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Protocol v4.1.4
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@github-actions github-actions released this 29 May 21:17
protocol/v4.1.4
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This release updates full node grpc streaming.

  • Introduces a configurable protocol-side buffered channel of full node streaming updates.

    • prevents the full node from halting/lagging on a slow or unresponsive client by buffering updates.
    • Once the configurable buffer limit is reached, all subscriptions and buffered updates will be dropped.

  • The grpc-streaming-buffer-size CLI flag has been added.

    • Defaults to 1000. Please adjust based on the responsiveness of your client implementation.

  • Metrics emitted

    • Buffer size is emitted as a gauge (grpc_streaming_buffer_size)
    • Number connections is emitted as a gauge (grpc_streaming_num_connections)

Note that the grpc streaming proto changes from v4.1.3 to v4.1.4 are proto-compatible. Current grpc streaming clients will not need to be updated.

Documentation

Add a channel buffer to decouple abci and grpc streaming (backport #1530) #1595

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