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Type: Task
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Resolution: Fixed
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Priority: Major - P3
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Affects Version/s: None
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Component/s: Sharding
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Fully Compatible
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Sharding 2019-05-06
Until now, the first participant has been both the recovery shard and coordinator shard.
With the single-write-shard implementation of first sending commit to read-only shards, then sending commit to the write-shard, it is unsafe for the first participant to be used as a recovery shard. This is because the first participant may be read-only.
Instead, the first write participant will be the recovery shard.