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Added a timeout to state regeneration (Consensys#8097)
Added a development flag to allow us to set state regeneration timeout, with a 120 second timeout by default, and a tiny bit of sanity around the flag not being less than 1. Signed-off-by: Paul Harris <[email protected]>
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110 changes: 110 additions & 0 deletions
110
storage/src/main/java/tech/pegasys/teku/storage/server/state/StateCacheLoader.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| /* | ||
| * Copyright Consensys Software Inc., 2024 | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on | ||
| * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations under the License. | ||
| */ | ||
|
|
||
| package tech.pegasys.teku.storage.server.state; | ||
|
|
||
| import static tech.pegasys.teku.infrastructure.unsigned.UInt64.ONE; | ||
|
|
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| import com.google.common.cache.CacheLoader; | ||
| import java.util.Optional; | ||
| import java.util.concurrent.ExecutionException; | ||
| import java.util.concurrent.TimeUnit; | ||
| import java.util.concurrent.TimeoutException; | ||
| import java.util.stream.Stream; | ||
| import org.apache.logging.log4j.LogManager; | ||
| import org.apache.logging.log4j.Logger; | ||
| import tech.pegasys.teku.dataproviders.generators.StreamingStateRegenerator; | ||
| import tech.pegasys.teku.infrastructure.async.SafeFuture; | ||
| import tech.pegasys.teku.infrastructure.unsigned.UInt64; | ||
| import tech.pegasys.teku.spec.Spec; | ||
| import tech.pegasys.teku.spec.datastructures.blocks.SignedBeaconBlock; | ||
| import tech.pegasys.teku.spec.datastructures.state.beaconstate.BeaconState; | ||
| import tech.pegasys.teku.storage.server.Database; | ||
|
|
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| class StateCacheLoader extends CacheLoader<UInt64, BeaconState> { | ||
| private static final Logger LOG = LogManager.getLogger(); | ||
| private final int stateRebuildTimeoutSeconds; | ||
| private final Database database; | ||
| private final long maxRegenerateSlots; | ||
| private final FinalizedStateCache finalizedStateCache; | ||
| private final Spec spec; | ||
|
|
||
| StateCacheLoader( | ||
| final Spec spec, | ||
| final Database database, | ||
| final int stateRebuildTimeoutSeconds, | ||
| final long maxRegenerateSlots, | ||
| final FinalizedStateCache finalizedStateCache) { | ||
| this.database = database; | ||
| this.stateRebuildTimeoutSeconds = stateRebuildTimeoutSeconds; | ||
| this.maxRegenerateSlots = maxRegenerateSlots; | ||
| this.finalizedStateCache = finalizedStateCache; | ||
| this.spec = spec; | ||
| } | ||
|
|
||
| @Override | ||
| public BeaconState load(final UInt64 key) { | ||
| return regenerateState(key).orElseThrow(FinalizedStateCache.StateUnavailableException::new); | ||
| } | ||
|
|
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| private Optional<BeaconState> regenerateState(final UInt64 slot) { | ||
| final Optional<BeaconState> maybeState = database.getLatestAvailableFinalizedState(slot); | ||
| if (maybeState.isEmpty()) { | ||
| return Optional.empty(); | ||
| } | ||
| final BeaconState state = maybeState.get(); | ||
| try { | ||
| return Optional.of( | ||
| regenerateStateWithinReasonableTime(slot, state) | ||
| .get(stateRebuildTimeoutSeconds, TimeUnit.SECONDS)); | ||
| } catch (ExecutionException | InterruptedException e) { | ||
| LOG.warn("Failed to regenerate state for slot {}", slot, e); | ||
| return Optional.empty(); | ||
| } catch (TimeoutException e) { | ||
| LOG.error( | ||
| "Timed out trying to regenerate state at slot {} starting from slot {} within {} seconds", | ||
| slot, | ||
| state.getSlot(), | ||
| stateRebuildTimeoutSeconds); | ||
| return Optional.empty(); | ||
| } | ||
| } | ||
|
|
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| private SafeFuture<BeaconState> regenerateStateWithinReasonableTime( | ||
| final UInt64 slot, final BeaconState stateFromDisk) { | ||
| final Optional<BeaconState> latestStateFromCache = | ||
| finalizedStateCache.getLatestStateFromCache(slot); | ||
| final BeaconState preState = | ||
| latestStateFromCache | ||
| .filter( | ||
| stateFromCache -> stateFromCache.getSlot().compareTo(stateFromDisk.getSlot()) >= 0) | ||
| .orElse(stateFromDisk); | ||
| if (preState.getSlot().equals(slot)) { | ||
| return SafeFuture.completedFuture(preState); | ||
| } | ||
| final long regenerateSlotCount = slot.minusMinZero(stateFromDisk.getSlot()).longValue(); | ||
| LOG.trace("Slots to regenerate state from: {}", regenerateSlotCount); | ||
| if (regenerateSlotCount > maxRegenerateSlots) { | ||
| LOG.error( | ||
| "Refusing to regenerate a state that is {} slots from what we have stored", | ||
| regenerateSlotCount); | ||
| return SafeFuture.failedFuture(new FinalizedStateCache.StateUnavailableException()); | ||
| } | ||
| try (final Stream<SignedBeaconBlock> blocks = | ||
| database.streamFinalizedBlocks(preState.getSlot().plus(ONE), slot)) { | ||
| final BeaconState state = StreamingStateRegenerator.regenerate(spec, preState, blocks); | ||
| finalizedStateCache.getAvailableSlots().add(state.getSlot()); | ||
| return SafeFuture.completedFuture(state); | ||
| } | ||
| } | ||
| } |
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