[Zope] Exception ThreadLock.error: 'release unlocked lock'

[Jeff Rush]

On Wed, 10 Nov 1999 08:58:01 +0100, Martijn Pieters wrote:

>At 08:03 10/11/99 , Teemu Yli-Elsilä wrote:
>>On Tue, 9 Nov 1999, Martijn Pieters wrote:
>>What happens is that a few hours after
>>inactivity (no accesses) Zope is no longer accepting any logins. You can
>>view the public pages, but UserDb seems to deny all login attempts.

>Can you sure that 
>this inactivity problem is not a time-out within the ZODBCDA/Solid product?

This is most likely a Solid time-out issue.  I believe DAs keep their connection
open all the time, and the SOLID.INI file defaults to a 120-minute inactivity
timeout on the connection.  A question is whether DAs are supposed to
be smart enough to reconnect some number of times before giving up.
This is important for sites that may restart their databases periodically,
or that have occasional network problems -- it'd be a pain to have to
manually reconnect each of your Zope DAs each time that happens.

What do the other DAs do and what is the correct thing to do?

You can turn the time-outs off, as I do here.  Change the parameter(s)
in the SOLID.INI file as below.

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[Srv]

ConnectTimeOut = 0
; Idle time in minutes allowed for connections before they
; are dropped. If set to zero, timeout is inactive.

AbortTimeOut = 120
; Idle time in minutes allowed for transactions before they
; are aborted. If set to zero, timeout is inactive.

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-Jeff Rush