hi i've posted this to zope list, and got hints from dieter about the toby-clean-shutdown branch. i apologize if this is not appropriate. i'm restating the question again: since upgrading zope from 2.5.1 + zeo1, i've been having frequent zope/zeo client hanging/not responding. the setup: we have zope-2.6.1-src + zeo-2.0.2 on linux with python 2.1.3 frequently, the zeo client hangs/not responding. output of ps axf is below[1] and the stupid.log[2] i've setup stupid_log_severity=-100 fr ZEO_EVENTS.log, and the last 20 lines of the log is attached. this is when all zeo clients failed to get to the zeoserver.[3] restarting the zeoserver makes things peachy again also, sometimes i got this error[4] in ZEO_EVENTS.log. telnet localhost 8080 GET / HTTP/1.0\n\n resulted in nothing. no time out, nothing running ./stop will only kill the parent process, i.e 17160 in the below example. the other processes can only be killed with a kill -9 17161. restarting the zeoclient will make it respond again. i've tried zeo2.1a1( iirc) and the behaviour is the same i used to run with persistent zeo cache (ZEO_CLIENT=12000) in the ENV, but running without is still the same. i've also tried runnin with -Z1, and -Z- also the same behaviour thanks for any help/pointers ------ ps axf [1] # ps axf|grep py 17560 pts/0 D 0:00 \_ grep py 17160 ? SW 0:00 /usr/bin/python2.1 /usr/local/Zope-2.6.1-src/z2.py -X 17161 ? S 16:39 \_ /usr/bin/python2.1 /usr/local/Zope-2.6.1-src/z2.p 17162 ? S 0:00 \_ /usr/bin/python2.1 /usr/local/Zope-2.6.1-src/ 17165 ? R 26:09 \_ /usr/bin/python2.1 /usr/local/Zope-2.6.1- 17166 ? S 28:26 \_ /usr/bin/python2.1 /usr/local/Zope-2.6.1- 17167 ? S 26:50 \_ /usr/bin/python2.1 /usr/local/Zope-2.6.1- 17168 ? S 27:11 \_ /usr/bin/python2.1 /usr/local/Zope-2.6.1- [2]# tail var/stupid.log ------ 2003-03-21T10:24:53 BLATHER(-100) zrpc-conn:192.168.1.2:12000 calling Invalidate([('\x00\x00\x00\x00\x01\x0bQ\xec', ''), ('\x00\x00\x00\x00\... ------ 2003-03-21T10:25:20 BLATHER(-100) zrpc-conn:192.168.1.2:12000 calling Invalidate([('\x00\x00\x00\x00\x00\x00$\xae', ''), ('\x00\x00\x00\x00\... ------ 2003-03-21T10:25:28 BLATHER(-100) zrpc-conn:192.168.1.2:12000 calling Invalidate([('\x00\x00\x00\x00\x00\x1c\x9a\xd9', ''), ('\x00\x00\x00\x... ------ 2003-03-21T10:25:50 BLATHER(-100) zrpc-conn:192.168.1.2:12000 calling Invalidate([('\x00\x00\x00\x00\x01\x0bQ\xea', ''), ('\x00\x00\x00\x00\... ------ 2003-03-21T10:25:53 BLATHER(-100) zrpc-conn:192.168.1.2:12000 calling Invalidate([('\x00\x00\x00\x00\x01\x0bQ\xea', ''), ('\x00\x00\x00\x00\... [3]# tail -20 ZEO_EVENTS.log.1 ------ 2003-03-24T03:20:07 BLATHER(-100) zrpc-conn:192.168.1.2:36996 calling storea('\x00\x00\x00\x00\x01![\xf6', '\x03K\xc4\x88\x17b\xc7\xbb',... ------ 2003-03-24T03:20:07 BLATHER(-100) zrpc-conn:192.168.1.2:36996 calling storea('\x00\x00\x00\x00\x01*Of', '\x03K\xc4\x88\x17b\xc7\xbb', '(... ------ 2003-03-24T03:20:07 BLATHER(-100) zrpc-conn:192.168.1.2:36996 calling storea('\x00\x00\x00\x00\x01*N\xea', '\x03K\xc4\x88\x17b\xc7\xbb',... ------ 2003-03-24T03:20:07 BLATHER(-100) zrpc-conn:192.168.1.2:36996 calling storea('\x00\x00\x00\x00\x01*N\xeb', '\x03K\xc4\x88\x17b\xc7\xbb',... ------ 2003-03-24T03:20:07 BLATHER(-100) zrpc-conn:192.168.1.2:36996 calling storea('\x00\x00\x00\x00\x01!Z\n', '\x03K\xc4\x88\x17b\xc7\xbb', '... ------ 2003-03-24T03:20:07 BLATHER(-100) zrpc-conn:192.168.1.2:36996 calling storea('\x00\x00\x00\x00\x00\xb0_\xfd', '\x03K\xc4\x88\x17b\xc7\xb... ------ 2003-03-24T03:20:07 BLATHER(-100) zrpc-conn:192.168.1.2:36996 calling vote('\x03K\xc4\x88\x1d$\x91f') ------ 2003-03-24T03:20:07 INFO(0) ZSS:15977/192.168.1.2:36996 Transaction blocked waiting for storage. Clients waiting: 3. ------ 2003-03-24T03:20:07 BLATHER(-100) zrpc-conn:192.168.1.3:50444 calling tpc_begin('\x03K\xc4\x89\xc2\xa9-\x88', ' None', '/Poll/BHQ5/processV... ------ 2003-03-24T03:20:07 BLATHER(-100) zrpc-conn:192.168.1.3:50444 calling tpc_abort('\x03K\xc4\x89\xc2\xa9-\x88') [4]------ 2003-03-24T09:28:16 ERROR(200) Conflict Resolution Unexpected error Traceback (innermost last): File /usr/local/Zope-2.6.1-src/lib/python/ZODB/ConflictResolution.py, line 96, in tryToResolveConflict (Object: /usr/local/ZopeHome/var/Data.fs) SystemError: Failed to import class ClassicHTMLFile from module App.special_dtml ----