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From "Henry Robinson (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (IMPALA-5454) JVM metrics don't show up on /memz sometimes
Date Thu, 08 Jun 2017 22:48:18 GMT

     [ https://issues.apache.org/jira/browse/IMPALA-5454?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Henry Robinson resolved IMPALA-5454.
------------------------------------
       Resolution: Fixed
    Fix Version/s: Impala 2.10.0

https://github.com/apache/incubator-impala/commit/88f1f86b3d2f9ed23a94e285bad6bf09f8c80c93

> JVM metrics don't show up on /memz sometimes
> --------------------------------------------
>
>                 Key: IMPALA-5454
>                 URL: https://issues.apache.org/jira/browse/IMPALA-5454
>             Project: IMPALA
>          Issue Type: Bug
>    Affects Versions: Impala 2.9.0
>            Reporter: Henry Robinson
>            Assignee: Henry Robinson
>             Fix For: Impala 2.10.0
>
>
> Due to a bug in {{mustache.cc}}, {{memz.tmpl}} template rendering fails if the {{buffer_pool}}
JSON entry is not generated.
> The bug is that nested template commands with the same key aren't correctly parsed:
> {code}
> {{?b}} {{#b}}  {{/b}} {{/b}}
> {code}
> If '{{b}}' is not present, the parser tries to skip to the closing {code}{{/b}}{code},
but does not take into account nesting and matches the first closing {code}{{/b}}{code}, not
the second. Parsing then fails. 
> This JIRA is to track the workaround - rewriting the templates not to use nesting. The
[upstream project|https://github.com/HenryR/cpp-mustache] can fix the underlying issue independently.



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