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https://issues.apache.org/jira/browse/HDDS-1116?focusedWorklogId=199265&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-199265
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ASF GitHub Bot logged work on HDDS-1116:
----------------------------------------
Author: ASF GitHub Bot
Created on: 15/Feb/19 14:42
Start Date: 15/Feb/19 14:42
Worklog Time Spent: 10m
Work Description: elek commented on pull request #491: HDDS-1116. Add
java profiler servlet to the Ozone web servers
URL: https://github.com/apache/hadoop/pull/491
Thanks to [~gopalv] we learned that [~prasanth_j] implemented a helper
servlet in Hive to initialize new [async
profiler|https://github.com/jvm-profiling-tools/async-profiler] sessions and
provide the svg based flame graph over HTTP. (see HIVE-20202)
It seems to very useful as with this approach the profiling could be very
easy.
This patch imports the servlet from the Hive code base to the Ozone code
base with minor modification (to make it work with our servlet containers)
* The two servlets are unified to one
* Streaming the svg to the browser based on IOUtils.copy
* Output message is improved
By default the profile servlet is turned off, but you can enable it with
'hdds.profiler.endpoint.enabled=true' ozone-site.xml settings. In that case you
can access the /prof endpoint from scm,om,s3g.
You should upload the async profiler first
(https://github.com/jvm-profiling-tools/async-profiler) and set the
ASYNC_PROFILER_HOME environment variable to find it.
See: https://issues.apache.org/jira/browse/HDDS-1116
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Issue Time Tracking
-------------------
Worklog Id: (was: 199265)
Time Spent: 10m
Remaining Estimate: 0h
> Add java profiler servlet to the Ozone web servers
> --------------------------------------------------
>
> Key: HDDS-1116
> URL: https://issues.apache.org/jira/browse/HDDS-1116
> Project: Hadoop Distributed Data Store
> Issue Type: Improvement
> Reporter: Elek, Marton
> Assignee: Elek, Marton
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Thanks to [~gopalv] we learned that [~prasanth_j] implemented a helper
> servlet in Hive to initialize new [async
> profiler|https://github.com/jvm-profiling-tools/async-profiler] sessions and
> provide the svg based flame graph over HTTP. (see HIVE-20202)
> It seems to very useful as with this approach the profiling could be very
> easy.
> This patch imports the servlet from the Hive code base to the Ozone code base
> with minor modification (to make it work with our servlet containers)
> * The two servlets are unified to one
> * Streaming the svg to the browser based on IOUtils.copy
> * Output message is improved
> By default the profile servlet is turned off, but you can enable it with
> 'hdds.profiler.endpoint.enabled=true' ozone-site.xml settings. In that case
> you can access the /prof endpoint from scm,om,s3g.
> You should upload the async profiler first
> (https://github.com/jvm-profiling-tools/async-profiler) and set the
> ASYNC_PROFILER_HOME environment variable to find it.
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