Solution to the Problem of calling awt in Linux

Solution to the Problem of calling awt in Linux-Linux Enterprise Application-Linux server application information. The following is a detailed description. Images on the website suddenly become inaccessible and become red-handed, with similar exceptions:

HTTP Status 500-

Type Exception report

Message

Description The server encountered an internal error () that prevented it from fulfilling this request.

Exception

Javax. servlet. ServletException
Org. apache. jasper. runtime. PageContextImpl. doHandlePageException (PageContextImpl. java: 825)
Org. apache. jasper. runtime. PageContextImpl. handlePageException (PageContextImpl. java: 758)
Org. apache. jsp. Imaging_005fToWeb_jsp. _ jspService (Imaging_005fToWeb_jsp.java: 106)
Org. apache. jasper. runtime. HttpJspBase. service (HttpJspBase. java: 94)
Javax. servlet. http. HttpServlet. service (HttpServlet. java: 802)
Org. apache. jasper. servlet. JspServletWrapper. service (JspServletWrapper. java: 324)
Org. apache. jasper. servlet. JspServlet. serviceJspFile (JspServlet. java: 292)
Org. apache. jasper. servlet. JspServlet. service (JspServlet. java: 236)
Javax. servlet. http. HttpServlet. service (HttpServlet. java: 802)

This problem occurs only in unix or unix-like linux and may occur when the awt method is called (awt is used in showimage. jsp). solution:

Add this sentence to the jboss STARTUP script run. sh-Djava. awt. headless = true

# Setup JBoss sepecific properties
JAVA_OPTS = "$ JAVA_OPTS-Dprogram. name = $ PROGNAME-Djava. awt. headless = true"