fix(bigquery/storage/managedwriter): resolve data races #9360
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This PR adds a non-assertive test which helps expose data races by doing a lot of concurrent write operations on a single ManagedStream instance. As a byproduct, this cleans up two possible races: In the first, a deferred function may incorrectly access a retained context. We change this to grab a reference to the context in the defer where we still retain the lock. In the second, the retry mechanism leverages math/rand and retry processing can yield concurrent usage of the random number source. PR adds a mutex guard to the source. Fixes: googleapis#9301
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🤖 I have created a release *beep* *boop* --- ## [1.59.0](https://togithub.com/googleapis/google-cloud-go/compare/bigquery/v1.58.0...bigquery/v1.59.0) (2024-02-06) ### Features * **bigquery:** Add ExportDataStatstics to QueryStatistics ([#9371](https://togithub.com/googleapis/google-cloud-go/issues/9371)) ([261c8d9](https://togithub.com/googleapis/google-cloud-go/commit/261c8d944b53ac8953ea7d771c4bb50e4078d508)) * **bigquery:** Switch all timestamp representations to int64 usec ([#9368](https://togithub.com/googleapis/google-cloud-go/issues/9368)) ([8c1fb7d](https://togithub.com/googleapis/google-cloud-go/commit/8c1fb7d4728ebc3b21cb0d601952966dca9cd1e8)) ### Bug Fixes * **bigquery/storage/managedwriter:** Resolve data races ([#9360](https://togithub.com/googleapis/google-cloud-go/issues/9360)) ([fa31ec0](https://togithub.com/googleapis/google-cloud-go/commit/fa31ec0c0f04302a9713a9b1d3228bda2ba135c6)) * **bigquery:** Enable universe domain resolution options ([fd1d569](https://togithub.com/googleapis/google-cloud-go/commit/fd1d56930fa8a747be35a224611f4797b8aeb698)) * **bigquery:** Support more timestamp formats for query param ([#9236](https://togithub.com/googleapis/google-cloud-go/issues/9236)) ([cc98509](https://togithub.com/googleapis/google-cloud-go/commit/cc98509fc7961e3d3619b837d13e69f9621386e8)), refs [#9221](https://togithub.com/googleapis/google-cloud-go/issues/9221) --- This PR was generated with [Release Please](https://togithub.com/googleapis/release-please). See [documentation](https://togithub.com/googleapis/release-please#release-please).
This was referenced Feb 13, 2024
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This PR adds a non-assertive test which helps expose data races by doing a lot of concurrent write operations on a single ManagedStream instance.
As a byproduct, this cleans up two possible races: In the first, a deferred function may incorrectly access a retained context. We change this to grab a reference to the context in the defer where we still retain the lock.
In the second, the retry mechanism leverages math/rand and retry processing can yield concurrent usage of the random number source. PR adds a mutex guard to the source.
Fixes: #9301