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https://issues.apache.org/jira/browse/HADOOP-14475?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16225594#comment-16225594
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Sean Mackrory commented on HADOOP-14475:
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Actually I do have a couple of thoughts on the patch:
* Is there a reason for using >= at the end of testMetricsRegister? It'd be
better to specify exact expectations, IMO.
* I'd like us to examine the 9999 limit more closely. Where does that come
from? I don't see a need for an arbitrary, hard-coded limit here. I'm sure
we're unlikely to get that high anyway, but if we did, I'd start to wonder
about the possibility of overflow and how we handle that properly. If there is
a need for this to fail, I would think it's preferable to fail to initialize
metrics, log that fact, but proceed with everything else.
> Metrics of S3A don't print out when enable it in Hadoop metrics property file
> ------------------------------------------------------------------------------
>
> Key: HADOOP-14475
> URL: https://issues.apache.org/jira/browse/HADOOP-14475
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs/s3
> Affects Versions: 2.8.0
> Environment: uname -a
> Linux client01 4.4.0-74-generic #95-Ubuntu SMP Wed Apr 12 09:50:34 UTC 2017
> x86_64 x86_64 x86_64 GNU/Linux
> cat /etc/issue
> Ubuntu 16.04.2 LTS \n \l
> Reporter: Yonger
> Assignee: Yonger
> Attachments: HADOOP-14475-003.patch, HADOOP-14475.002.patch,
> HADOOP-14475.005.patch, HADOOP-14475.006.patch, HADOOP-14775.007.patch,
> failsafe-report-s3a-it.html, failsafe-report-s3a-scale.html,
> failsafe-report-scale.html, failsafe-report-scale.zip, s3a-metrics.patch1,
> stdout.zip
>
>
> *.sink.file.class=org.apache.hadoop.metrics2.sink.FileSink
> #*.sink.file.class=org.apache.hadoop.metrics2.sink.influxdb.InfluxdbSink
> #*.sink.influxdb.url=http:/xxxxxxxxxx
> #*.sink.influxdb.influxdb_port=8086
> #*.sink.influxdb.database=hadoop
> #*.sink.influxdb.influxdb_username=hadoop
> #*.sink.influxdb.influxdb_password=hadoop
> #*.sink.ingluxdb.cluster=c1
> *.period=10
> #namenode.sink.influxdb.class=org.apache.hadoop.metrics2.sink.influxdb.InfluxdbSink
> #S3AFileSystem.sink.influxdb.class=org.apache.hadoop.metrics2.sink.influxdb.InfluxdbSink
> S3AFileSystem.sink.file.filename=s3afilesystem-metrics.out
> I can't find the out put file even i run a MR job which should be used s3.
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