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https://issues.apache.org/jira/browse/KAFKA-1866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14316572#comment-14316572
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Sriharsha Chintalapani commented on KAFKA-1866:
-----------------------------------------------
Updated reviewboard https://reviews.apache.org/r/30084/diff/
against branch origin/trunk
> 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
> Assignee: Sriharsha Chintalapani
> Attachments: KAFKA-1866.patch, KAFKA-1866_2015-02-10_22:50:09.patch,
> KAFKA-1866_2015-02-11_09:25:33.patch
>
>
> 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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