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https://issues.apache.org/jira/browse/HDFS-8026?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14392864#comment-14392864
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Hudson commented on HDFS-8026:
------------------------------
FAILURE: Integrated in Hadoop-Mapreduce-trunk-Java8 #151 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Java8/151/])
HDFS-8026. Trace FSOutputSummer#writeChecksumChunks rather than
DFSOutputStream#writeChunk (cmccabe) (cmccabe: rev
c94d594a57806dec515e2a2053a1221f8ce48cc4)
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSOutputStream.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/tracing/TestTracing.java
*
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FSOutputSummer.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
> Trace FSOutputSummer#writeChecksumChunks rather than
> DFSOutputStream#writeChunk
> -------------------------------------------------------------------------------
>
> Key: HDFS-8026
> URL: https://issues.apache.org/jira/browse/HDFS-8026
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.7.0
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Priority: Minor
> Fix For: 2.8.0
>
> Attachments: HDFS-8026.001.patch
>
>
> We should trace FSOutputSummer#writeChecksumChunks rather than
> DFSOutputStream#writeChunk. When tracing writeChunk, we get a new trace span
> every 512 bytes; when tracing writeChecksumChunks, we normally get a new
> trace span only when the FSOutputSummer buffer is full (9x less often.)
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