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[HUDI-3624] Check all instants before starting a commit in metadata table (#5098)

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This commit is contained in:
Y Ethan Guo
2022-03-24 17:13:58 -07:00
committed by GitHub
parent 4ddd094ba2
commit 9b3dd2e0b7
4 changed files with 221 additions and 106 deletions
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32
hudi-client/hudi-flink-client/src/main/java/org/apache/hudi/metadata/FlinkHoodieBackedTableMetadataWriter.java
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@@ -18,7 +18,6 @@
package org.apache.hudi.metadata;
import org.apache.avro.specific.SpecificRecordBase;
import org.apache.hudi.client.HoodieFlinkWriteClient;
import org.apache.hudi.client.WriteStatus;
import org.apache.hudi.common.data.HoodieData;
@@ -33,6 +32,7 @@ import org.apache.hudi.common.util.ValidationUtils;
import org.apache.hudi.config.HoodieWriteConfig;
import org.apache.hudi.exception.HoodieMetadataException;
import org.apache.avro.specific.SpecificRecordBase;
import org.apache.hadoop.conf.Configuration;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
@@ -108,22 +108,28 @@ public class FlinkHoodieBackedTableMetadataWriter extends HoodieBackedTableMetad
List<HoodieRecord> preppedRecordList = HoodieList.getList(preppedRecords);
try (HoodieFlinkWriteClient writeClient = new HoodieFlinkWriteClient(engineContext, metadataWriteConfig)) {
if (!metadataMetaClient.getActiveTimeline().filterCompletedInstants().containsInstant(instantTime)) {
if (!metadataMetaClient.getActiveTimeline().containsInstant(instantTime)) {
// if this is a new commit being applied to metadata for the first time
writeClient.startCommitWithTime(instantTime);
metadataMetaClient.getActiveTimeline().transitionRequestedToInflight(HoodieActiveTimeline.DELTA_COMMIT_ACTION, instantTime);
} else {
// this code path refers to a re-attempted commit that got committed to metadata table, but failed in datatable.
// for eg, lets say compaction c1 on 1st attempt succeeded in metadata table and failed before committing to datatable.
// when retried again, data table will first rollback pending compaction. these will be applied to metadata table, but all changes
// are upserts to metadata table and so only a new delta commit will be created.
// once rollback is complete, compaction will be retried again, which will eventually hit this code block where the respective commit is
// already part of completed commit. So, we have to manually remove the completed instant and proceed.
// and it is for the same reason we enabled withAllowMultiWriteOnSameInstant for metadata table.
HoodieInstant alreadyCompletedInstant =
metadataMetaClient.getActiveTimeline().filterCompletedInstants().filter(entry -> entry.getTimestamp().equals(instantTime)).lastInstant().get();
HoodieActiveTimeline.deleteInstantFile(metadataMetaClient.getFs(), metadataMetaClient.getMetaPath(), alreadyCompletedInstant);
metadataMetaClient.reloadActiveTimeline();
Option<HoodieInstant> alreadyCompletedInstant = metadataMetaClient.getActiveTimeline().filterCompletedInstants().filter(entry -> entry.getTimestamp().equals(instantTime)).lastInstant();
if (alreadyCompletedInstant.isPresent()) {
// this code path refers to a re-attempted commit that got committed to metadata table, but failed in datatable.
// for eg, lets say compaction c1 on 1st attempt succeeded in metadata table and failed before committing to datatable.
// when retried again, data table will first rollback pending compaction. these will be applied to metadata table, but all changes
// are upserts to metadata table and so only a new delta commit will be created.
// once rollback is complete, compaction will be retried again, which will eventually hit this code block where the respective commit is
// already part of completed commit. So, we have to manually remove the completed instant and proceed.
// and it is for the same reason we enabled withAllowMultiWriteOnSameInstant for metadata table.
HoodieActiveTimeline.deleteInstantFile(metadataMetaClient.getFs(), metadataMetaClient.getMetaPath(), alreadyCompletedInstant.get());
metadataMetaClient.reloadActiveTimeline();
}
// If the alreadyCompletedInstant is empty, that means there is a requested or inflight
// instant with the same instant time. This happens for data table clean action which
// reuses the same instant time without rollback first. It is a no-op here as the
// clean plan is the same, so we don't need to delete the requested and inflight instant
// files in the active timeline.
}
List<WriteStatus> statuses = preppedRecordList.size() > 0