&quot;scott.stark(a)jboss.org&quot; wrote : | What is calling URL.openStream in this trace? | Usually it's some dynamic EL stuff: | http-127.0.0.1-8080-1 [RUNNABLE] | java.util.zip.ZipFile.getNextEntry(native method) | java.util.zip.ZipFile.access$700(ZipFile.java:35) | java.util.zip.ZipFile$3.nextElement(ZipFile.java:421) | java.util.zip.ZipFile$3.nextElement(ZipFile.java:415) | java.util.jar.JarFile$1.nextElement(JarFile.java:221) | java.util.jar.JarFile$1.nextElement(JarFile.java:220) | org.jboss.virtual.plugins.context.jar.AbstractStructuredJarHandler$JarEntryEnumeration.nextElement(AbstractStructuredJarHandler.java:347) | org.jboss.virtual.plugins.context.jar.AbstractStructuredJarHandler$JarEntryEnumeration.nextElement(AbstractStructuredJarHandler.java:329) | org.jboss.virtual.plugins.context.jar.AbstractStructuredJarHandler.initJarFile(AbstractStructuredJarHandler.java:133) | org.jboss.virtual.plugins.context.jar.AbstractStructuredJarHandler.initJarFile(AbstractStructuredJarHandler.java:107) | org.jboss.virtual.plugins.context.jar.JarHandler.<init>(JarHandler.java:79) | org.jboss.virtual.plugins.context.file.FileSystemContext.createVirtualFileHandler(FileSystemContext.java:182) | org.jboss.virtual.plugins.context.file.FileHandler.getChildren(FileHandler.java:177) | org.jboss.virtual.plugins.context.file.FileSystemContext.createVirtualFileHandler(FileSystemContext.java:242) | org.jboss.virtual.plugins.context.file.FileSystemContext.createVirtualFileHandler(FileSystemContext.java:189) | org.jboss.virtual.plugins.context.file.FileHandler.createChildHandler(FileHandler.java:214) | org.jboss.virtual.plugins.context.AbstractVirtualFileHandler.structuredFindChild(AbstractVirtualFileHandler.java:359) | org.jboss.virtual.plugins.context.file.FileHandler.findChild(FileHandler.java:197) | org.jboss.virtual.plugins.context.AbstractVFSContext.findChild(AbstractVFSContext.java:125) | org.jboss.virtual.VFS.findChild(VFS.java:208) | org.jboss.virtual.plugins.vfs.VirtualFileURLConnection.resolveVirtualFile(VirtualFileURLConnection.java:96) | org.jboss.virtual.plugins.vfs.VirtualFileURLConnection.getVirtualFile(VirtualFileURLConnection.java:109) | org.jboss.virtual.plugins.vfs.VirtualFileURLConnection.getInputStream(VirtualFileURLConnection.java:117) | java.net.URL.openStream(URL.java:1007) | sun.misc.URLClassPath$Loader.findResource(URLClassPath.java:472) | sun.misc.URLClassPath.findResource(URLClassPath.java:142) | java.net.URLClassLoader$2.run(URLClassLoader.java:362) | java.security.AccessController.doPrivileged(native method) | java.net.URLClassLoader.findResource(URLClassLoader.java:359) | java.lang.ClassLoader.getResource(ClassLoader.java:977) | org.jboss.mx.loading.RepositoryClassLoader.getResourceLocally(RepositoryClassLoader.java:265) | org.jboss.mx.loading.LoadMgr3.beginLoadTask(LoadMgr3.java:265) | org.jboss.mx.loading.UnifiedClassLoader.loadClassImpl(UnifiedClassLoader.java:290) | org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassLoader.java:441) | java.lang.ClassLoader.loadClass(ClassLoader.java:251) | java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) | org.jboss.el.parser.ELParser.<init>(ELParser.java:1898) | org.jboss.el.lang.ExpressionBuilder.createNodeInternal(ExpressionBuilder.java:98) | org.jboss.el.lang.ExpressionBuilder.build(ExpressionBuilder.java:151) | org.jboss.el.lang.ExpressionBuilder.createValueExpression(ExpressionBuilder.java:195) | org.jboss.el.ExpressionFactoryImpl.createValueExpression(ExpressionFactoryImpl.java:68) | org.jboss.seam.el.SeamExpressionFactory.createValueExpression(SeamExpressionFactory.java:98) | com.sun.facelets.tag.TagAttribute.getValueExpression(TagAttribute.java:256) | com.sun.facelets.tag.jsf.ValueHolderRule$DynamicValueExpressionMetadata.applyMetadata(ValueHolderRule.java:101) | &quot;scott.stark(a)jboss.org&quot; wrote : | A VirtualFileURLConnection.getInputStream cache might be one cache to introduce. The AbstractURLHandler.openStream would be the other place. The main problem will be making sure these streams are closed to avoid leaks/locks. | How do you cache a stream? Wouldn't it be easier to somehow cache the 'url --> virtual file' mapping? Some timer fifo cache? An abstraction plugable into our JBoss Cache? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4116143#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...