在 coldfusion 中循环时避免堆错误
Avoid heap error while looping in coldfusion
我正在尝试遍历维度为 12000 * 20 的 2-D 数组，并且我不断得到 java.lang.OutOfMemoryError。
最初我认为这可能是因为堆大小，所以我增加了堆大小，但我仍然遇到同样的错误。所以我 运行 一个像这样的垃圾收集器：
<cflock name="checkMemory" type="exclusive" timeout="1" throwontimeout="yes">
<cfset objSystem = CreateObject( "java", "java.lang.System" )>
<cfset objSystem.gc()>
</cflock>
我转储了 850MB:
左右的可用内存
<cfset runtime = CreateObject("java","java.lang.Runtime").getRuntime()>
<cfset freeMemory = runtime.freeMemory()>
<cfdump var="#freeMemory#" label="free">
我在这里尝试创建一个 XML 变量，但在循环时出现堆错误：
<cfxml variable="variables.XML">
<cfoutput>
<ROWS>
<cfloop from="3" to="#arrayLen(local.array)#" index="i" step="1">
<ROW>
<cfloop from="1" to="#arrayLen(local.array[2])#" index="j" step="1">
<#ucase(local.array[2][j])#>
<![CDATA[#trim(local.array[i][j])#]]>
</#ucase(local.array[2][j])#>
</cfloop>
</ROW>
</cfloop>
</ROWS>
</cfoutput>
</cfxml>
这是堆栈跟踪：
java.lang.OutOfMemoryError at
java.io.WinNTFileSystem.getBooleanAttributes(Native Method) at
java.io.File.exists(File.java:733) at
coldfusion.xml.XmlProcessor.getSourceURL(XmlProcessor.java:246) at
coldfusion.xml.XmlProcessor.parse(XmlProcessor.java:155) at
coldfusion.tagext.lang.XmlTag.doEndTag(XmlTag.java:85) at
cffeeds2ecfc1003675922$funcDEMO1._factor8(C:\component\abc.cfc:1235)
at
cffeeds2ecfc1003675922$funcDEMO1.runFunction(C:\component\abc.cfc:1192)
at coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:472) at
coldfusion.runtime.UDFMethod$ReturnTypeFilter.invoke(UDFMethod.java:405)
at
coldfusion.runtime.UDFMethod$ArgumentCollectionFilter.invoke(UDFMethod.java:368)
at
coldfusion.filter.FunctionAccessFilter.invoke(FunctionAccessFilter.java:55)
at coldfusion.runtime.UDFMethod.runFilterChain(UDFMethod.java:321) at
coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:220) at
coldfusion.runtime.CfJspPage._invokeUDF(CfJspPage.java:2582) at
cffeeds2ecfc1003675922$funcDEMO.runFunction(\component\abc.cfc:935) at
coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:472) at
coldfusion.runtime.UDFMethod$ReturnTypeFilter.invoke(UDFMethod.java:405)
at
coldfusion.runtime.UDFMethod$ArgumentCollectionFilter.invoke(UDFMethod.java:368)
at
coldfusion.filter.FunctionAccessFilter.invoke(FunctionAccessFilter.java:55)
at coldfusion.runtime.UDFMethod.runFilterChain(UDFMethod.java:321) at
coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:517) at
coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:496) at
coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:355) at
coldfusion.filter.ComponentFilter.invoke(ComponentFilter.java:188) at
coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:374)
at
coldfusion.filter.RequestMonitorFilter.invoke(RequestMonitorFilter.java:48)
at coldfusion.filter.MonitoringFilter.invoke(MonitoringFilter.java:40)
at coldfusion.filter.PathFilter.invoke(PathFilter.java:94) at
coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:70) at
coldfusion.filter.ClientScopePersistenceFilter.invoke(ClientScopePersistenceFilter.java:28)
at coldfusion.filter.BrowserFilter.invoke(BrowserFilter.java:38) at
coldfusion.filter.NoCacheFilter.invoke(NoCacheFilter.java:46) at
coldfusion.filter.GlobalsFilter.invoke(GlobalsFilter.java:38) at
coldfusion.filter.DatasourceFilter.invoke(DatasourceFilter.java:22) at
coldfusion.xml.rpc.CFCServlet.invoke(CFCServlet.java:139) at
coldfusion.xml.rpc.CFCServlet.doPost(CFCServlet.java:290) at
javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at
org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at
coldfusion.bootstrap.BootstrapServlet.service(BootstrapServlet.java:89)
at jrun.servlet.FilterChain.doFilter(FilterChain.java:86) at
com.intergral.fusionreactor.filter.FusionReactorFilter.i(FusionReactorFilter.java:566)
at
com.intergral.fusionreactor.filter.FusionReactorFilter.c(FusionReactorFilter.java:258)
at
com.intergral.fusionreactor.filter.FusionReactorFilter.doFilter(FusionReactorFilter.java:164)
at jrun.servlet.FilterChain.doFilter(FilterChain.java:94) at
coldfusion.monitor.event.MonitoringServletFilter.doFilter(MonitoringServletFilter.java:42)
