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https://issues.apache.org/jira/browse/HBASE-12665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14240329#comment-14240329
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stack commented on HBASE-12665:
-------------------------------
It dumps all beans into stdout. Hundreds of lines yes... the JMX output. The
emission was for standalone/unit test yes. Just demo'ing it 'works'.
bq. What I liked about what we had before was that it was concise and contained
mostly stuff I was interested in
What you interested in? Metrics are spread around a number of beans. Yes, a
bunch of operations have histograms now. The output looks kinda useful when
server crash is 'fatal' (minus perhaps runtime bean dumping classpath again).
Stdout is intentional, yes. Could make a 'String' and then give that to
logging system but seems a bit obnoxious when in a fatal state.
bq. Finally, it would be nice to get some description of what's being dumped. I
was actually confused when I saw this part:
Let me fix.
Let me see if I can do an edit on the output.. do a few beans only.
> When aborting, dump metrics
> ---------------------------
>
> Key: HBASE-12665
> URL: https://issues.apache.org/jira/browse/HBASE-12665
> Project: HBase
> Issue Type: Bug
> Components: Operability
> Reporter: stack
> Assignee: stack
> Fix For: 1.0.0, 2.0.0, 0.98.9
>
> Attachments: 0001-First-cut.patch,
> 0001-HBASE-12665-When-aborting-dump-metrics.patch, 12665v3.txt
>
>
> We used to dump out all metrics when we were exiting on abort. Was of use
> debugging why the abort. We used to have this. [~jdcryans] noticed it was
> dropped by his brother [~eclark] over in HBASE-6410 "Move RegionServer
> Metrics to metrics2" To stop the two brothers fighting I intervened with this
> patch.
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