[
https://issues.apache.org/jira/browse/HDFS-8659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14602173#comment-14602173
]
Colin Patrick McCabe commented on HDFS-8659:
--------------------------------------------
The if statements should not be necessary, for two reasons:
1. slf4j doesn't create new strings through concatenation unless the log is
enabled (this is ignoring things like the overhead of {{VolumeScanner#toString}}
2. These are not code paths we should hit often, since they are for handling
I/O errors and starting up.
+1 once that's fixed.
thanks, [~yzhangal].
> Block scanner INFO message is spamming logs
> -------------------------------------------
>
> Key: HDFS-8659
> URL: https://issues.apache.org/jira/browse/HDFS-8659
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Affects Versions: 2.7.1
> Reporter: Yongjun Zhang
> Assignee: Yongjun Zhang
> Labels: supportability
> Attachments: HDFS-8659.001.patch
>
>
> We are seeing the following message spam the DN log:
> {quote}
> 2015-06-16 08:51:10,566 INFO
> org.apache.hadoop.hdfs.server.datanode.BlockScanner: Not scanning suspicious
> block BP-943360218-10.106.148.16-1416571803827:blk_1083076388_9372245 on
> DS-2ec89056-afb0-459e-b4e0-ac5eaececda3, because the block scanner is
> disabled.
> {quote}
> Create this jira to change this and other relevant messages to debug level.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