at
coldfusion.bootstrap.BootstrapFilter.doFilter(BootstrapFilter.java:46)
at jrun.servlet.FilterChain.doFilter(FilterChain.java:94) at
jrun.servlet.FilterChain.service(FilterChain.java:101) at
jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:106) at
jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42) at
jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:286)
at
jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:543)
at
jrun.servlet.jrpp.JRunProxyService.invokeRunnable(JRunProxyService.java:203)
at
jrunx.scheduler.ThreadPool$DownstreamMetrics.invokeRunnable(ThreadPool.java:320)
at
jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:428)
at
jrunx.scheduler.ThreadPool$UpstreamMetrics.invokeRunnable(ThreadPool.java:266)
at jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)
是否有更好的解决方案来避免这样的循环或解决此错误？
我在本地创建了一个 cfm 页面，并在其中添加了一些变量，如下所示：
<cfset runtime = CreateObject("java","java.lang.Runtime").getRuntime()>
<cfset freeMemory = runtime.freeMemory()>
<cfset totalMemory = runtime.totalMemory()>
<cfset maxMemory = runtime.maxMemory()>
<cfdump var="#freeMemory#" label="free">
<cfdump var="#totalMemory#" label="total">
<cfdump var="#maxMemory#" label="max">
每次我刷新此页面时，可用内存大小都会减少，直到我 运行 GC。我仍在努力弄清楚为什么会这样。在这方面有什么建议吗？
请帮忙。
提前致谢。
根据 Adam Cameron, Dan Bracuk and James Moberg 的建议，我完成了以下操作，现在我没有收到堆错误。我怀疑这是因为 CFXML 标签但不确定。
正在将 array[2] 的所有元素转换为大写：
<cfloop from="1" to="#arrayLen(local.array[2])#" index="i" step="1">
<cfset local.array[2][i] = ucase(local.array[2][i])>
</cfloop>
然后使用cfsavecontent生成xml字符串：
<cfsavecontent variable="local.xmlString">
<?xml version="1.0" encoding="UTF-8"?>
<ROWS>
<cfoutput>
<cfloop from="3" to="#arrayLen(local.array)#" index="local.currentRow" step="1">
<ROW>
<cfloop from="1" to="#arrayLen(local.array[2])#" index="local.currentColumn" step="1">
<#local.array[2][local.currentColumn]#>
<![CDATA[#trim(local.array[local.currentRow][local.currentColumn])#]]>
</#local.array[2][local.currentColumn]#>
</cfloop>
</ROW>
</cfloop>
</cfoutput>
</ROWS>
</cfsavecontent>
<cfset local.xml = xmlParse(local.xmlString)>
我正在尝试遍历维度为 12000 * 20 的 2-D 数组，并且我不断得到 java.lang.OutOfMemoryError。
最初我认为这可能是因为堆大小，所以我增加了堆大小，但我仍然遇到同样的错误。所以我 运行 一个像这样的垃圾收集器：
<cflock name="checkMemory" type="exclusive" timeout="1" throwontimeout="yes">
<cfset objSystem = CreateObject( "java", "java.lang.System" )>
<cfset objSystem.gc()>
</cflock>
我转储了 850MB:
<cfset runtime = CreateObject("java","java.lang.Runtime").getRuntime()>
<cfset freeMemory = runtime.freeMemory()>
<cfdump var="#freeMemory#" label="free">
我在这里尝试创建一个 XML 变量，但在循环时出现堆错误：
<cfxml variable="variables.XML">
<cfoutput>
<ROWS>
<cfloop from="3" to="#arrayLen(local.array)#" index="i" step="1">
<ROW>
<cfloop from="1" to="#arrayLen(local.array[2])#" index="j" step="1">
<#ucase(local.array[2][j])#>
<![CDATA[#trim(local.array[i][j])#]]>
</#ucase(local.array[2][j])#>
</cfloop>
</ROW>
</cfloop>
</ROWS>
</cfoutput>
</cfxml>
这是堆栈跟踪：
java.lang.OutOfMemoryError at java.io.WinNTFileSystem.getBooleanAttributes(Native Method) at java.io.File.exists(File.java:733) at coldfusion.xml.XmlProcessor.getSourceURL(XmlProcessor.java:246) at coldfusion.xml.XmlProcessor.parse(XmlProcessor.java:155) at coldfusion.tagext.lang.XmlTag.doEndTag(XmlTag.java:85) at cffeeds2ecfc1003675922$funcDEMO1._factor8(C:\component\abc.cfc:1235) at cffeeds2ecfc1003675922$funcDEMO1.runFunction(C:\component\abc.cfc:1192) at coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:472) at coldfusion.runtime.UDFMethod$ReturnTypeFilter.invoke(UDFMethod.java:405) at coldfusion.runtime.UDFMethod$ArgumentCollectionFilter.invoke(UDFMethod.java:368) at coldfusion.filter.FunctionAccessFilter.invoke(FunctionAccessFilter.java:55) at coldfusion.runtime.UDFMethod.runFilterChain(UDFMethod.java:321) at coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:220) at coldfusion.runtime.CfJspPage._invokeUDF(CfJspPage.java:2582) at cffeeds2ecfc1003675922$funcDEMO.runFunction(\component\abc.cfc:935) at coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:472) at