Joachim Werner writes: > I have a Zope 2.5.1 using ZEO on Linux, with Apache as proxy server. The two > ZEO clients run fine for a couple of hours, and then suddenly one of them > stops responding. It's the type of Zope hangs when all processes are fine, > but ZServer just doesn't respond (load is very low, with the CPU 90% idle, > so it is not a performance issue or recursion problem). > > There is no error before this situation happens. The processes just don't > respond any more. The second ZEO keeps running, but that machine also hangs > from time to time, so I guess ZEO is not the problem, and the hardware or > any Linux-specific problems aren't either. > > When the ZServer hangs, I can not access it directly, so it is no problem > with the Apache. > > You see, I don't have any clue on what is happening here. The servers worked > fine for months, and I don't know what specific change could have caused the > problem. > > How can such a situation be debugged? Maybe, you use the "-M" logging and analyse the log with Chris' "requestprofiler". You may see unfinished requests.
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