Listener catch-up fix #450
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iansuvak
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feuGeneA,
geoff-vball,
minghinmatthewlam,
bernard-avalabs,
michaelkaplan13 and
cam-schultz
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vms/evm/subscriber.go
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| ) | ||
| // Sleep if this wasn't the last retry | ||
| if i < rpcMaxRetries-1 { | ||
| time.Sleep(time.Duration(i+1) * time.Second) |
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nit: it might be more clear to specify the total timeout/sleep duration (10 seconds across 5 retries) as a constant. Any reason why the subscriber timeout is a constant on each retry, but the rpc timeout grows linearly with each retry?
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Agreed, we should be consistent here.
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I agree but in which direction? constant? Ideally with network resources I like exponential backoffs with jitter but seemed like an overkill here.
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Exponential backoff has come up in previous discussions, but we've come to similar conclusions that it's overkill. Since the overall number of RPC calls is low, optimizing how they're spaced hasn't been a top priority.
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I thought we were tracking that already, but apparently not. I created #453 to do so.
| var err error | ||
| var header *types.Header | ||
| attempt := 1 | ||
| for { |
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why don't we do a regular for attempt=1; attempt < retryAttempts; attempt ++ here
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matching the way that subscriber reattempts right below this
Co-authored-by: cam-schultz <[email protected]> Signed-off-by: Ian Suvak <[email protected]>
Why this should be merged
Addresses #443
How this works
Moves catchup process from subscriber to listener along with the headers channelAfter doing this I realized that this change can be made lighter by passing in an RPC client to the Subscriber as well. That would mean that we can keep the catchup and the headers on the subscriber level.I pivoted to keeping things on the subscriber level and just changing the client and adding retries there
How this was tested
CI
How is this documented
N/A