[#|2011-12-06T15:43:33.747+0800|WARNING|glassfish3.1.2|javax.enterprise.system.container.web.com.sun.enterprise.web|_ThreadID=1883;_ThreadName=Thread-2;|StandardWrapperValve[DownloadServlet]: PWC1406: Servlet.service() for servlet DownloadServlet threw exception
java.lang.RuntimeException: java.lang.NullPointerException
        at org.glassfish.admingui.common.servlet.LBConfigContentSource.getInputStream(LBConfigContentSource.java:114)
        at org.glassfish.admingui.common.servlet.DownloadServlet.writeContent(DownloadServlet.java:277)
        at org.glassfish.admingui.common.servlet.DownloadServlet.doPost(DownloadServlet.java:174)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:688)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)
        at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1542)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
        at org.apache.catalina.core.StandardPipeline.doChainInvoke(StandardPipeline.java:600)
        at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:96)
        at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162)
        at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
        at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:232)
        at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:833)
        at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:730)
        at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1031)
        at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:228)
        at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
        at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
        at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
        at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
        at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
        at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
        at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
        at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
        at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
        at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.NullPointerException
        at org.glassfish.admingui.common.util.RestUtil.restRequest(RestUtil.java:199)
        at org.glassfish.admingui.common.util.RestUtil.restRequest(RestUtil.java:149)
        at org.glassfish.admingui.common.servlet.LBConfigContentSource.getInputStream(LBConfigContentSource.java:110)
        ... 29 more