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https://issues.apache.org/jira/browse/HDFS-8681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14603754#comment-14603754
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Arpit Agarwal edited comment on HDFS-8681 at 6/26/15 11:08 PM:
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Hi [~andrew.wang] does this mean the block scanner is not on by default in
2.7.x. If so it should be a blocker for 2.7.1.
was (Author: arpitagarwal):
If this means that the block scanner is not running by default in 2.7.x then it
should be a blocker for 2.7.1. Changing Target Version/Priority.
> BlockScanner is incorrectly disabled by default
> -----------------------------------------------
>
> Key: HDFS-8681
> URL: https://issues.apache.org/jira/browse/HDFS-8681
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.7.0
> Reporter: Andrew Wang
> Assignee: Colin Patrick McCabe
> Priority: Critical
>
> This code is used to check whether the block scanner is enabled:
> {noformat}
> public boolean isEnabled() {
> return (conf.scanPeriodMs) > 0 && (conf.targetBytesPerSec > 0);
> }
> {noformat}
> Unfortunately, when this was introduced, we did not change the default scan
> period's value of 0, which means by default the BlockScanner is disabled.
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