HTTP Status 500 – Internal Server Error

Type Exception Report

Message Servlet execution threw an exception

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

javax.servlet.ServletException: Servlet execution threw an exception
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

Root Cause

java.lang.NoClassDefFoundError: org/mozilla/intl/chardet/nsICharsetDetectionObserver
	nu.validator.htmlparser.io.HtmlInputStreamReader.<init>(HtmlInputStreamReader.java:131)
	nu.validator.htmlparser.io.Driver.tokenize(Driver.java:200)
	nu.validator.htmlparser.sax.HtmlParser.tokenize(HtmlParser.java:480)
	nu.validator.htmlparser.sax.HtmlParser.parse(HtmlParser.java:423)
	com.usablenet.parser.Html5Parser.parse(Html5Parser.java:135)
	com.usablenet.transcoder.transformers.MozTransformer.performRequest(Unknown Source)
	com.usablenet.transcoder.transformers.MozTransformer.endDocument(Unknown Source)
	com.usablenet.transcoder.generators.RequestGenerator.generate(Unknown Source)
	org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.processXMLPipeline(AbstractProcessingPipeline.java:581)
	org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.processXMLPipeline(AbstractCachingProcessingPipeline.java:301)
	org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:483)
	org.apache.cocoon.components.treeprocessor.sitemap.SerializeNode.invoke(SerializeNode.java:144)
	org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
	org.apache.cocoon.components.treeprocessor.ContainerNode.invoke(ContainerNode.java:32)
	org.apache.cocoon.components.treeprocessor.sitemap.CallNode.invoke(CallNode.java:94)
	org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
	org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(MatchNode.java:108)
	org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
	org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
	org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
	org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:93)
	org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:236)
	org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:178)
	org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:254)
	org.apache.cocoon.Cocoon.process(Cocoon.java:699)
	org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java:1162)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

Note The full stack trace of the root cause is available in the server logs.

HTTP Status 500 – Internal Server Error

Apache Tomcat/8.5.78