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https://issues.apache.org/jira/browse/HBASE-24994?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17192848#comment-17192848
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Hudson commented on HBASE-24994:
--------------------------------
Results for branch master
[build #39 on
builds.a.o|https://ci-hadoop.apache.org/job/HBase/job/HBase%20Nightly/job/master/39/]:
(x) *{color:red}-1 overall{color}*
----
details (if available):
(/) {color:green}+1 general checks{color}
-- For more information [see general
report|https://ci-hadoop.apache.org/job/HBase/job/HBase%20Nightly/job/master/39/General_20Nightly_20Build_20Report/]
(/) {color:green}+1 jdk11 hadoop3 checks{color}
-- For more information [see jdk11
report|https://ci-hadoop.apache.org/job/HBase/job/HBase%20Nightly/job/master/39/JDK11_20Nightly_20Build_20Report_20_28Hadoop3_29/]
(/) {color:green}+1 source release artifact{color}
-- See build output for details.
(x) {color:red}-1 client integration test{color}
--Failed when running client tests on top of Hadoop 2. [see log for
details|https://ci-hadoop.apache.org/job/HBase/job/HBase%20Nightly/job/master/39//artifact/output-integration/hadoop-2.log].
(note that this means we didn't run on Hadoop 3)
> Add hedgedReadOpsInCurThread metric
> -----------------------------------
>
> Key: HBASE-24994
> URL: https://issues.apache.org/jira/browse/HBASE-24994
> Project: HBase
> Issue Type: Improvement
> Components: metrics
> Reporter: Javier Akira Luca de Tena
> Assignee: Javier Akira Luca de Tena
> Priority: Minor
> Fix For: 3.0.0-alpha-1
>
>
> When adding Hedged Reads metrics at
> https://issues.apache.org/jira/browse/HBASE-12220, hedgedReadOpsInCurThread
> was not included.
> I wonder if there was any reason to not include them. If not, I will provide
> pull request to include them soon.
>
> Hedged reads use same thread pool for the original read:
>
> [https://github.com/apache/hadoop/blob/0b8464d75227fcee2c6e7f2410377b3d53d3d5f8/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java#L1349-L1357]
> When the executor is full and rejects the task, it will be executed in
> current thread, increasing this metric:
>
> [https://github.com/apache/hadoop/blob/0b8464d75227fcee2c6e7f2410377b3d53d3d5f8/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSClient.java#L2913-L2918]
> This metric is very useful to determine if the hedged reads thread pool
> (dfs.client.hedged.read.threadpool.size) is undersized.
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