Kafka clients (producers and consumers) must first fetch cluster metadata — which broker leads each topic partition — before they can send or read. When a client cannot obtain that metadata within its timeout, it throws TimeoutException: Failed to update metadata. This stalls entire event pipelines and is almost always a connectivity or broker-advertisement problem, not a client bug.
📚 Want to understand the root cause and troubleshoot it step by step?
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🔗 https://devscampus.com/troubleshooting/kafka-timeoutexception-failed-to-update-metadata
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