DefinitionsFactoryException: XML error reading definitions under large load
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Key: TILES-505
URL: https://issues.apache.org/jira/browse/TILES-505
Project: Tiles
Issue Type: Bug
Components: tiles-core
Affects Versions: 2.0.0
Environment: Tomcat 5.5.27, Struts 2.0.6.
Reporter: Boxiong Ding
I am using Struts 2.0.6, Tiles 2.0 and Tomcat 5.5.27. The application runs fine
in the past, but recently we did some load testing and get the following
exception intermittently during load test:
2010-04-08 05:51:09,970 ERROR [http-443-Processor22] ? - End event threw
exception
java.lang.NoSuchMethodException: No such accessible method: addAttribute() on
object: org.apache.tiles.definition.digester.DigesterDefinitionsReader
at
org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.java:250)
at org.apache.commons.digester.SetNextRule.end(SetNextRule.java:208)
at org.apache.commons.digester.Rule.end(Rule.java:228)
at org.apache.commons.digester.Digester.endElement(Digester.java:1067)
at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown
Source)
at
org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)
at org.apache.xerces.impl.dtd.XMLDTDValidator.emptyElement(Unknown
Source)
at
org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
Source)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.commons.digester.Digester.parse(Digester.java:1591)
at
org.apache.tiles.definition.digester.DigesterDefinitionsReader.read(DigesterDefinitionsReader.java:158)
at
org.apache.tiles.definition.UrlDefinitionsFactory.readDefinitions(UrlDefinitionsFactory.java:257)
at
org.apache.tiles.definition.UrlDefinitionsFactory.getComponentDefinitions(UrlDefinitionsFactory.java:116)
at
org.apache.tiles.definition.UrlDefinitionsFactory.getDefinition(UrlDefinitionsFactory.java:136)
at
org.apache.tiles.impl.BasicTilesContainer.getDefinition(BasicTilesContainer.java:463)
at
org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:363)
at
org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:345)
at
org.apache.struts2.views.tiles.TilesResult.doExecute(TilesResult.java:107)
at
org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:178)
at
com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:343)
and immediately with the following exceptions:
2010-04-08 05:51:09,970 ERROR [http-443-Processor38] ? -
ApplicationSessionAwareInterceptor:
org.apache.tiles.definition.DefinitionsFactoryException: XML error reading
definitions.
at
org.apache.tiles.definition.digester.DigesterDefinitionsReader.read(DigesterDefinitionsReader.java:161)
at
org.apache.tiles.definition.UrlDefinitionsFactory.readDefinitions(UrlDefinitionsFactory.java:257)
at
org.apache.tiles.definition.UrlDefinitionsFactory.getComponentDefinitions(UrlDefinitionsFactory.java:116)
at
org.apache.tiles.definition.UrlDefinitionsFactory.getDefinition(UrlDefinitionsFactory.java:136)
at
org.apache.tiles.impl.BasicTilesContainer.getDefinition(BasicTilesContainer.java:463)
at
org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:363)
at
org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:345)
at
org.apache.struts2.views.tiles.TilesResult.doExecute(TilesResult.java:107)
at
org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:178)
at
com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:343)
Both exceptions are from DigesterDefinitionsReader.java and root cause for the
second one is "org.xml.sax.SAXException: FWK005 parse may not be called while
parsing.".
I am wondering if tiles is thread safe in reading xml definitions. What I
understand is it is using Xerces parser to parse tiles.xml, but Xerces parser
is not thread safe [http://xerces.apache.org/xerces2-j/faq-dom.html], so there
should be some synchronization.
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