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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12393) The regionserver web will throw exception if we disable block cache
Date Fri, 31 Oct 2014 15:38:34 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12393?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14191953#comment-14191953
] 

stack commented on HBASE-12393:
-------------------------------

Why set it to zero? When would it make sense? i.e. loading index blocks every time rather
than keeping them around in mem.  But yeah, shouldn't NPE.  If you have a patch that fixes
the NPE and it works for you, attach and we'll commit (but will add WARNINGs that 0 block
cache is bad idea as per [~jmspaggi])

> 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
>
> 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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