Update attempts freezing in clerk

[Kenneth Brody]

Quoting John Esak (Fri, 15 Aug 2008 14:06:34 -0400):

> Is there any chance the freechain program is running without any
> notification to the screen?
>
> The reason why I ask, is freechain locks every updating user just exactly as
> you describe when it runs.

Not quite. It would lock someone out of adding or deleting a record,
because the freechain is locked.  But, it won't affect updating an
existing record.

[...]
>> At those moments, I find the following: I enter the problem file like
>> this:
>>
>> 	dclerk 3disp -s1 -y - -z -
>>
>> I can navigate through records without a problem.  But when I press "U"
>> at any record, the session freezes, does not respond to BREAK or QUIT.
>> I must do a kill -9 from a different session to regain control.

And, not responding even to QUIT says something more than record locking
is involved here.

[...]
>> During these events showlock does not report any unexpected locks (I
>> check key, data, indexes, map and lockfile).  I have sometimes found
>> several zombie freechain processes, but I think that's a red herring.
[...]

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