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Add extra protection for grid reconnects (#18840)

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Race checks would occasionally show race on handleMsgWg WaitGroup by debug messages (used in test only).

Use the `connMu` mutex to protect this against concurrent Wait/Add.

Fixes #18827
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Klaus Post 2024-01-22 09:39:06 -08:00 committed by GitHub
parent 65c4d550cb
commit feeeef71f1
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1 changed files with 6 additions and 0 deletions
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6
internal/grid/connection.go
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@ -831,7 +831,9 @@ func (c *Connection) reconnected() {
c.outgoing.Clear()
// Wait for existing to exit
c.connMu.Lock()
c.handleMsgWg.Wait()
c.connMu.Unlock()
}
func (c *Connection) updateState(s State) {
@ -855,7 +857,9 @@ func (c *Connection) updateState(s State) {
func (c *Connection) handleMessages(ctx context.Context, conn net.Conn) {
// Read goroutine
c.connMu.Lock()
c.handleMsgWg.Add(2)
c.connMu.Unlock()
ctx, cancel := context.WithCancelCause(ctx)
go func() {
defer func() {
@ -1534,7 +1538,9 @@ func (c *Connection) debugMsg(d debugMsg, args ...any) {
c.debugInConn.Close()
}
case debugWaitForExit:
c.connMu.Lock()
c.handleMsgWg.Wait()
c.connMu.Unlock()
case debugSetConnPingDuration:
c.connMu.Lock()
defer c.connMu.Unlock()