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https://issues.apache.org/jira/browse/HBASE-27888?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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chaijunjie updated HBASE-27888:
-------------------------------
Release Note:
Add a configuration parameter,which control to record read block slow in logs.
<property>
<name>hbase.fs.reader.warn.time.ms</name>
<value>-1</value>
</property>
If reading block cost time in milliseconds more than the threshold, a warning
will be logged,the default value is -1, it means skipping record the read block
slow warning log.
> Record readBlock message in log when it takes too long time
> -----------------------------------------------------------
>
> Key: HBASE-27888
> URL: https://issues.apache.org/jira/browse/HBASE-27888
> Project: HBase
> Issue Type: Improvement
> Components: HFile
> Affects Versions: 2.5.3
> Reporter: chaijunjie
> Assignee: chaijunjie
> Priority: Minor
> Fix For: 2.6.0, 2.5.6, 3.0.0-beta-1
>
>
> After HBASE-15160， we can record the readBlock message by TRACE log in
> org.apache.hadoop.hbase.io.hfile.HFileBlock.FSReaderImpl#readBlockDataInternal，
> But it record all read block message in TRACE log， some times， we only focus
> the block read cost too much time..
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