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https://issues.apache.org/jira/browse/HDFS-8681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14604941#comment-14604941
]
Hudson commented on HDFS-8681:
------------------------------
FAILURE: Integrated in Hadoop-trunk-Commit #8080 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/8080/])
HDFS-8681. BlockScanner is incorrectly disabled by default. (Contributed by
Arpit Agarwal) (arp: rev c6793dd8cc69ea994eb23c3e1349efe4b9feca9a)
* hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockScanner.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/TestFsDatasetImpl.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
> BlockScanner is incorrectly disabled by default
> -----------------------------------------------
>
> Key: HDFS-8681
> URL: https://issues.apache.org/jira/browse/HDFS-8681
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Affects Versions: 2.7.0
> Reporter: Andrew Wang
> Assignee: Arpit Agarwal
> Priority: Blocker
> Fix For: 2.7.1
>
> Attachments: HDFS-8681.01.patch, HDFS-8681.02.patch,
> HDFS-8681.03.patch, HDFS-8681.04.patch
>
>
> 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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