[Zope] KeywordIndex Error and Startup Exception

[Bert Vanderbauwhede]

Hi,

Last night, the Zope service on one of my servers has crashed. When I 
looked into the $STUPID_LOG_FILE, I found that a whole bunch of errors 
had happened during the day, first this one:

-----
2004-02-03T12:49:18 ERROR(200) KeywordIndex unindex_object tried to
retrieve set 'wauw - systeem' from index Subject but couldn't.  This
should not happen.
-----

And next several ones like this:

------
2004-02-03T13:59:03 ERROR(200) KeywordIndex unindex_object could not
remove documentId 1986485462 from index Subject.  This should not
happen.
Traceback (innermost last):
File 
/usr/src/redhat/BUILD/Zope-2.5.1-src/lib/python/Products/PluginIndexes/common/UnIndex.py, 
line 168, in removeForwardIndexEntry
(Object: Subject)
KeyError: 1986485462
------

I have cronjob running that creates a backup and packs Data.fs at 21:00.
This involves stopping and starting Zope. According to $STUPID_LOG_FILE,
this worked well. But later I got this:

------
2004-02-04T00:00:26 PANIC(300) z2 Startup exception
Traceback (innermost last):
File z2.py, line 497, in ?
File <string>, line 1, in ?
File /usr/src/redhat/BUILD/Zope-2.5.1-src/lib/python/Zope/__init__.py, 
line 37, in ?
File 
/usr/src/redhat/BUILD/Zope-2.5.1-src/lib/python/ZODB/FileStorage.py, 
line 213, in __init__
File /usr/src/redhat/BUILD/Zope-2.5.1-src/lib/python/ZODB/lock_file.py, 
line 33, in lock_file
StorageSystemError: Could not lock the database file.  There must be
another process that has opened the file.
<p>
------

This morning, after finding out, I could just restart Zope, as if
nothing had happened. I had the impression that about 20 documents had
disappeared, so I restored Data.fs from the backup I made yestarday
evening.

Questions:

1. What were the KeywordIndex errors all about? Should I get worried?
2. Were the KeywordIndex errors the cause of the crash this night?

I use Python 2.1.3 and Zope 2.5.1, on RedHat 8.0.


Bert Vanderbauwhede...
-- 
"It is goot to shlay your enemies and listen to the
  lamen... lament... vat is dis vord here plis?"