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store: fix data race when modify event in watchHub.

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The event got from watchHub should be considered as readonly.
To modify it, we first need to get a clone of it or there might
be a data race.
This commit is contained in:
Xiang Li 2015-12-09 10:11:51 -08:00
parent 0fb2d5d4d3
commit e0c7768f94
1 changed files with 3 additions and 2 deletions
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5
store/watcher_hub.go
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@ -78,8 +78,9 @@ func (wh *watcherHub) watch(key string, recursive, stream bool, index, storeInde
defer wh.mutex.Unlock()
// If the event exists in the known history, append the EtcdIndex and return immediately
if event != nil {
event.EtcdIndex = storeIndex
w.eventChan <- event
ne := event.Clone()
ne.EtcdIndex = storeIndex
w.eventChan <- ne
return w, nil
}