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Posted to dev@kafka.apache.org by "Sriharsha Chintalapani (JIRA)" <ji...@apache.org> on 2015/02/11 07:51:11 UTC
[jira] [Updated] (KAFKA-1866) LogStartOffset gauge throws
exceptions after log.delete()
[ https://issues.apache.org/jira/browse/KAFKA-1866?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sriharsha Chintalapani updated KAFKA-1866:
------------------------------------------
Attachment: KAFKA-1866_2015-02-10_22:50:09.patch
> 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
>
>
> 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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