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https://issues.apache.org/jira/browse/HADOOP-4228?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12633892#action_12633892
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Eric Yang commented on HADOOP-4228:
-----------------------------------
The failed test has no relationship to this patch. There is probably something
else committed to trunk which caused Balancer test failure.
> dfs datanode metrics, bytes_read, bytes_written overflows due to incorrect
> type used.
> -------------------------------------------------------------------------------------
>
> Key: HADOOP-4228
> URL: https://issues.apache.org/jira/browse/HADOOP-4228
> Project: Hadoop Core
> Issue Type: Bug
> Components: metrics
> Affects Versions: 0.18.2, 0.19.0
> Environment: Red Hat Enterprise Linux AS release 4 (Nahant Update 5),
> Java 1.6.
> Reporter: Eric Yang
> Assignee: Eric Yang
> Priority: Blocker
> Attachments: HADOOP-4228-trunk.patch, HADOOP-4228.patch
>
>
> bytes_read, and bytes_written metrics are using int (MetricsTimeVaryingInt)
> as counter. This type is too small to store the bytes_read and bytes_written
> metrics. Recommend to change this to long (metricsLongValue).
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