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short circuit if no data to migrate

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This commit is contained in:
Jason E. Aten 2020-10-29 02:44:22 +00:00
parent d4df15721d
commit 2d55ffbd28
1 changed files with 6 additions and 1 deletions
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7
txfactory.go
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@ -1327,7 +1327,12 @@ func (f *TxFactory) green2blue(holder *Holder) (err error) {
if err != nil {
return errors.Wrap(err, "TxFactory.green2blue f.greenHasData()")
}
if blueHasData && !greenHasData {
if !blueHasData && !greenHasData {
holder.Logger.Printf("no data in blue or green. No migration or verification to do.")
return nil
}
// INVAR: blue has data.
if !greenHasData {
holder.Logger.Printf("error: cannot migrate from green '%v' because it has no data in it.", greenSrc)
return fmt.Errorf("error: cannot migrate from green '%v' because it has no data in it.", greenSrc)
}