[ZCM] [ZC] 1970/ 1 Request "StorageTransactionError: Multiple simultaneous tpc_begin requests from one"

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

Issue #1970 Update (Request) "StorageTransactionError: Multiple simultaneous tpc_begin requests from one"
 Status Pending, Database/bug medium
To followup, visit:
  http://www.zope.org/Collectors/Zope/1970

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= Request - Entry #1 by chrisw on Dec 15, 2005 11:57 am

In a ZEO cluster the following got spat out by MailingLogger:

08:55 - Traceback (most recent call last):
"lib/python/transaction/_transaction.py",
line 422, in _commitResources
    rm.tpc_begin(self)
  File "lib/python/ZODB/Connection.py", line
446, in tpc_begin
    self._normal_storage.tpc_begin(transaction)
  File "lib/python/ZEO/ClientStorage.py",
line 914, in tpc_begin
    txn._extension, tid, status)
  File "lib/python/ZEO/ServerStub.py", line
232, in tpc_begin
    return self.rpc.call('tpc_begin', id, user, descr, ext, tid, status)
  File "lib/python/ZEO/zrpc/connection.py",
line 536, in call
    raise inst # error raised by server 

This was on one of the clients.
It only happened the once, and no ill effects were detected, although our users are notoriously bad at telling us when things go wrong.

Recording here just so it doesn't get lost in the lists. Would be great to be able to reproduce and fix, but I can't do either ;-)
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