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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-4088) DDMReader readBytes ArrayIndexOutOfBoundsException
Date Wed, 18 Mar 2009 16:44:50 GMT

     [ https://issues.apache.org/jira/browse/DERBY-4088?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Knut Anders Hatlen updated DERBY-4088:
--------------------------------------

    Attachment: derby-4088-2.diff

The attached patch reverts the changes to DDMReader.compressBLayerData() made in revision
752813 and instead makes ensureBLayerDataInBuffer() use the same approach as Reply.java. All
the regression tests, including the regression test for this issue, still pass.

> DDMReader readBytes ArrayIndexOutOfBoundsException
> --------------------------------------------------
>
>                 Key: DERBY-4088
>                 URL: https://issues.apache.org/jira/browse/DERBY-4088
>             Project: Derby
>          Issue Type: Bug
>          Components: Network Server
>    Affects Versions: 10.4.2.0
>         Environment: CentOS 5, java 1.6.0_11
>            Reporter: Urban Widmark
>            Assignee: Knut Anders Hatlen
>             Fix For: 10.5.0.0
>
>         Attachments: derby-4088-2.diff, derby-4088.diff, derby-ddm.patch, DerbyBug.java
>
>
> DDMReader.readBytes(int length) checks the length vs DssConstants.MAX_DSS_LENGTH, but
ignores the fact that the buffer position "pos" might not be 0. If pos is non-zero then the
pos + length can be larger than the size of "buffer" causing an ArrayIndexOutOfBoundsException.
> For me this happened when sending a BLOB that was 32766 bytes long. The value of pos
was 2 in that method.

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