git-svn-id: https://svn.erp5.org/repos/neo/trunk@2358 71dcc9de-d417-0410-9af5-da40c76e7ee4

This solve a race condition where the client's thread poll triggers
connection(Lost|Failed) before a call to ask(). In that case a answer was
registered as expected and never cancelled, which lead to a frozen client.

- Split _connectToPrimaryNode
- Move ConnectionClosed at generic level

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2357 71dcc9de-d417-0410-9af5-da40c76e7ee4

This is required to export data from NEO as done by FileStorage.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2356 71dcc9de-d417-0410-9af5-da40c76e7ee4

Same work was done in common and master specific partition table.

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This change was accidentally committed, and turns out to be incorrect
(3.4.4 tests fail).

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old = 3.4.4 (Zope 2.8.x)
new = 3.10.0b5 (ZODB svn trunk)

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This fixes a potential bug triggered by a storage disconnecting while this
loop would be running, expecting answers from that storage: this would
prevent this loop from ever exiting.

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Maybe we could implement our own daemon system someday, but it's not high
priority enough to even be in the TODO list.

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This fixes problems in multi-database setups (ie. ZODB and other
databases).
For example, imagine a transaction stores an object in ZODB and its
identifier in a relational database.
Then, another process connected to the same databases and polling the
relational database find the new entry, and tried to load the object from
ZODB.
If the second node didn't process invalidation sent by initial transaction
when it starts its transaction, second client would not be able to see that
object, which should not happen (inter-database inconsistency).

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Otherwise the getUUIDList() used to notify non-lost storage nodes that
the transaction is fully locked will also return the uuid of the lost node.

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