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Merge pull request #3892 from xiang90/fix_snapshot_handling

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etcdserver: handle incoming v3 snapshot correctly
This commit is contained in:
Xiang Li 2015-11-19 12:18:18 -08:00
commit c400d05d0a
1 changed files with 18 additions and 5 deletions
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23
etcdserver/server.go
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@ -496,21 +496,34 @@ func (s *EtcdServer) run() {
}
if s.cfg.V3demo {
if err := s.kv.Close(); err != nil {
plog.Panicf("close KV error: %v", err)
}
snapfn, err := s.r.raftStorage.snapStore.getSnapFilePath(apply.snapshot.Metadata.Index)
if err != nil {
plog.Panicf("get snapshot file path error: %v", err)
}
fn := path.Join(s.cfg.StorageDir(), databaseFilename)
if err := os.Rename(snapfn, fn); err != nil {
plog.Panicf("rename snapshot file error: %v", err)
}
s.kv = dstorage.New(fn, &s.consistIndex)
if err := s.kv.Restore(); err != nil {
newKV := dstorage.New(fn, &s.consistIndex)
if err := newKV.Restore(); err != nil {
plog.Panicf("restore KV error: %v", err)
}
oldKV := s.kv
// TODO: swap the kv pointer atomically
s.kv = newKV
s.r.raftStorage.snapStore.kv = newKV
// Closing oldKV might block until all the txns
// on the kv are finished.
// We do not want to wait on closing the old kv.
go func() {
if err := oldKV.Close(); err != nil {
plog.Panicf("close KV error: %v", err)
}
}()
}
if err := s.store.Recovery(apply.snapshot.Data); err != nil {
plog.Panicf("recovery store error: %v", err)