Lock contention while running web service tests to analyze the performance of JCAPS. The web service is a very simple EJB that echoes the request back as the response. The JStack output is given below.

"httpSSLWorkerThread-8080-58" daemon prio=3 tid=0x0a406000 nid=0x1e0 waiting for monitor entry [0x2c654000..0x2c6559f0]
  java.lang.Thread.State: BLOCKED (on object monitor)
       at com.sun.org.apache.xalan.internal.xsltc.trax.SAX2DOM.<init>(SAX2DOM.java:68)
       - waiting to lock <0x3730c410> (a java.lang.Class for com.sun.org.apache.xalan.internal.xsltc.trax.SAX2DOM)
       at com.sun.org.apache.xalan.internal.xsltc.runtime.output.TransletOutputHandlerFactory.getSerializationHandler(TransletOutputHandlerFactory.java:187)
       at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.getOutputHandler(TransformerImpl.java:392)
       at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerHandlerImpl.setResult(TransformerHandlerImpl.java:137)
       at com.sun.xml.bind.v2.runtime.unmarshaller.DomLoader$State.<init>(DomLoader.java:74)
       at com.sun.xml.bind.v2.runtime.unmarshaller.DomLoader.startElement(DomLoader.java:113)
       at com.sun.xml.bind.v2.runtime.unmarshaller.XsiTypeLoader.startElement(XsiTypeLoader.java:73)
       at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext._startElement(UnmarshallingContext.java:449)
       at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.startElement(UnmarshallingContext.java:427)
       at com.sun.xml.bind.v2.runtime.unmarshaller.InterningXmlVisitor.startElement(InterningXmlVisitor.java:71)
       at com.sun.xml.bind.v2.runtime.unmarshaller.StAXStreamConnector.handleStartElement(StAXStreamConnector.java:275)
       at com.sun.xml.bind.v2.runtime.unmarshaller.StAXStreamConnector.bridge(StAXStreamConnector.java:209)
       at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:358)
       at com.sun.xml.bind.v2.runtime.BridgeImpl.unmarshal(BridgeImpl.java:120)
       at com.sun.xml.bind.api.Bridge.unmarshal(Bridge.java:233)
       at com.sun.xml.ws.message.stream.StreamMessage.readPayloadAsJAXB(StreamMessage.java:229)