Make peer recovery send file chunks async #44468
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dnhatn
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>enhancement
:Distributed/Recovery
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Pinging @elastic/es-distributed |
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@ywelsch @original-brownbear Please review the additional commit: 738ab4e. |
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Thanks Yannick. |
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This PR reintroduces #44040 with an additional commit fixing the notify once assertion. We can call
MultiFileTransfer#onCompletetwice if the recovery is canceled during the clean_files step.Send_files step calls
MultiFileTransfer#onComplete(null)to start the clean_files stepClean_files sends and receives a response before the method returns. The response notifies the phase 1 listener (either success or failure).
Before returning, the clean_files method checkForCancel and throws an exception as the recovery was canceled. This causes the send_files listener to notify the phase1 listener. However, the phase1 listener was notified in step 2 already. The phase1 listener must be notified at most once as it delegates to ListenerFuture.
The new commit allows StepListener to be notified multiple times.
Relates #44040
Relates #36195