java.lang.IllegalStateException: Form too large

click Feedback>>Email to Support encounter error 500.
output log at end.

reason: size of image capture screen great than 200000
work-around: increase value of org.eclipse.jetty.server.Request.maxFormContentSize (default is 200000)

solution:current capture screen up to server by convert to base64 and post as textfield.
consider use upload method or how to user other content-type

message is:
WARNING: badMessage: java.lang.IllegalStateException: too much data after closed for HttpChannelOverHttp@134c5d11
{r=4,c=false,a=IDLE,uri=-}
Feb 26, 2015 11:33:48 PM org.eclipse.jetty.servlet.ServletHandler doHandle
WARNING: /webui/zkau
java.lang.IllegalStateException: Form too large: 208023 > 200000
at org.eclipse.jetty.server.Request.extractFormParameters(Request.java:364)
at org.eclipse.jetty.server.Request.extractContentParameters(Request.java:302)
at org.eclipse.jetty.server.Request.extractParameters(Request.java:256)
at org.eclipse.jetty.server.Request.getParameter(Request.java:827)
at org.zkoss.zk.au.http.DHtmlUpdateServlet$3.getDesktopId(DHtmlUpdateServlet.java:733)
at org.zkoss.zk.au.http.DHtmlUpdateServlet.process(DHtmlUpdateServlet.java:531)
at org.zkoss.zk.au.http.DHtmlUpdateServlet.doGet(DHtmlUpdateServlet.java:485)
at org.zkoss.zk.au.http.DHtmlUpdateServlet.doPost(DHtmlUpdateServlet.java:494)