[jetty-users] Compiling jsp

[Andrea Cappelli <a.cappelli@xxxxxxxxx>]

Hi list,
I have a webapp which needs to compile some jsp

I tried the suggestions in

http://www.eclipse.org/jetty/documentation/current/configuring-jsp.html#compiling-jsps

to instruct jetty to use it's internal compiler, but I still get

org.apache.jasper.JasperException: Unable to compile class for JSP
	at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:97)
	at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:346)
	at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:414)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:472)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
	at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:696)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:526)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:586)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:221)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1110)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:453)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:183)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1044)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:261)
	at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:101)
	at it.mareinformatica.jamboBiglie.server.core.StampaServlet.service(StampaServlet.java:92)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:696)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1568)
	at org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter.doFilter(WebSocketUpgradeFilter.java:164)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1539)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:524)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:568)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:221)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1110)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:453)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:183)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1044)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:199)
	at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:109)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
	at org.eclipse.jetty.server.Server.handle(Server.java:459)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:280)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:229)
	at org.eclipse.jetty.io.AbstractConnection$1.run(AbstractConnection.java:505)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:607)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:536)
	at java.lang.Thread.run(Thread.java:744)
Caused by: Unable to find a javac compiler;
com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK
	at org.apache.tools.ant.taskdefs.compilers.CompilerAdapterFactory.getCompiler(CompilerAdapterFactory.java:105)
	at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:924)
	at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:757)
	at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:382)


Googling I found other "solution" proposed, from explicit setting 
JAVA_HOME to adding the directory which contains tools.jar to classpath, 
nothing worked for me

The only thing that worked was to copy the file tools.jar from 
$JDK/lib/tools.jar to $JDK/jre/lib/ext/tools.jar

I'm using

java version "1.7.0_45"
Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)

and jetty 9.1.0

Any hint appreciated

--
Andrea Cappelli