[ZCM] [ZC] 1201/ 1 Request "PANIC during product installation"

[Collector: Zope Bugs, Features, and Patches ...]

Issue #1201 Update (Request) "PANIC during product installation"
 Status Pending, Zope/bug medium
To followup, visit:
  http://zope.org/Collectors/Zope/1201

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= Request - Entry #1 by slinkp on Jan 22, 2004 1:21 pm

Cannot reliably reproduce, but I *occasionally* get a PANIC during zope
startup on certain products - specifically, CMFCalendar.
This is problematic for any server that must be able to 
restart unattended.

Possibly related: http://zope.org/Collectors/Zope/300

Further discussion & possible mitigation in this thread:
"ConflictError on CMFCalendar ?"
http://aspn.activestate.com/ASPN/Mail/Message/Zope-CMF/1976604

Traceback is as follows:

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2004-01-03T06:54:44 ERROR(200) Zope Couldn't install CMFCalendar
Traceback (innermost last):
  File /zope/SoftwareHome/lib/python/OFS/Application.py, line 581, in install_product
    (Object: Zope)
    (Info: CMFCalendar)
  File /zope/SoftwareHome/lib/python/ZODB/Transaction.py, line 177, in commit
  File /zope/SoftwareHome/lib/python/ZODB/Transaction.py, line 344, in _commit_objects
  File /zope/SoftwareHome/lib/python/ZODB/Connection.py, line 300, in commit
ConflictError: database conflict error (oid 0000000000000002, class OFS.Application.Application)
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2004-01-03T06:54:44 PANIC(300) z2 Startup exception
Traceback (innermost last):
  File /zope/SoftwareHome/z2.py, line 228, in ?
  File /zope/SoftwareHome/lib/python/Zope/__init__.py, line 38, in startup
    (Object: startup)
  File /zope/SoftwareHome/lib/python/Zope/App/startup.py, line 38, in startup
    (Object: ZEO storage at dev-zope-knox01.cti-pet.com 9700)
  File /zope/SoftwareHome/lib/python/OFS/Application.py, line 245, in initialize
    (Object: Zope)
  File /zope/SoftwareHome/lib/python/OFS/Application.py, line 544, in install_products
    (Object: Zope)
  File /zope/SoftwareHome/lib/python/OFS/Application.py, line 581, in install_product
    (Object: Zope)
    (Info: CMFCalendar)
  File /zope/SoftwareHome/lib/python/ZODB/Transaction.py, line 177, in commit
  File /zope/SoftwareHome/lib/python/ZODB/Transaction.py, line 344, in _commit_objects
  File /zope/SoftwareHome/lib/python/ZODB/Connection.py, line 300, in commit
ConflictError: database conflict error (oid 0000000000000002, class OFS.Application.Application)
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