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https://issues.apache.org/jira/browse/HADOOP-14680?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16108608#comment-16108608
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Steve Loughran commented on HADOOP-14680:
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its a bit moot now the patch is in, but please be aware that the error message
raised when assertEquals fails only makes sense if the constant/expected value
is the first arg, not the second. That is {{assertEquals(numBytesReadV1,
KILOBYTE)}} should have been {{assertEquals( KILOBYTE, numBytesReadV1)}}. It
doesn't merit a patch here, but its something to remember in future. thanks
> Azure: IndexOutOfBoundsException in BlockBlobInputStream
> --------------------------------------------------------
>
> Key: HADOOP-14680
> URL: https://issues.apache.org/jira/browse/HADOOP-14680
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs/azure
> Reporter: Rajesh Balamohan
> Assignee: Thomas Marquardt
> Priority: Minor
> Fix For: 3.0.0-beta1
>
> Attachments: HADOOP-14680-001.patch, HADOOP-14680-branch-2.01.patch
>
>
> https://github.com/apache/hadoop/blob/trunk/hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/BlockBlobInputStream.java#L361
> On certain conditions, BlockBlobInputStream can throw
> IndexOutOfBoundsException. Following is an example
> {{length:297898, offset:4194304, buf.len:4492202, writePos:4194304}} :
> In this case, {{MemoryOutputStream::capacity()}} would end up returning
> negative value and can cause {{IndexOutOfBoundsException}}
> It should be {{return buffer.length - offset;}} to determine current capacity.
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