This avoids sending multiple abort messages for each storage node (one per
partition it is assigned to).

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When a delayed store is processed, don't take the lock if the transaction
is no more registered (may have been aborted due to a timeout with the
delayed store).
Change the TransactionManager API: add register() that must be called before
any storeObject/storeTransaction operation.

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This requires the live debugger to be enabled. Only master, storage and
client side handle this signal.

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If the last storage node gets disconnected, an operation failure will
occur, so there is no risk of sending AnswerTransactionFinished to client
if some object was not stored.

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onStoreTimeout is called by poll thread, which causes a new local_var to be
implicitly created with a new queue (specific to poll thread, which isn't
supposed to have one).
To know the queue that should receive AnswerHasLock, reuse the one
registered to dispatcher to receive AnswerStoreObject.

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Make it optional, to suit "ping" use, but check that it's always passed
except in that special case.

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This fixes cases where a thread is expecting some answer from queue, and
a packet gets forgotten, as it would block until next expected packet
arrives (if there is no next packet, it will wait forever).

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- Merge sys.exit()
- Remove exit message
- Move out of loop the code that should run once
- Add an XXX

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This check was always false in the case of a client.
Move the 'node is None' condition in the potential scope.

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Keep lock around _initNodeConnection() in connection pool to avoid concurrent
connections to the same storage node.

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- Drop it from app
- Don't split packets as 10000 entries is beyond NEO expectations.
- Iterate over used nodes only (instead of filtering)

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- Remove connector option (not available in master, storage or admin)
- Use '-c' to specify the cluster name

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