[
https://issues.apache.org/jira/browse/HADOOP-15524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16511314#comment-16511314
]
ASF GitHub Bot commented on HADOOP-15524:
-----------------------------------------
GitHub user jsmithe opened a pull request:
https://github.com/apache/hadoop/pull/393
HADOOP-15524 Bounding array size in BytesWritable to Integer.MAX_VALUE - 8
Bounding array size to Integer.MAX_VALUE - 8 to prevent OutOfMemoryError
from occurring.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/jsmithe/hadoop trunk
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/hadoop/pull/393.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #393
----
----
> BytesWritable causes OOME when array size reaches Integer.MAX_VALUE
> -------------------------------------------------------------------
>
> Key: HADOOP-15524
> URL: https://issues.apache.org/jira/browse/HADOOP-15524
> Project: Hadoop Common
> Issue Type: Bug
> Components: io
> Reporter: Joseph Smith
> Priority: Major
>
> BytesWritable.setSize uses Integer.MAX_VALUE to initialize the internal
> array. On my environment, this causes an OOME
> {code:java}
> Exception in thread "main" java.lang.OutOfMemoryError: Requested array size
> exceeds VM limit
> {code}
> byte[Integer.MAX_VALUE-2] must be used to prevent this error.
> Tested on OSX and CentOS 7 using Java version 1.8.0_131.
> I noticed that java.util.ArrayList contains the following
> {code:java}
> /**
> * The maximum size of array to allocate.
> * Some VMs reserve some header words in an array.
> * Attempts to allocate larger arrays may result in
> * OutOfMemoryError: Requested array size exceeds VM limit
> */
> private static final int MAX_ARRAY_SIZE = Integer.MAX_VALUE - 8;
> {code}
>
> BytesWritable.setSize should use something similar to prevent an OOME from
> occurring.
>
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
