WARN [ReplicaFetcherThread-0-2], Error in fetch kafka.server.ReplicaFetcherThread$FetchRequest@3905d112 (kafka.server.ReplicaFetcherThread)
java.io.IOException: Connection to <server's IP address>:9092 (id: 2 rack: null) failed...Waiting for <number of servers> brokers to be available. ...Unable to connect to Kafka broker <server's IP address>
Improper network connectivity can lead to this issue. Active firewalls on one or more of the servers running Appian can prevent the servers from communicating with each other.
Check for active firewall rules or other network configuration which is preventing the servers from communicating with each other.
This article applies to all versions of Appian.
Last Reviewed: August 2018
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