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services/horizon: Fix data races found by integration tests #3690

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bartekn
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@bartekn bartekn commented Jun 14, 2021

PR Checklist

PR Structure

  • This PR has reasonably narrow scope (if not, break it down into smaller PRs).
  • This PR avoids mixing refactoring changes with feature changes (split into two PRs
    otherwise).
  • This PR's title starts with name of package that is most changed in the PR, ex.
    services/friendbot, or all or doc if the changes are broad or impact many
    packages.

Thoroughness

  • This PR adds tests for the most critical parts of the new functionality or fixes.
  • I've updated any docs (developer docs, .md
    files, etc... affected by this change). Take a look in the docs folder for a given service,
    like this one.

Release planning

  • I've updated the relevant CHANGELOG (here for Horizon) if
    needed with deprecations, added features, breaking changes, and DB schema changes.
  • I've decided if this PR requires a new major/minor version according to
    semver, or if it's mainly a patch change. The PR is targeted at the next
    release branch if it's not a patch change.

This commit adds -race flag to Horizon integration tests and fixes two bugs found by race detector:

  • Client.sendRequest overwriting c.HorizonURL when used in multiple go routines.
  • decoder.IgnoreUnknownKeys overwriting gorilla/schema.Decoder.ignoreUnknownKeys when called from multiple go routines.

@bartekn bartekn requested a review from a team June 14, 2021 21:44
@bartekn bartekn added this to the Horizon 2.5.0 milestone Jun 14, 2021
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@Shaptic Shaptic left a comment

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Cool that it caught this!

@@ -26,8 +26,8 @@ import (

// sendRequest builds the URL for the given horizon request and sends the url to a horizon server
func (c *Client) sendRequest(hr HorizonRequest, resp interface{}) (err error) {
c.HorizonURL = c.fixHorizonURL()
req, err := hr.HTTPRequest(c.HorizonURL)
horizonURL := c.fixHorizonURL()
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I think a comment is in order here

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I think we'll need to update the horizonclient release notes as well

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bartekn commented Jun 15, 2021

@2opremio @tamirms Switched to sync.Once and updated CHANGELOG.

@bartekn bartekn merged commit 55f106c into stellar:release-horizon-v2.5.0 Jun 15, 2021
@bartekn bartekn deleted the fix-data-race-bugs-integration-tests branch June 15, 2021 10:10
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4 participants