gardnervickers commented on a change in pull request #10896:
URL: https://github.com/apache/kafka/pull/10896#discussion_r656296678
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File path: core/src/main/scala/kafka/log/ProducerStateManager.scala
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@@ -828,15 +834,50 @@ class ProducerStateManager(val topicPartition:
TopicPartition,
* Removes the producer state snapshot file metadata corresponding to the
provided offset if it exists from this
* ProducerStateManager, and deletes the backing snapshot file.
*/
- private[log] def removeAndDeleteSnapshot(snapshotOffset: Long): Unit = {
+ private def removeAndDeleteSnapshot(snapshotOffset: Long): Unit = {
Option(snapshots.remove(snapshotOffset)).foreach(_.deleteIfExists())
}
+
+ /**
+ * Removes the producer state snapshot file metadata corresponding to the
provided offset if it exists from this
+ * ProducerStateManager, and renames the backing snapshot file to have the
Log.DeletionSuffix.
+ *
+ * Note: This method is safe to use with async deletes. If a race occurs and
the snapshot file
+ * is deleted without this ProducerStateManager instance knowing, the
resulting exception on
+ * SnapshotFile rename will be ignored and None will be returned.
+ */
+ private[log] def removeAndMarkSnapshotForDeletion(snapshotOffset: Long):
Option[SnapshotFile] = {
+ Option(snapshots.remove(snapshotOffset)).flatMap { snapshot => {
+ // If the file cannot be renamed, it likely means that the file was
deleted already.
+ // This can happen due to the way we construct an intermediate producer
state manager
+ // during log recovery, and use it to issue deletions prior to creating
the "real"
+ // producer state manager.
+ //
+ // In any case, removeAndMarkSnapshotForDeletion is intended to be used
for snapshot file
+ // deletion, so ignoring the exception here just means that the intended
operation was
+ // already completed.
+ try {
+ snapshot.renameTo(Log.DeletedFileSuffix)
+ } catch {
+ case _: NoSuchFileException =>
+ return None
Review comment:
Sure we can do that.
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