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rpcclient: fix crash in http retry handler #1856

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merged 4 commits into from May 17, 2022
Merged

rpcclient: fix crash in http retry handler #1856

merged 4 commits into from May 17, 2022

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bhandras
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@bhandras bhandras commented May 9, 2022

This PR fixes a crash that happens every time when the post errors max retries times.

guggero
guggero approved these changes May 10, 2022
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LGTM, nice fix 🎉

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Roasbeef
Roasbeef reviewed May 10, 2022
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rpcclient/infrastructure.go Outdated
select {
case <-time.After(backoff):

case <-shutdown:
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👍

@Roasbeef Roasbeef mentioned this pull request May 11, 2022
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Tried this on my local machine running while running lightningnetwork/lnd#6345. I still get the panic error, as the response is nil, and all the retries fail since the my bitcoind could actually never stand up (some openssl dynlib thing messed up my bitcoind install).

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coveralls commented May 11, 2022 •
edited

Pull Request Test Coverage Report for Build 2319772402

  • 0 of 39 (0.0%) changed or added relevant lines in 1 file are covered.
  • 3 unchanged lines in 2 files lost coverage.
  • Overall coverage decreased (-0.03%) to 55.032%
Changes Missing Coverage Covered Lines Changed/Added Lines %
rpcclient/infrastructure.go 0 39 0.0%
Files with Coverage Reduction New Missed Lines %
rpcclient/infrastructure.go 1 0%
txscript/taproot.go 2 95.93%
Totals Coverage Status
Change from base Build 2303916551: -0.03%
Covered Lines: 26435
Relevant Lines: 48036
💛 - Coveralls

@bhandras bhandras force-pushed the rpcclient-fix branch 2 times, most recently from 52a3fbc to fff3453 Compare May 11, 2022 08:02
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Tried this on my local machine running while running lightningnetwork/lnd#6345. I still get the panic error, as the response is nil, and all the retries fail since the my bitcoind could actually never stand up (some openssl dynlib thing messed up my bitcoind install).

In my case the bitcoind wasn't borked but it still crashed after some recurring error that was masked in the retry loop. To be sure we never crash, added coverage for nil result too (will return an "invalid response" error).

@bhandras bhandras requested a review from Roasbeef May 11, 2022 08:04
guggero
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Nice!

Roasbeef
Roasbeef reviewed May 12, 2022
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Thanks for the clarifications! Latest changes are looking a lot better, one final comment re trying to pass back more descriptive error.

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@bhandras bhandras requested a review from Roasbeef May 12, 2022 20:10
@bhandras
rpcclient: fix formatting
ebed192
@bhandras
rpclient: fix masked error causing crash after max retries
9665112 
This commit fixes the error that is masked inside the for loop's scope.
Previously after max retries the error didn't leave the for scope and
therefore httpResponse remained nil which in turn resulted in a crash.
@bhandras
rpcclient: fix backoff logic
9babf1f 
This commit removes Sleep() from the rety handler so that the shutdown
request is always respected. Furthermore the maximum retry count is corrected.
@bhandras
rpcclient: save the last error when retrying
97313ac
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Thanks for the clarifications! Latest changes are looking a lot better, one final comment re trying to pass back more descriptive error.

ptal

Roasbeef
Roasbeef approved these changes May 17, 2022
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LGTM 🚵🏼‍♂️

@Roasbeef Roasbeef merged commit cee92e0 into btcsuite:master May 17, 2022
@bhandras bhandras mentioned this pull request Jun 3, 2022
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@chappjc chappjc mentioned this pull request Mar 29, 2023
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@Roasbeef Roasbeef Roasbeef approved these changes

@guggero guggero guggero approved these changes

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