[jira] Resolved: (DERBY-3589) AllocPage.createPage() doesn't initialize minimumRecordSize correctly

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

     [ https://issues.apache.org/jira/browse/DERBY-3589?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Knut Anders Hatlen resolved DERBY-3589.
---------------------------------------

    Resolution: Fixed

Committed to 10.4 with revision 644961.

> AllocPage.createPage() doesn't initialize minimumRecordSize correctly
> ---------------------------------------------------------------------
>
>                 Key: DERBY-3589
>                 URL: https://issues.apache.org/jira/browse/DERBY-3589
>             Project: Derby
>          Issue Type: Bug
>          Components: Store
>    Affects Versions: 10.3.1.4, 10.4.1.0
>            Reporter: Knut Anders Hatlen
>            Assignee: Knut Anders Hatlen
>            Priority: Minor
>             Fix For: 10.4.1.0, 10.5.0.0
>
>         Attachments: d3589-1a.diff, d3589-1a.stat
>
>
> AllocPage.createPage() will initialize minimumRecordSize to the same
> value as borrowedSpace. See this code taken from AllocPage.java:
> -------------------
> 	protected void createPage(PageKey newIdentity, int[] args) 
> 		 throws StandardException
> 	{
> 		super.createPage(newIdentity, args);
> 		// args[0] is the format id
> 		// args[1] is whether to sync the page to disk or not
> 		// args[2] is the pagesize (used by StoredPage)
> 		// args[3] is the spareSize (used by StoredPage)
> 		// args[4] is the number of bytes to reserve for container header
> 		// args[5] is the minimumRecordSize
> 		// NOTE: the arg list here must match the one in FileContainer
> 		int pageSize = args[2];
> 		int minimumRecordSize = args[5];
> 		borrowedSpace = args[4];
> -------------------
> Here it correctly takes args[5] and puts into the local variable
> minimumRecordSize. However, that variable hides a field with the same
> name, and that field is set to args[4] in the call to
> super.createPage() at the first line in the method. The local variable
> is never used.

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