Azhar Ahmed created KAFKA-18637:
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Summary: Dynamic override for max.connections.per.ip is not honored
Key: KAFKA-18637
URL: https://issues.apache.org/jira/browse/KAFKA-18637
Project: Kafka
Issue Type: Bug
Components: config
Reporter: Azhar Ahmed
After dynamically modifying the max.connections.per.ip configuration from 1000
to 10000, the update initially worked as expected. However, after multiple
broker restarts, the value reverted to 1000, leading to numerous connection
closures.
This issue occurs because the max.connections.per.ip and
max.connections.per.ip.override configurations are defined using val. As a
result, the values set in server.properties are assigned at initialization, and
the KafkaConfig reference used by SocketServer continues to hold the initial
static value.
Client Logs when multiple perf producer clients are started on the same machine
{code:java}
2025-01-24 02:17:02,953] WARN [Producer clientId=perf-producer-client]
Bootstrap broker <Bootstrap broker URL>:9092 (id: -1 rack: null) disconnected
(org.apache.kafka.clients.NetworkClient)
[2025-01-24 02:17:04,008] WARN [Producer clientId=perf-producer-client]
Bootstrap broker <Bootstrap broker URL>:9092 (id: -1 rack: null) disconnected
(org.apache.kafka.clients.NetworkClient)
[2025-01-24 02:17:04,912] WARN [Producer clientId=perf-producer-client]
Bootstrap broker <Bootstrap broker URL>:9092 (id: -1 rack: null) disconnected
{code}
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