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adds fallback logic if retransmit multicast fails (backport #17714) #17742
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In retransmit-stage, based on the packet.meta.seed and resulting children/neighbors, each packet is sent to a different set of peers: https://github.com/solana-labs/solana/blob/708bbcb00/core/src/retransmit_stage.rs#L421-L457 However, current code errors out as soon as a multicast call fails, which will skip all the remaining packets: https://github.com/solana-labs/solana/blob/708bbcb00/core/src/retransmit_stage.rs#L467-L470 This can exacerbate packets loss in turbine. This commit: * keeps iterating over retransmit packets for loop even if some intermediate sends fail. * adds a fallback to UdpSocket::send_to if multicast fails. Recent discord chat: https://discord.com/channels/428295358100013066/689412830075551748/849530845052403733 (cherry picked from commit be957f2)
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Codecov Report
@@ Coverage Diff @@
## v1.7 #17742 +/- ##
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- Coverage 82.6% 82.6% -0.1%
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Files 431 431
Lines 119718 119725 +7
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- Hits 98941 98927 -14
- Misses 20777 20798 +21 |
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This is an automatic backport of pull request #17714 done by Mergify.
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