[ZODB-Dev] Hanging ZEO-client hangs all other ZEO-clients?

[Chris Withers]

Dario Lopez-Kästen wrote:

> I am in need for some help. We are using Zope 2.6.2, DBTab on the 
> clients (4 of them on 2 servers) and Directory storage on teh ZEO side.

Out of interest, why are you using DirectoryStorage?

> here is where the wirdness starts. It seems that ALL the clients stop 
> responding. I verified this by acceident when I restarted the two nodes 
> of the first server. Suddenly all four nodes started responding (even 
> the two that where not restarted) and the ZEO-serverlog started to log 
> events again.
> 
> This leads me to wonder if there indeed is some interaction between the 
> ZEO-clients that we need to be aware of.

Well, ZEO storage server is single threaded, so I guess something could 
lock there causing the other clients to wait infinitely for the storage 
server. Never heard of it though. You sure you're using the latest 
DirectoryStorage? Can you reproduce this using just plain FileStorage?

cheers,

Chris

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