Tomonari Yamashita created KAFKA-13996: ------------------------------------------
Summary: log.cleaner.io.max.bytes.per.second cannot be changed dynamically Key: KAFKA-13996 URL: https://issues.apache.org/jira/browse/KAFKA-13996 Project: Kafka Issue Type: Bug Components: config, core, log cleaner Affects Versions: 3.2.0 Reporter: Tomonari Yamashita Assignee: Tomonari Yamashita - log.cleaner.io.max.bytes.per.second cannot be changed dynamically using bin/kafka-configs.sh - Reproduction procedure: -# Create a topic with cleanup.policy=compact {code:java} bin/kafka-topics.sh --bootstrap-server localhost:9092 --create --replication-factor 1 --partitions 1 --topic my-topic --config cleanup.policy=compact --config cleanup.policy=compact --config segment.bytes=104857600 --config compression.type=producer {code} -# Change log.cleaner.io.max.bytes.per.second=10485760 using bin/kafka-configs.sh {code:java} bin/kafka-configs.sh --bootstrap-server localhost:9092 --entity-type brokers --entity-default --alter --add-config log.cleaner.io.max.bytes.per.second=10485760 {code} -# Send enough messages(> segment.bytes=104857600) to activate Log Cleaner -# logs/log-cleaner.log, configuration by log.cleaner.io.max.bytes.per.second=10485760 is not reflected and Log Cleaner does not slow down (>= log.cleaner.io.max.bytes.per.second=10485760). {code:java} [2022-06-15 14:52:14,988] INFO [kafka-log-cleaner-thread-0]: Log cleaner thread 0 cleaned log my-topic-0 (dirty section = [39786, 81666]) 3,999.0 MB of log processed in 2.7 seconds (1,494.4 MB/sec). Indexed 3,998.9 MB in 0.9 seconds (4,218.2 Mb/sec, 35.4% of total time) Buffer utilization: 0.0% Cleaned 3,999.0 MB in 1.7 seconds (2,314.2 Mb/sec, 64.6% of total time) Start size: 3,999.0 MB (41,881 messages) End size: 0.1 MB (1 messages) 100.0% size reduction (100.0% fewer messages) (kafka.log.LogCleaner) {code} - Problem cause: -- log.cleaner.io.max.bytes.per.second is used in Throttler in LogCleaner, however, it is only passed to Throttler at initialization time. --- https://github.com/apache/kafka/blob/4380eae7ceb840dd93fee8ec90cd89a72bad7a3f/core/src/main/scala/kafka/log/LogCleaner.scala#L107-L112 -- Need to change Throttler configuration value at reconfigure() of LogCleaner. --- https://github.com/apache/kafka/blob/4380eae7ceb840dd93fee8ec90cd89a72bad7a3f/core/src/main/scala/kafka/log/LogCleaner.scala#L192-L196 - A workaround is that restarting every broker adding log.cleaner.io.max.bytes.per.second to config/server.properties -- This message was sent by Atlassian Jira (v8.20.7#820007)