kirktrue commented on code in PR #13623:
URL: https://github.com/apache/kafka/pull/13623#discussion_r1180722737
##########
core/src/main/scala/kafka/log/LogCleaner.scala:
##########
@@ -167,8 +167,20 @@ class LogCleaner(initialConfig: CleanerConfig,
*/
def shutdown(): Unit = {
info("Shutting down the log cleaner.")
- cleaners.foreach(_.shutdown())
- cleaners.clear()
+ try {
+ cleaners.foreach(_.shutdown())
+ cleaners.clear()
+ } finally {
+ remoteMetrics()
+ }
+ }
+
+ def remoteMetrics(): Unit = {
Review Comment:
Should this method name be `removeMetrics` (a `v` instead of a `t`)?
##########
core/src/main/scala/kafka/log/LogCleaner.scala:
##########
@@ -167,8 +167,20 @@ class LogCleaner(initialConfig: CleanerConfig,
*/
def shutdown(): Unit = {
info("Shutting down the log cleaner.")
- cleaners.foreach(_.shutdown())
- cleaners.clear()
+ try {
+ cleaners.foreach(_.shutdown())
+ cleaners.clear()
+ } finally {
+ remoteMetrics()
+ }
+ }
+
+ def remoteMetrics(): Unit = {
+ metricsGroup.removeMetric("max-buffer-utilization-percent")
+ metricsGroup.removeMetric("cleaner-recopy-percent")
+ metricsGroup.removeMetric("max-clean-time-secs")
+ metricsGroup.removeMetric("max-compaction-delay-secs")
+ metricsGroup.removeMetric("DeadThreadCount")
Review Comment:
I had a similar thought. Calling them out together as constants could also
remind future contributors that might add a metric that they need to remove the
metric too.
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