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From "Appy (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-19424) Metrics servlet doesn't work
Date Tue, 02 Jan 2018 20:05:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-19424?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16308629#comment-16308629
] 

Appy commented on HBASE-19424:
------------------------------

[~brfrn169] Works for you on a cluster? If yes, lgtm.


> Metrics servlet doesn't work
> ----------------------------
>
>                 Key: HBASE-19424
>                 URL: https://issues.apache.org/jira/browse/HBASE-19424
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 1.4.0
>            Reporter: Andrew Purtell
>            Assignee: Toshihiro Suzuki
>            Priority: Minor
>             Fix For: 1.4.1, 1.5.0
>
>         Attachments: HBASE-19424.branch-1.patch
>
>
> In branch-1 at least we put up a servlet on "/metrics" that is Hadoop's MetricsServlet.
However HBase users are expected to pick up metrics via "/jmx". We don't mention "/metrics"
or link to it on the UI. If you attempt to access "/metrics" with head of branch-1 it errors
out due to a NPE
> {noformat}
> 2017-12-04 16:06:37,403 ERROR [1874557409@qtp-1910896157-3] mortbay.log: /metrics
> java.lang.NullPointerException
> 	at org.apache.hadoop.http.HttpServer2.isInstrumentationAccessAllowed(HttpServer2.java:1049)
> 	at org.apache.hadoop.metrics.MetricsServlet.doGet(MetricsServlet.java:109)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
> {noformat}



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