Gian Merlino created KAFKA-1866:
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Summary: LogStartOffset gauge throws exceptions after log.delete()
Key: KAFKA-1866
URL: https://issues.apache.org/jira/browse/KAFKA-1866
Project: Kafka
Issue Type: Bug
Reporter: Gian Merlino
The LogStartOffset gauge does "logSegments.head.baseOffset", which throws
NoSuchElementException on an empty list, which can occur after a delete() of
the log. This makes life harder for custom MetricsReporters, since they have to
deal with .value() possibly throwing an exception.
Locally we're dealing with this by having Log.delete() also call removeMetric
on all the gauges. That also has the benefit of not having a bunch of metrics
floating around for logs that the broker is not actually handling.
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