How do I kill the process using port 9092?

On macOS & Linux, run: "kill -9 $(lsof -t -i:9092)". On Windows PowerShell (as Admin), run: "Stop-Process -Id (Get-NetTCPConnection -LocalPort 9092).OwningProcess -Force".

Why am I getting "port 9092 already in use" (EADDRINUSE)?

This occurs when another background instance of java, kafka or a zombie process is already bound to port 9092. Use the kill commands above to free the port immediately.

Messaging & Cache

Risk: High

Port 9092 — Apache Kafka Broker

Q: Is Port 9092 safe to expose to the public internet?

Risk level is High. Ensure SASL/SCRAM or mTLS authentication is enabled (`listeners=SASL_PLAINTEXT://:9092` or `SSL://:9092`).

Port 9092 is the default port for Apache Kafka distributed event streaming brokers.

PORT NUMBER

9092

PROTOCOL

TCP

DEFAULT PROCESS

java, kafka

FIREWALL TARGET

9092/tcp

Instant Terminal Fixes for Port 9092

macOS & Linux Terminal

1. Check who is listening on port 9092:

sudo ss -tulpn | grep 9092

2. Kill process occupying port 9092 (EADDRINUSE fix):

kill -9 $(lsof -t -i:9092)

3. UFW Firewall Allow rule:

sudo ufw allow from 10.0.0.0/8 to any port 9092 proto tcp

Windows PowerShell (Admin)

1. Check listening port:

Get-NetTCPConnection -LocalPort 9092

2. Force kill process on port 9092:

Stop-Process -Id (Get-NetTCPConnection -LocalPort 9092).OwningProcess -Force

3. Docker Port Forwarding Mapping:

docker run -p 9092:9092 -d apache/kafka:latest

Common Error Encountered

org.apache.kafka.common.errors.TimeoutException: Failed to update metadata after 60000 ms (port 9092)

Security Advisory & Hardening

Ensure SASL/SCRAM or mTLS authentication is enabled (`listeners=SASL_PLAINTEXT://:9092` or `SSL://:9092`).

Frequently Asked Questions

Port 9092 Questions & Answers

Common questions regarding default services, kill commands, and firewall configurations.

Port 9092 is commonly used for Apache Kafka Broker. Port 9092 is the default port for Apache Kafka distributed event streaming brokers.

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