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From "ChiaPing Tsai (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-12393) The regionserver web will throw exception if we disable block cache
Date Sat, 01 Nov 2014 11:07:34 GMT

     [ https://issues.apache.org/jira/browse/HBASE-12393?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

ChiaPing Tsai updated HBASE-12393:
----------------------------------
    Labels: patch  (was: )
    Status: Patch Available  (was: Open)

To avoid invoking disabled blockcache's method, we use an additional statement(else if) to
evaluate the value of blockcache.
If blockcache is null, it will display "Block Cache is disabled" on the web page of blockcache
stats.

> The regionserver web will throw exception if we disable block cache
> -------------------------------------------------------------------
>
>                 Key: HBASE-12393
>                 URL: https://issues.apache.org/jira/browse/HBASE-12393
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 0.98.7
>         Environment: ubuntu 12.04 64bits, hadoop-2.2.0, hbase-0.98.7-hadoop2
>            Reporter: ChiaPing Tsai
>            Priority: Minor
>              Labels: patch
>         Attachments: HBASE-12393.patch
>
>
> The CacheConfig.getBlockCache() will return the null point when we set hfile.block.cache.size
to zero.
> It caused the BlockCacheTmplImpl.java:123 to throw null exception.
> {code}
> org.jamon.escaping.Escaping.HTML.write(org.jamon.emit.StandardEmitter.valueOf(StringUtils.humanReadableInt(cacheConfig.getBlockCache().size())),
jamonWriter);
> {code}



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