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Cyrille Bonnet wrote:
> Hi there,
> 
> One of my clients is using Plone on Solaris 9. We have set up one ZEO
> client on a Solaris machine and a ZEO server on another Solaris machine
> (for testing purposes only at this stage).
> 
> Performance is great but every morning, the first hit to the Plone site
> returns a ClientDisconnected error (see full error log below). It looks
> like the socket on the server gets corrupted or something.
> 
> When the error occurs, the server is non-responsive for a while
> (anywhere between 10 sec and 2 minutes) and then eventually the server
> responds.
> 
> Has anybody seen that before? Is it Zope related or should I look in
> other directions?
> 
> Researching Zope on Solaris, I read somewhere (can't remember where now)
> that Solaris doesn't like long-running processes too much (well, the
> Zope process, for instance). Could it be the culprit here?
> 
> Any advise or pointer welcome.

I would check for a "rude" firewall between your appserver and the
storage server:  one which is closing sockets it sees as "idle" for too
long.  Dieter Maurer has a product which works around such scenarios:

  http://mail.zope.org/pipermail/zodb-dev/2005-June/008967.html


Tres.
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Tres Seaver          +1 202-558-7113          tseaver at palladion.com
Palladion Software   "Excellence by Design"    http://palladion.com
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