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retry the lock operation only when someone else is holding the lock #102

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retry the lock operation only when someone else is holding the lock #102

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5 changes: 4 additions & 1 deletion etcd/v3/kv_etcd.go
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Original file line number Diff line number Diff line change
Expand Up @@ -696,7 +696,10 @@ func (et *etcdKV) LockWithTimeout(
lockTag := ec.LockerIDInfo{LockerID: lockerID}
kvPair, err := et.Create(key, lockTag, ttl)
startTime := time.Now()
for count := 0; err != nil; count++ {

// Create() will return ErrExist if the lock is being held already. In that case,
// we need to retry.
for count := 0; err == kvdb.ErrExist; count++ {
time.Sleep(duration)
kvPair, err = et.Create(key, lockTag, ttl)
if count > 0 && count%15 == 0 && err != nil {
Expand Down