Kafka Broker Keeps Restarting? Common Causes and Solutions

5 views 0 May 7, 2025 admin

A Kafka broker restarting continuously is a sign of critical misconfigurations or runtime failures.

šŸ”„ Common Causes

  • Corrupted data in log.dirs
  • Port conflict on 9092
  • Incorrect zookeeper.connect
  • Heap OutOfMemoryError
  • Missing Java or mismatched JDK version

šŸ› ļø How to Fix

  • Check logs:
/var/log/kafka/server.log
  • Delete corrupted topic logs (if necessary):
rm -rf /tmp/kafka-logs/<topic-name>/
  • Increase Xmx in KAFKA_HEAP_OPTS
  • Use jstack to debug JVM hangs
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