Konstantine Karantasis created KAFKA-5736: ---------------------------------------------
Summary: Improve error message in Connect when all kafka brokers are down Key: KAFKA-5736 URL: https://issues.apache.org/jira/browse/KAFKA-5736 Project: Kafka Issue Type: Bug Components: KafkaConnect Affects Versions: 0.11.0.0 Reporter: Konstantine Karantasis Assignee: Konstantine Karantasis Fix For: 0.11.0.1 Currently when all the Kafka brokers are down, Kafka Connect is failing with a pretty unintuitive message when it tries to, for instance, reconfigure tasks. Example output: {code:java} [2017-08-15 19:12:09,959] ERROR Failed to reconfigure connector's tasks, retrying after backoff: (org.apache.kafka.connect.runtime.distributed.DistributedHerder) java.lang.IllegalArgumentException: CircularIterator can only be used on non-empty lists at org.apache.kafka.common.utils.CircularIterator.<init>(CircularIterator.java:29) at org.apache.kafka.clients.consumer.RoundRobinAssignor.assign(RoundRobinAssignor.java:61) at org.apache.kafka.clients.consumer.internals.AbstractPartitionAssignor.assign(AbstractPartitionAssignor.java:68) at ... (connector code) at org.apache.kafka.connect.runtime.Worker.connectorTaskConfigs(Worker.java:230) {code} The error message needs to be improved, since its root cause is the absence kafka brokers for assignment. -- This message was sent by Atlassian JIRA (v6.4.14#64029)