coldfusion.runtime.UDFMethod$ReturnTypeFilter.invoke(UDFMethod.java:405) at coldfusion.runtime.UDFMethod$ArgumentCollectionFilter.invoke(UDFMethod.java:368) at coldfusion.filter.FunctionAccessFilter.invoke(FunctionAccessFilter.java:55) at coldfusion.runtime.UDFMethod.runFilterChain(UDFMethod.java:321) at coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:517) at coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:496) at coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:355) at coldfusion.filter.ComponentFilter.invoke(ComponentFilter.java:188) at coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:374) at coldfusion.filter.RequestMonitorFilter.invoke(RequestMonitorFilter.java:48) at coldfusion.filter.MonitoringFilter.invoke(MonitoringFilter.java:40) at coldfusion.filter.PathFilter.invoke(PathFilter.java:94) at coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:70) at coldfusion.filter.ClientScopePersistenceFilter.invoke(ClientScopePersistenceFilter.java:28) at coldfusion.filter.BrowserFilter.invoke(BrowserFilter.java:38) at coldfusion.filter.NoCacheFilter.invoke(NoCacheFilter.java:46) at coldfusion.filter.GlobalsFilter.invoke(GlobalsFilter.java:38) at coldfusion.filter.DatasourceFilter.invoke(DatasourceFilter.java:22) at coldfusion.xml.rpc.CFCServlet.invoke(CFCServlet.java:139) at coldfusion.xml.rpc.CFCServlet.doPost(CFCServlet.java:290) at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at coldfusion.bootstrap.BootstrapServlet.service(BootstrapServlet.java:89) at jrun.servlet.FilterChain.doFilter(FilterChain.java:86) at com.intergral.fusionreactor.filter.FusionReactorFilter.i(FusionReactorFilter.java:566) at com.intergral.fusionreactor.filter.FusionReactorFilter.c(FusionReactorFilter.java:258) at com.intergral.fusionreactor.filter.FusionReactorFilter.doFilter(FusionReactorFilter.java:164) at jrun.servlet.FilterChain.doFilter(FilterChain.java:94) at coldfusion.monitor.event.MonitoringServletFilter.doFilter(MonitoringServletFilter.java:42) at coldfusion.bootstrap.BootstrapFilter.doFilter(BootstrapFilter.java:46) at jrun.servlet.FilterChain.doFilter(FilterChain.java:94) at jrun.servlet.FilterChain.service(FilterChain.java:101) at jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:106) at jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42) at jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:286) at jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:543) at jrun.servlet.jrpp.JRunProxyService.invokeRunnable(JRunProxyService.java:203) at jrunx.scheduler.ThreadPool$DownstreamMetrics.invokeRunnable(ThreadPool.java:320) at jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:428) at jrunx.scheduler.ThreadPool$UpstreamMetrics.invokeRunnable(ThreadPool.java:266) at jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)
是否有更好的解决方案来避免这样的循环或解决此错误？
我在本地创建了一个 cfm 页面，并在其中添加了一些变量，如下所示：
<cfset runtime = CreateObject("java","java.lang.Runtime").getRuntime()>
<cfset freeMemory = runtime.freeMemory()>
<cfset totalMemory = runtime.totalMemory()>
<cfset maxMemory = runtime.maxMemory()>
<cfdump var="#freeMemory#" label="free">
<cfdump var="#totalMemory#" label="total">
<cfdump var="#maxMemory#" label="max">
每次我刷新此页面时，可用内存大小都会减少，直到我 运行 GC。我仍在努力弄清楚为什么会这样。在这方面有什么建议吗？
请帮忙。 提前致谢。
根据 Adam Cameron, Dan Bracuk and James Moberg 的建议，我完成了以下操作，现在我没有收到堆错误。我怀疑这是因为 CFXML 标签但不确定。
正在将 array[2] 的所有元素转换为大写：
<cfloop from="1" to="#arrayLen(local.array[2])#" index="i" step="1">
<cfset local.array[2][i] = ucase(local.array[2][i])>
</cfloop>
然后使用cfsavecontent生成xml字符串：
<cfsavecontent variable="local.xmlString">
<?xml version="1.0" encoding="UTF-8"?>
<ROWS>
<cfoutput>
<cfloop from="3" to="#arrayLen(local.array)#" index="local.currentRow" step="1">
<ROW>
<cfloop from="1" to="#arrayLen(local.array[2])#" index="local.currentColumn" step="1">
<#local.array[2][local.currentColumn]#>
<![CDATA[#trim(local.array[local.currentRow][local.currentColumn])#]]>
</#local.array[2][local.currentColumn]#>
</cfloop>
</ROW>
</cfloop>
</cfoutput>
</ROWS>
</cfsavecontent>
<cfset local.xml = xmlParse(local.xmlString)>