We have a random error when running JAVA software using ServletExec and JSP. It seems that response is sometime null which cause the error.
The following is ServletExec Log and Java console Log:
ServletExec:
streamtheCommand = null strRequestXML = <REQUEST service="Cadastral" identifier="BJv+q4TFZEdU8H8bjuPPxcmAksY_1255542980848" user="jaind" password="" > <KEEPALIVE/></REQUEST>ServletExec: caught exception - java.lang.IllegalStateException: reset() failed - data has already been sent to client
[Wed Oct 14 14:02:26 EDT 2009] java.lang.IllegalStateException: reset() failed - data has already been sent to client.

Java Console:
java.lang.NullPointerException
at javax.swing.ImageIcon.<init>(Unknown Source)
at com.ema.viewer.MphModel.init(MphModel.java:152)
at com.ema.viewer.EmaViewer.init(EmaViewer.java:212)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
USER NAME: xxx Auth Tag
<?xml version="1.0" encoding="UTF-8"?>
<REQUEST>
<AUTHENTICATE service="xxx" user="xxx" password="xxx" />
</REQUEST>REQUEST DUMP
<?xml version="1.0" encoding="UTF-8"?>
<REQUEST>
<AUTHENTICATE service="Cadastral" user="pavlaks" password="" />
</REQUEST>RESPONSE DUMP EmaServerLink
[RESPONSE: null]MphModel.init()...REQUEST DUMP
<?xml version="1.0" encoding="UTF-8"?>
<REQUEST>
<INIT service="xxx" user="xxx" password="xxx">
<MAP height="-92" width="-180" ovheight="125" ovwidth="150">
<ENVELOPE xmin="1.2775226E7" ymin="464353.4375" xmax="1.2807205E7" ymax="496453.625"/>
</MAP>
</INIT>
</REQUEST>RESPONSE DUMP EmaServerLink
[RESPONSE: null]getting map....null
java.net.MalformedURLException
at java.net.URL.<init>(Unknown Source)
at java.net.URL.<init>(Unknown Source)
at java.net.URL.<init>(Unknown Source)
at com.ema.viewer.gui.LegendPanel.getLegendIcon(LegendPanel.java:63)
at com.ema.viewer.gui.LegendPanel.<init>(LegendPanel.java:39)
at com.ema.viewer.gui.LayerPanel.<init>(LayerPanel.java:86)
at com.ema.viewer.MapView.buildGui(MapView.java:234)
at com.ema.viewer.MapView.init(MapView.java:287)
at com.ema.viewer.MphView.init(MphView.java:86)
at com.ema.viewer.EmaViewer.init(EmaViewer.java:213)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
at javax.swing.ImageIcon.<init>(Unknown Source)
at com.ema.viewer.MphModel.init(MphModel.java:152)
at com.ema.viewer.EmaViewer.init(EmaViewer.java:212)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)


Any idea for this? Thanks