[ZODB-Dev] "Unable to acquire commit lock" from RelStorage

[Chris Withers]

Hi Shane,

What does this exception mean:

Traceback (innermost last):
   Module ZPublisher.Publish, line 135, in publish
   Module Zope2.App.startup, line 291, in commit
   Module transaction._manager, line 89, in commit
   Module transaction._transaction, line 329, in commit
   Module transaction._transaction, line 426, in _commitResources
   Module ZODB.Connection, line 776, in tpc_vote
   Module relstorage.storage, line 783, in tpc_vote
   Module relstorage.storage, line 817, in _vote
   Module relstorage.storage, line 689, in _prepare_tid
   Module relstorage.adapters.locker, line 104, in hold_commit_lock
StorageError: Unable to acquire commit lock

What can cause it?
What are the recommended solutions?

cheers,

Chris

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