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miner, consensus/clique: avoid memory leak during block stasis #23861

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Merged
holiman merged 1 commit into from
Nov 5, 2021
Merged

miner, consensus/clique: avoid memory leak during block stasis #23861

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6 changes: 2 additions & 4 deletions consensus/clique/clique.go
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Original file line number Diff line number Diff line change
Expand Up @@ -600,8 +600,7 @@ func (c *Clique) Seal(chain consensus.ChainHeaderReader, block *types.Block, res
}
// For 0-period chains, refuse to seal empty blocks (no reward but would spin sealing)
if c.config.Period == 0 && len(block.Transactions()) == 0 {
log.Info("Sealing paused, waiting for transactions")
return nil
return errors.New("sealing paused while waiting for transactions")
}
// Don't hold the signer fields for the entire sealing procedure
c.lock.RLock()
Expand All @@ -621,8 +620,7 @@ func (c *Clique) Seal(chain consensus.ChainHeaderReader, block *types.Block, res
if recent == signer {
// Signer is among recents, only wait if the current block doesn't shift it out
if limit := uint64(len(snap.Signers)/2 + 1); number < limit || seen > number-limit {
log.Info("Signed recently, must wait for others")
return nil
return errors.New("signed recently, must wait for others")
}
}
}
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3 changes: 3 additions & 0 deletions miner/worker.go
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Expand Up @@ -593,6 +593,9 @@ func (w *worker) taskLoop() {

if err := w.engine.Seal(w.chain, task.block, w.resultCh, stopCh); err != nil {
log.Warn("Block sealing failed", "err", err)
w.pendingMu.Lock()
delete(w.pendingTasks, sealHash)
w.pendingMu.Unlock()
}
case <-w.exitCh:
interrupt()
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