[Zope] Zeo Client hanging

Maciej Wisniowski maciej.wisniowski at coig.katowice.pl
Wed Oct 18 01:32:38 EDT 2006

> zope 2.8.5 + zeo
> python 2.3.4 (red hat distribution)
> Red Hat RHEL 4
> Plone 2.1.2
> Our zeo clients hang intermittently.  We have no way of reproducing the
> problem, but it occurs daily.  The client hangs and a restart seems to 
> fix the
> problem.
Install DeadlockDebugger and you'll be able to see what is
the state of your threads when Zope becomes unresponsive.

> In the event log with tracing on we get
> Trace zeo.zrpc.Connection(C) wait(16697) {server:8100} pending, async=0
> There are hundreds to thousands of these until the server is restarted.
> In the zeo log we get
> Error caught in asyncore asyncore.py
> error:(110,'Connection timed out')
I'm not sure what these errors are. Maybe firewall between zeo
server and zeo client closes the connections or something like that?

Maciej Wisniowski

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