Nhat Nguyen d720a64b9e Ensure sendBatch not called recursively (#39988)
This PR introduces AsyncRecoveryTarget which executes remote calls of
peer recovery asynchronously. In this change, we also add a new
assertion to ensure that method sendBatch, which sends a batch of
history operations in phase2, is never called recursively on the same
thread. This new assertion will also be used in method sendFileChunks.
2019-03-18 15:17:21 -04:00
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