danny0405 commented on code in PR #8837:
URL: https://github.com/apache/hudi/pull/8837#discussion_r1223859381
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hudi-client/hudi-client-common/src/main/java/org/apache/hudi/metadata/HoodieBackedTableMetadataWriter.java:
##########
@@ -851,26 +919,49 @@ public void update(HoodieRestoreMetadata restoreMetadata,
String instantTime) {
*/
@Override
public void update(HoodieRollbackMetadata rollbackMetadata, String
instantTime) {
- if (enabled && metadata != null) {
- // Is this rollback of an instant that has been synced to the metadata
table?
- String rollbackInstant = rollbackMetadata.getCommitsRollback().get(0);
- boolean wasSynced =
metadataMetaClient.getActiveTimeline().containsInstant(new HoodieInstant(false,
HoodieTimeline.DELTA_COMMIT_ACTION, rollbackInstant));
- if (!wasSynced) {
- // A compaction may have taken place on metadata table which would
have included this instant being rolled back.
- // Revisit this logic to relax the compaction fencing :
https://issues.apache.org/jira/browse/HUDI-2458
- Option<String> latestCompaction = metadata.getLatestCompactionTime();
- if (latestCompaction.isPresent()) {
- wasSynced = HoodieTimeline.compareTimestamps(rollbackInstant,
HoodieTimeline.LESSER_THAN_OR_EQUALS, latestCompaction.get());
- }
+ // The commit which is being rolled back on the dataset
+ final String commitInstantTime =
rollbackMetadata.getCommitsRollback().get(0);
+ // Find the deltacommits since the last compaction
+ Option<Pair<HoodieTimeline, HoodieInstant>> deltaCommitsInfo =
+
CompactionUtils.getDeltaCommitsSinceLatestCompaction(metadataMetaClient.getActiveTimeline());
+ if (!deltaCommitsInfo.isPresent()) {
+ LOG.info(String.format("Ignoring rollback of instant %s at %s since
there are no deltacommits on MDT", commitInstantTime, instantTime));
+ return;
+ }
+
+ // This could be a compaction or deltacommit instant (See
CompactionUtils.getDeltaCommitsSinceLatestCompaction)
+ HoodieInstant compactionInstant = deltaCommitsInfo.get().getValue();
+ HoodieTimeline deltacommitsSinceCompaction =
deltaCommitsInfo.get().getKey();
+
+ // The deltacommit that will be rolled back
+ HoodieInstant deltaCommitInstant = new HoodieInstant(false,
HoodieTimeline.DELTA_COMMIT_ACTION, commitInstantTime);
+
+ // The commit being rolled back should not be older than the latest
compaction on the MDT. Compaction on MDT only occurs when all actions
+ // are completed on the dataset. Hence, this case implies a rollback of
completed commit which should actually be handled using restore.
+ if (compactionInstant.getAction().equals(HoodieTimeline.COMMIT_ACTION)) {
+ final String compactionInstantTime = compactionInstant.getTimestamp();
+ if (HoodieTimeline.LESSER_THAN_OR_EQUALS.test(commitInstantTime,
compactionInstantTime)) {
+ throw new HoodieMetadataException(String.format("Commit being rolled
back %s is older than the latest compaction %s. "
+ + "There are %d deltacommits after this compaction: %s",
commitInstantTime, compactionInstantTime,
+ deltacommitsSinceCompaction.countInstants(),
deltacommitsSinceCompaction.getInstants()));
}
+ }
- Map<MetadataPartitionType, HoodieData<HoodieRecord>> records =
- HoodieTableMetadataUtil.convertMetadataToRecords(engineContext,
metadataMetaClient.getActiveTimeline(),
- rollbackMetadata, getRecordsGenerationParams(), instantTime,
- metadata.getSyncedInstantTime(), wasSynced);
- commit(instantTime, records, false);
- closeInternal();
+ if (deltaCommitsInfo.get().getKey().containsInstant(deltaCommitInstant)) {
+ LOG.info("Rolling back MDT deltacommit " + commitInstantTime);
+ if (!getWriteClient().rollback(commitInstantTime, instantTime)) {
+ throw new HoodieMetadataException("Failed to rollback deltacommit at "
+ commitInstantTime);
+ }
+ } else {
+ LOG.info(String.format("Ignoring rollback of instant %s at %s since
there are no corresponding deltacommits on MDT",
+ commitInstantTime, instantTime));
}
+
+ // Rollback of MOR table may end up adding a new log file. So we need to
check for added files and add them to MDT
+ processAndCommit(instantTime, () ->
HoodieTableMetadataUtil.convertMetadataToRecords(engineContext,
metadataMetaClient.getActiveTimeline(),
+ rollbackMetadata, getRecordsGenerationParams(), instantTime,
+ metadata.getSyncedInstantTime(), true), false);
Review Comment:
Not sure why we perform the rollback again ~
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