Excel Sheets with large row count causes out of memory errors

2010-11-24 11:18:12,051 ERROR [TP-Processor6] [renderer.v2.components.MacroRendererComponent] processMacro Unexpected error formatting macro: viewfile
 -- url: /display/spacekey/pageTitle | page: 34709164 | userName: admin | referer: https://confluenceURL/display/spacekey/pageTitle | action: viewpage
java.lang.OutOfMemoryError: Java heap space
	at java.util.Arrays.copyOf(Arrays.java:2882)
	at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:100)
	at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:390)
	at java.lang.StringBuffer.append(StringBuffer.java:224)
	at java.io.StringWriter.write(StringWriter.java:84)
	at com.benryan.conversion.SpreadsheetConverter.writeHeaderStyles(SpreadsheetConverter.java:204)
	at com.benryan.conversion.SpreadsheetConverter.write(SpreadsheetConverter.java:65)
	at com.benryan.conversion.SpreadsheetConverter.convert(SpreadsheetConverter.java:395)
	at com.benryan.conversion.XlsConverter$1.doConversion(XlsConverter.java:42)
	at com.benryan.conversion.DocConverter.execute(DocConverter.java:59)
	at com.benryan.conversion.macro.ConverterMacro.execute(ConverterMacro.java:276)
	at com.atlassian.renderer.v2.macro.ResourceAwareMacroDecorator.execute(ResourceAwareMacroDecorator.java:51)
	at com.atlassian.renderer.v2.components.MacroRendererComponent.executeMacro(MacroRendererComponent.java:203)
	at com.atlassian.renderer.v2.components.MacroRendererComponent.processMacro(MacroRendererComponent.java:169)
	at com.atlassian.renderer.v2.components.MacroRendererComponent.makeMacro(MacroRendererComponent.java:67)
	at com.atlassian.renderer.v2.components.WikiContentRendererHandler.handleMacro(WikiContentRendererHandler.java:18)
	at com.atlassian.renderer.v2.WikiMarkupParser.makeMacro(WikiMarkupParser.java:120)
	at com.atlassian.renderer.v2.WikiMarkupParser.handlePotentialMacro(WikiMarkupParser.java:105)
	at com.atlassian.renderer.v2.WikiMarkupParser.parse(WikiMarkupParser.java:60)
	at com.atlassian.renderer.v2.components.MacroRendererComponent.render(MacroRendererComponent.java:46)
	at com.atlassian.renderer.v2.V2Renderer.render(V2Renderer.java:53)
	at com.atlassian.renderer.v2.plugin.PluggableV2Renderer.render(PluggableV2Renderer.java:30)
	at com.atlassian.renderer.v2.V2RendererFacade.convertWikiToXHtml(V2RendererFacade.java:57)
	at sun.reflect.GeneratedMethodAccessor393.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:304)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
	at com.atlassian.spring.interceptors.SpringProfilingInterceptor.invoke(SpringProfilingInterceptor.java:16)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)