Daniel Compton created KAFKA-1518:
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Summary: KafkaMetricsReporter prevents Kafka from starting if the
custom reporter throws an exception
Key: KAFKA-1518
URL: https://issues.apache.org/jira/browse/KAFKA-1518
Project: Kafka
Issue Type: Bug
Components: tools
Affects Versions: 0.8.1.1
Reporter: Daniel Compton
When Kafka starts up, it
[starts|https://github.com/apache/kafka/blob/0.8.1/core/src/main/scala/kafka/metrics/KafkaMetricsReporter.scala#L60]
custom metrics reporters. If any of these throw an exception on startup then
this will block Kafka from starting.
For example using
[kafka-riemann-reporter|https://github.com/pingles/kafka-riemann-reporter], if
Riemann is not available then it will throw an [IO
Exception|https://github.com/pingles/kafka-riemann-reporter/issues/1] which
isn't caught by KafkaMetricsReporter. This means that Kafka will fail to start
until it can connect to Riemann, coupling a HA system to a non HA system.
It would probably be better to log the error and perhaps have a callback hook
to the reporter where they can handle it and startup in the background.
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