HeartSaVioR commented on a change in pull request #31495: URL: https://github.com/apache/spark/pull/31495#discussion_r571870795
########## File path: sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/HDFSMetadataLog.scala ########## @@ -239,18 +239,35 @@ class HDFSMetadataLog[T <: AnyRef : ClassTag](sparkSession: SparkSession, path: .reverse } + private var lastPurgedBatchId: Long = -1L + /** * Removes all the log entry earlier than thresholdBatchId (exclusive). */ override def purge(thresholdBatchId: Long): Unit = { - val batchIds = fileManager.list(metadataPath, batchFilesFilter) - .map(f => pathToBatchId(f.getPath)) - - for (batchId <- batchIds if batchId < thresholdBatchId) { - val path = batchIdToPath(batchId) - fileManager.delete(path) - logTrace(s"Removed metadata log file: $path") + val possibleTargetBatchIds = (lastPurgedBatchId + 1 until thresholdBatchId) + if (possibleTargetBatchIds.length <= 3) { + // avoid using list if we only need to purge at most 3 elements + possibleTargetBatchIds.foreach { batchId => + val path = batchIdToPath(batchId) + if (fileManager.exists(path)) { Review comment: Ahh... there's a roadblock on the details - FileSystemBasedCheckpointFileManager.delete logs INFO message when the file doesn't exist. FileContextBasedCheckpointFileManager.delete doesn't log any message though. Probably OK to remove INFO message on FileSystemBasedCheckpointFileManager.delete as FileSystemBasedCheckpointFileManager is used as a fail-back of FileContextBasedCheckpointFileManager (especially Spark logs warn message when failing back) and FileContextBasedCheckpointFileManager covers the major usage. ---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org