showuon commented on code in PR #13561:
URL: https://github.com/apache/kafka/pull/13561#discussion_r1209013637
##########
core/src/main/java/kafka/log/remote/RemoteLogManager.java:
##########
@@ -618,6 +629,192 @@ public void run() {
}
}
+ public void handleLogStartOffsetUpdate(TopicPartition topicPartition,
long remoteLogStartOffset) {
+ logger.debug("Updating {} with remoteLogStartOffset: {}",
topicPartition, remoteLogStartOffset);
+ updateRemoteLogStartOffset.accept(topicPartition,
remoteLogStartOffset);
+ }
+
+ class RemoteLogRetentionHandler {
+
+ private long remainingBreachedSize;
+ private OptionalLong logStartOffset = OptionalLong.empty();
+
+ public RemoteLogRetentionHandler(long remainingBreachedSize) {
+ this.remainingBreachedSize = remainingBreachedSize;
+ }
+
+ private boolean
deleteRetentionSizeBreachedSegments(RemoteLogSegmentMetadata metadata, boolean
checkSizeRetention, long retentionSize) throws RemoteStorageException,
ExecutionException, InterruptedException {
+ boolean isSegmentDeleted = deleteRemoteLogSegment(metadata, x
-> {
+ // Assumption that segments contain size > 0
+ if (checkSizeRetention && remainingBreachedSize > 0) {
+ remainingBreachedSize -= x.segmentSizeInBytes();
+ return remainingBreachedSize >= 0;
+ } else return false;
+ });
+ if (isSegmentDeleted) {
+ logStartOffset = OptionalLong.of(metadata.endOffset() + 1);
+ logger.info("Deleted remote log segment {} due to
retention size {} breach. Log size after deletion will be {}.",
+ metadata.remoteLogSegmentId(), retentionSize,
remainingBreachedSize + retentionSize);
+ }
+ return isSegmentDeleted;
+ }
+
+ private boolean
deleteLogStartOffsetBreachedSegments(RemoteLogSegmentMetadata metadata, long
startOffset)
+ throws RemoteStorageException, ExecutionException,
InterruptedException {
+ boolean isSegmentDeleted = deleteRemoteLogSegment(metadata, x
-> startOffset > x.endOffset());
+ if (isSegmentDeleted) {
+ remainingBreachedSize = Math.max(0, remainingBreachedSize
- metadata.segmentSizeInBytes());
+ logger.info("Deleted remote log segment {} due to log
start offset {} breach", metadata.remoteLogSegmentId(), startOffset);
+ }
+
+ // No need to update the logStartOffset.
+ return isSegmentDeleted;
+ }
+
+ // There are two cases:
+ // 1) When there are offline partitions and a new replica with
empty disk is brought as leader, then the
+ // leader-epoch gets bumped but the log-start-offset gets
truncated back to 0.
+ // 2) To remove the unreferenced segments.
+ private boolean
deleteLogSegmentsDueToLeaderEpochCacheTruncation(EpochEntry earliestEpochEntry,
RemoteLogSegmentMetadata metadata) throws RemoteStorageException,
ExecutionException, InterruptedException {
+ boolean isSegmentDeleted = deleteRemoteLogSegment(metadata, x
->
+
x.segmentLeaderEpochs().keySet().stream().allMatch(epoch -> epoch <
earliestEpochEntry.epoch));
+ if (isSegmentDeleted) {
+ logger.info("Deleted remote log segment {} due to leader
epoch cache truncation. Current earliest epoch: {}, segmentEndOffset: {} and
segmentEpochs: {}",
+ metadata.remoteLogSegmentId(), earliestEpochEntry,
metadata.endOffset(), metadata.segmentLeaderEpochs().keySet());
+ }
+
+ // No need to update the log-start-offset as these
epochs/offsets are earlier to that value.
+ return isSegmentDeleted;
+ }
+
+ private boolean deleteRemoteLogSegment(RemoteLogSegmentMetadata
segmentMetadata, Predicate<RemoteLogSegmentMetadata> predicate)
+ throws RemoteStorageException, ExecutionException,
InterruptedException {
+ if (predicate.test(segmentMetadata)) {
+ // Publish delete segment started event.
+ remoteLogMetadataManager.updateRemoteLogSegmentMetadata(
+ new
RemoteLogSegmentMetadataUpdate(segmentMetadata.remoteLogSegmentId(),
time.milliseconds(),
+
RemoteLogSegmentState.DELETE_SEGMENT_STARTED, brokerId)).get();
+
+ // Delete the segment in remote storage.
+
remoteLogStorageManager.deleteLogSegmentData(segmentMetadata);
+
+ // Publish delete segment finished event.
+ remoteLogMetadataManager.updateRemoteLogSegmentMetadata(
+ new
RemoteLogSegmentMetadataUpdate(segmentMetadata.remoteLogSegmentId(),
time.milliseconds(),
+
RemoteLogSegmentState.DELETE_SEGMENT_FINISHED, brokerId)).get();
+ return true;
+ } else {
+ return false;
+ }
+ }
+
+ public boolean
deleteRetentionTimeBreachedSegments(RemoteLogSegmentMetadata metadata,
+ boolean
checkTimestampRetention,
+ long cleanupTs,
+ long
retentionMs)
+ throws RemoteStorageException, ExecutionException,
InterruptedException {
+ boolean isSegmentDeleted = deleteRemoteLogSegment(metadata,
+ x -> checkTimestampRetention && x.maxTimestampMs() <=
cleanupTs);
+ if (isSegmentDeleted) {
+ remainingBreachedSize = Math.max(0, remainingBreachedSize
- metadata.segmentSizeInBytes());
+ // It is fine to have logStartOffset as
`metadata.endOffset() + 1` as the segment offset intervals
+ // are ascending with in an epoch.
+ logStartOffset = OptionalLong.of(metadata.endOffset() + 1);
+ logger.info("Deleted remote log segment {} due to
retention time " +
+ "{}ms breach based on the largest record timestamp
in the segment", metadata.remoteLogSegmentId(), retentionMs);
+ }
+ return isSegmentDeleted;
+ }
+ }
+
+ private void cleanupExpiredRemoteLogSegments() throws
RemoteStorageException, ExecutionException, InterruptedException {
+ if (isCancelled())
+ return;
+
+ // Cleanup remote log segments and update the log start offset if
applicable.
+ final Iterator<RemoteLogSegmentMetadata> segmentMetadataIter =
remoteLogMetadataManager.listRemoteLogSegments(topicIdPartition);
+ if (!segmentMetadataIter.hasNext()) {
+ return;
+ }
+
+ final Optional<UnifiedLog> logOptional =
fetchLog.apply(topicIdPartition.topicPartition());
+ if (!logOptional.isPresent()) {
+ return;
+ }
+
+ final UnifiedLog log = logOptional.get();
+ final Option<LeaderEpochFileCache> leaderEpochCacheOption =
log.leaderEpochCache();
+ if (leaderEpochCacheOption.isEmpty()) {
+ return;
+ }
+
+ final long retentionMs = log.config().retentionMs;
+
+ // Iterate once
+ // - to build the log size of segments with base-offset <
local-log-start-offset
+ // - to collect all the epochs of remote log segments
+ // These values can be cached and updated in RLMTask for this
topic partition without computing in each
+ // iteration. But the logic can become little complex and need to
cover different scenarios to avoid any
+ // leaks. We can have a followup to improve it by maintaining
these values through both copying and deletion.
+ final Set<Integer> epochsSet = new HashSet<>();
+ long totalSizeEarlierToLocalLogStartOffset = 0L;
+ while (segmentMetadataIter.hasNext()) {
+ RemoteLogSegmentMetadata segmentMetadata =
segmentMetadataIter.next();
+
epochsSet.addAll(segmentMetadata.segmentLeaderEpochs().keySet());
+
+ if (segmentMetadata.endOffset() < log.localLogStartOffset()) {
+ totalSizeEarlierToLocalLogStartOffset +=
segmentMetadata.segmentSizeInBytes();
+ }
+ }
+
+ // This is the total size of segments in local log that have their
base-offset > local-log-start-offset
+ // and size of the segments in remote storage which have their
end-offset < local-log-start-offset.
+ long totalSize = log.validLocalLogSegmentsSize() +
totalSizeEarlierToLocalLogStartOffset;
+
+ // All the leader epochs in sorted order that exists in remote
storage
+ List<Integer> remoteLeaderEpochs = new ArrayList<>(epochsSet);
+ Collections.sort(remoteLeaderEpochs);
+
+ long remainingBreachedSize = totalSize -
log.config().retentionSize;
+
+ RemoteLogRetentionHandler remoteLogRetentionHandler = new
RemoteLogRetentionHandler(remainingBreachedSize);
+
+ boolean checkTimestampRetention = retentionMs > -1;
+ long cleanupTs = time.milliseconds() - retentionMs;
+ boolean checkSizeRetention = log.config().retentionSize > -1;
+ LeaderEpochFileCache leaderEpochCache =
leaderEpochCacheOption.get();
+ Iterator<EpochEntry> epochEntryIterator =
leaderEpochCache.epochEntries().iterator();
+ boolean isSegmentDeleted = true;
+ while (isSegmentDeleted && epochEntryIterator.hasNext()) {
+ EpochEntry epochEntry = epochEntryIterator.next();
+ Iterator<RemoteLogSegmentMetadata> segmentsIterator =
remoteLogMetadataManager.listRemoteLogSegments(topicIdPartition,
epochEntry.epoch);
+ while (isSegmentDeleted && segmentsIterator.hasNext()) {
+ RemoteLogSegmentMetadata metadata =
segmentsIterator.next();
+ isSegmentDeleted =
+
remoteLogRetentionHandler.deleteRetentionTimeBreachedSegments(metadata,
checkTimestampRetention, cleanupTs, retentionMs) ||
+
remoteLogRetentionHandler.deleteRetentionSizeBreachedSegments(metadata,
checkSizeRetention, log.config().retentionSize) ||
+
remoteLogRetentionHandler.deleteLogStartOffsetBreachedSegments(metadata,
log.logStartOffset());
+ }
+ }
+
+ // Remove the remote log segments whose segment-leader-epochs are
lesser than the earliest-epoch known
Review Comment:
nit: less than
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
