Your recursive template is tail-recursive (the last thing it does is to
call itself) so a processor that does tail-call optimization should not
blow the stack. Try Saxon or jd.xslt.

Michael Kay

> -----Original Message-----
> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx 
> [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Dipesh Khakhkhar
> Sent: 18 September 2003 16:28
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject:  Callstack overflow error !! It is not inifinte 
> recusive loop ??
> Importance: High
> 
> 
> Hi,
> 
> I am getting Callstack overflow error when a template is 
> called recursively.
> 
> I am finding unique attribute names for some node which is 
> repeating itself 
> many times say 100 or more than that. This node is having 11 
> attributes. So 
> first i am getting attribute names like this
> 
> xsl:variable name="ResColNames" 
> select="/Root/FirstNode/SecondNode/@*"/>
> 
> So there are 100 or more SecondNode in the xml input document 
> and each node is 
> having 10 or more attributes.
> 
> Then I am calling a recusive template to get the unique 
> attribute names.
> 
> <xsl:variable name="uniqueColumnNamesRes">
> 		<xsl:call-template 
> name="findUniqueNamesForNodesWithAtt">
> 			<xsl:with-param name="names" 
> select="$ResColNames"/>
> 			<xsl:with-param name="uniqueNames"/>
> 			<xsl:with-param name="i">0</xsl:with-param>
> 		</xsl:call-template>
> </xsl:variable>
> 
> The following is the template which is called.
> 
> <!-- This is to find unique Column Names  for nodes with 
> attributes as 
> columns-->	
> <xsl:template name="findUniqueNamesForNodesWithAtt">
>   <xsl:param name="names"/>
>   <xsl:param name="uniqueNames"/>
>   <xsl:param name="i"/>
>   <xsl:choose>
>      <xsl:when test="$i &lt;= count($names)">
>        <xsl:variable name="newUniqueName">
> 	<xsl:choose>
> 	  <xsl:when test="contains($uniqueNames, name($names[$i]))">
> 	     <xsl:value-of select="$uniqueNames"/>
> 	  </xsl:when>
> 	  <xsl:otherwise>
> 	     <xsl:value-of 
> select="concat($uniqueNames,'`',name($names[$i]))"/>
> 	  </xsl:otherwise>
> 	</xsl:choose>
>        </xsl:variable>
>        <xsl:call-template name="findUniqueNamesForNodesWithAtt">
> 	<xsl:with-param name="names" select="$names"/>
> 	<xsl:with-param name="uniqueNames" select="$newUniqueName"/>
> 	<xsl:with-param name="i" select="$i + 1"/>
>        </xsl:call-template>
>     </xsl:when>
>     <xsl:otherwise>
>         <xsl:value-of select="concat($uniqueNames,'`')"/>
>     </xsl:otherwise>
>    </xsl:choose>
> </xsl:template>
> 
> 
> The same template when called with the same input file is 
> running without any 
> error producing expected output. I am not able to figure out 
> why this is 
> executing properly.
> 
> But when the same template is called for the same input file 
> from different 
> xsl file with same parameters it is giving stack overflow error.
> 
> The iterating variable is reaching 248 and then it is giving 
> error. Can 
> someone please tell me what can be possible reasons? Is this 
> a memory problem 
> ? Or am I taking round about way which can be done in some 
> simple way i.e. to 
> find unique attribute names for some node. Or i should just 
> hardcode the 
> maximum possible attribute names i.e. required and implied 
> from the dtd.
> 
> The recursion is not going infinite I am comparing the 
> variable with the count 
> of one node-set variable having 829 nodes.
> 
> Eagerly waiting for reply.
> 
> Regards,
> Dipesh
> 
> 
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