Merge pull request #1661 from molecula/other-client-rowCache-race

fix other batch client rowCache race

client/batch.go

@@ -824,6 +824,8 @@ func (b *Batch) doTranslation() error {
 			rowCache = make(map[string]agedTranslation)
 			b.rowTranslations[fieldName] = rowCache
 		}
+		// create a lock since we're updating this concurrently below
+		rowCacheLock := &sync.Mutex{}
 
 		i, tt := i, tt
 		eg.Go(func() error {
@@ -845,12 +847,14 @@ func (b *Batch) doTranslation() error {
 			b.log.Debugf("translating %d field keys for %s took %v", len(trans), fieldName, time.Since(start))
 
 			// Apply keys to translation cache.
+			rowCacheLock.Lock()
 			for key, id := range trans {
 				rowCache[key] = agedTranslation{
 					id:       id,
 					lastUsed: b.cycle,
 				}
 			}
+			rowCacheLock.Unlock()
 
 			switch ftype := field.Opts().Type(); ftype {
 			case FieldTypeSet, FieldTypeMutex, FieldTypeTime: