hachikuji commented on a change in pull request #8850:
URL: https://github.com/apache/kafka/pull/8850#discussion_r438559177
##########
File path: core/src/main/scala/kafka/log/Log.scala
##########
@@ -1784,8 +1784,18 @@ class Log(@volatile private var _dir: File,
private def deleteRetentionMsBreachedSegments(): Int = {
if (config.retentionMs < 0) return 0
val startMs = time.milliseconds
- deleteOldSegments((segment, _) => startMs - segment.largestTimestamp >
config.retentionMs,
- reason = s"retention time ${config.retentionMs}ms breach")
+
+ def shouldDelete(segment: LogSegment, nextSegmentOpt: Option[LogSegment])
= {
+ if (startMs - segment.largestTimestamp > config.retentionMs) {
+ info(s"Segment with base offset ${segment.baseOffset} will be deleted
due to" +
Review comment:
`LogSegment.largestTimestamp` may refer to either the largest record
timestamp for newer formats or the last modified time of the segment for older
formats. I think it would be helpful if the log message indicated which case it
is. Perhaps we could add a method like this to `LogSegment`?
```scala
def largestRecordTimestamp: Option[Long]
```
##########
File path: core/src/main/scala/kafka/log/Log.scala
##########
@@ -1804,8 +1816,15 @@ class Log(@volatile private var _dir: File,
}
private def deleteLogStartOffsetBreachedSegments(): Int = {
- def shouldDelete(segment: LogSegment, nextSegmentOpt: Option[LogSegment]) =
- nextSegmentOpt.exists(_.baseOffset <= logStartOffset)
+ def shouldDelete(segment: LogSegment, nextSegmentOpt: Option[LogSegment])
= {
+ if (nextSegmentOpt.exists(_.baseOffset <= logStartOffset)) {
+ info (s"Segment with base offset ${segment.baseOffset} will be deleted
due to" +
Review comment:
nit: space after `info`
##########
File path: core/src/main/scala/kafka/log/Log.scala
##########
@@ -1784,8 +1784,18 @@ class Log(@volatile private var _dir: File,
private def deleteRetentionMsBreachedSegments(): Int = {
if (config.retentionMs < 0) return 0
val startMs = time.milliseconds
- deleteOldSegments((segment, _) => startMs - segment.largestTimestamp >
config.retentionMs,
- reason = s"retention time ${config.retentionMs}ms breach")
+
+ def shouldDelete(segment: LogSegment, nextSegmentOpt: Option[LogSegment])
= {
+ if (startMs - segment.largestTimestamp > config.retentionMs) {
+ info(s"Segment with base offset ${segment.baseOffset} will be deleted
due to" +
+ s" retentionMs breach. Largest timestamp of segment is
${segment.largestTimestamp}")
+ true
+ } else {
+ false
+ }
+ }
+
+ deleteOldSegments(shouldDelete, reason = s"retention time
${config.retentionMs}ms breach")
Review comment:
With the logging we have above, do you think we still need the message
in `deleteOldSegments`? Perhaps we could make it more concise at least. Maybe
just mention the number of segments to be deleted for example.
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