-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Paul Williams wrote: > Ok, here is what we have. I did a netstat on both machines, client and > server. The client sees and established connection and the server does > not. In the server log there is a disconnect. As far as hardware > between them, there is a switch (dell powerconnect 6024). Web Server > Directors might get hold of it but there are no hops on traceroute. > Traceroute only shows the client machine and the server machine. > > So the client is just continuously polling the connection but getting > nothing back.
That sounds like some weird kernel / networking problem to me: I don't see how Zope could be able to keep calling 'select' on a socket after the other side has closed it. Is there any possibility that some kind of failover / IP takeover has happened, such that the storage server now running is not the same host / instance as the one to shich the clients originally connected? Are you using LVS + heartbeat, or some kind of hardware load balancer to manage such redundancy? > What we are thinking about doing is changing the code in > zrpc/connection.py to close the connection in wait (line 638 zope > version 2.9.5) if the wait time gets too large or the poll has happened > too many times. > > We are great at plone development, but have very little backend zope > development. Would someone please advise me as to whether this is going > to cause more problems? According to the log message you posted earlier in the thread, your appservers are spewing thousands of log messages from the connection's 'pending' method, although your deadlock debugger output shows the one thread blocked on 'select' inside of the connection's 'wait' method. There should be lots of log messages at TRACE level for the wait call, including a doubling / backoff of the delay value from 1 mx to 1 sec. Do you see those log messages, as well? Tres. - -- =================================================================== Tres Seaver +1 540-429-0999 [EMAIL PROTECTED] Palladion Software "Excellence by Design" http://palladion.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v126.96.36.199 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFF5Dvr+gerLs4ltQ4RAm/HAKCUN5WboOxVGeB11GhEfgYQ3wos3QCdH0TW DbcpXiMPlcQYyx0gewPFMLI= =9A/a -----END PGP SIGNATURE----- _______________________________________________ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )