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java.lang.IllegalArgumentException: !hex:25	at org.eclipse.jetty.util.TypeUtil.convertHexDigit(TypeUtil.java:364)	at org.eclipse.jetty.util.UrlEncoded.decodeUtf8To(UrlEncoded.java:329)	at org.eclipse.jetty.http.HttpURI.decodeQueryTo(HttpURI.java:638)	at org.eclipse.jetty.server.Request.extractParameters(Request.java:213)	at org.eclipse.jetty.server.Request.getParameter(Request.java:679)	at com.example.EchoServlet.handle(EchoServlet.java:29)	at com.example.EchoServlet.doGet(EchoServlet.java:24)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:565)	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:479)	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:524)