fix: prevent connIO from panicking in race between Close and Enqueue #10948
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This was referenced Nov 30, 2023
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Current dependencies on/for this PR: This stack of pull requests is managed by Graphite. |
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Spotted during a code read. ConnIO unlocks the mutex before attempting to write to the response channel, which could allow another goroutine to call Close() and close the channel, causing a panic.
Fix is to hold the mutex. This won't cause a deadlock because the
select{}has adefaultcase, so we won't block even if the receiver isn't keeping up.