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docs: abci#Commit: better explain the possible deadlock (#3536)

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Anton Kaliaev
2019-04-09 18:21:35 +02:00
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parent 40da355234
commit 9a415b0572
1 changed files with 7 additions and 2 deletions
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9
docs/spec/abci/apps.md
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@@ -31,8 +31,13 @@ states to the latest committed state at once.
When `Commit` completes, it unlocks the mempool.
Note that it is not possible to send transactions to Tendermint during `Commit` - if your app
tries to send a `/broadcast_tx` to Tendermint during Commit, it will deadlock.
WARNING: if the ABCI app logic processing the `Commit` message sends a
`/broadcast_tx_sync` or `/broadcast_tx_commit` and waits for the response
before proceeding, it will deadlock. Executing those `broadcast_tx` calls
involves acquiring a lock that is held during the `Commit` call, so it's not
possible. If you make the call to the `broadcast_tx` endpoints concurrently,
that's no problem, it just can't be part of the sequential logic of the
`Commit` function.
### Consensus Connection