[jira] [Resolved] (DERBY-6456) Infinite loop in NetworkServerControlImpl when reply >= 32k

["Knut Anders Hatlen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DERBY-6456?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Knut Anders Hatlen resolved DERBY-6456.
---------------------------------------

          Resolution: Fixed
       Fix Version/s: 10.11.0.0
                      10.10.1.4
    Issue & fix info:   (was: Patch Available)

> Infinite loop in NetworkServerControlImpl when reply >= 32k
> -----------------------------------------------------------
>
>                 Key: DERBY-6456
>                 URL: https://issues.apache.org/jira/browse/DERBY-6456
>             Project: Derby
>          Issue Type: Bug
>          Components: Network Server
>    Affects Versions: 10.10.1.1
>            Reporter: Martin JANDA
>            Assignee: Knut Anders Hatlen
>             Fix For: 10.10.1.4, 10.11.0.0
>
>         Attachments: d6456-1a.diff
>
>
> When size of reply in NetworkServerControlImpl  equals to 32k (max size for short) ensureDataInBuffer is in infinite loop. clientIs.read(..., replyBuffer.length - replyBufferCount) return 0 because 'replyBuffer.length - replyBufferCount' is 0 (bytes to read).
> Steps to reproduce:
> Open many connections (for me 34) with at least 1 SELECT query. and call getRuntimeInfo(). Runtime info string.length > 32kB. Leading to infinite loop.



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