[jira] [Updated] (ACCUMULO-4716) Do not attempt to cache blocks over max array size

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ACCUMULO-4716?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated ACCUMULO-4716:
-------------------------------------
    Labels: newbie pull-request-available  (was: newbie)

> Do not attempt to cache blocks over max array size
> --------------------------------------------------
>
>                 Key: ACCUMULO-4716
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4716
>             Project: Accumulo
>          Issue Type: Bug
>            Reporter: Keith Turner
>            Assignee: Mark Owens
>              Labels: newbie, pull-request-available
>
> One might think you could do {{new byte\[Integer.MAX_VALUE\]}} in Java, but as I found when looking into ACCUMULO-4708 *suprise* you can't.  
> According to the [stack overflow post |https://stackoverflow.com/a/8381338] {{new byte\[Integer.MAX_VALUE - 8\]}} should be safe.  I was able to do up to {{new byte\[Integer.MAX_VALUE - 2\]}} in my local testing.
> When Accumulo caches a block it reads it into a byte array.  For example this code in [CachableBlockFile.java|https://github.com/apache/accumulo/blob/rel/1.8.1/core/src/main/java/org/apache/accumulo/core/file/blockfile/impl/CachableBlockFile.java#L345] does this when {{_currBlock.getRawSize() <= cache.getMaxSize()}}.
> This code should ensure the size is less than {{min( cache.getMaxSize(), MAX_ARRAY_SIZE)}} inorder to read it into a byte array.



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