unknown 2842f6b5dc MDEV-4506: Parallel replication: error handling. ...

Add an error code to the wait_for_commit facility.

Now, when a transaction fails, it can signal the error to
any subsequent transaction that is waiting for it to commit.
The waiting transactions then receive the error code back from
wait_for_prior_commit() and can handle the error appropriately.

Also fix one race that could cause crash if @@slave_parallel_threads
were changed several times quickly in succession.

2013-10-14 15:28:16 +02:00

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