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executor: Fix coroutine leak after kill remote connection #46035

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merged 2 commits into from
Aug 14, 2023
Merged

executor: Fix coroutine leak after kill remote connection #46035

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e369611
fix global kill coroutine leak
pingyu Aug 13, 2023
7b09dc5
polish
pingyu Aug 14, 2023
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9 changes: 9 additions & 0 deletions executor/simple.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2608,6 +2608,7 @@
SetFromInfoSchema(sctx.GetInfoSchema()).
SetStoreType(kv.TiDB).
SetTiDBServerID(gcid.ServerID).
SetStartTS(math.MaxUint64). // To make check visibility success.

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Build()
if err != nil {
return err
Expand All @@ -2618,6 +2619,14 @@
return err
}

// Must consume & close the response, otherwise coprocessor task will leak.
defer func() {
_ = resp.Close()
}()
if _, err := resp.Next(ctx); err != nil {
return errors.Trace(err)
}

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executor/simple.go#L2623-L2628 

Added lines #L2623 - L2628 were not covered by tests

logutil.BgLogger().Info("Killed remote connection", zap.Uint64("serverID", gcid.ServerID),
zap.Uint64("conn", gcid.ToConnID()), zap.Bool("query", query))
return err
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