Why isn't this SalesforceCanvasFrameworkSDK “Hello World” application for SFDC Canvas working?

Question

Currently I'm looking in the Force.com Canvas Developer's Guide at "Chapter 3: Quick Start--Advanced".

I've successfully cloned SalesforceCanvasFrameworkSDK from GitHub, and am now trying to Run the Web App Locally.

The build is successful and keystore has been created. However, when I execute target\bin\webapp.bat, I get the following error:

Error: Could not find or load main class Main

Find that the main class seems to be in C:\SalesforceCanvasFrameworkSDK\target\classes, I modified the .bat file, to include this in the CLASSPATH:

set CLASSPATH="C:\SalesforceCanvasFrameworkSDK\target\classes;%BASEDIR%"\etc;"%REPO%"\javax\servlet\servlet-api\2.5\servlet-api-2.5.jar;"%REPO%"\org\mortbay\jetty\jsp-2.1-glassfish\2.1.v20100127\jsp-2.1-glassfish-2.1.v20100127.jar;"%REPO%"\org\eclipse\jdt\core\compiler\ecj\3.5.1\ecj-3.5.1.jar;"%REPO%"\org\mortbay\jetty\jsp-api-2.1-glassfish\2.1.v20100127\jsp-api-2.1-glassfish-2.1.v20100127.jar;"%REPO%"\ant\ant\1.6.5\ant-1.6.5.jar;"%REPO%"\org\codehaus\jackson\jackson-mapper-asl\1.9.0\jackson-mapper-asl-1.9.0.jar;"%REPO%"\org\codehaus\jackson\jackson-core-asl\1.9.0\jackson-core-asl-1.9.0.jar;"%REPO%"\org\eclipse\jetty\jetty-webapp\7.6.0.v20120127\jetty-webapp-7.6.0.v20120127.jar;"%REPO%"\org\eclipse\jetty\jetty-xml\7.6.0.v20120127\jetty-xml-7.6.0.v20120127.jar;"%REPO%"\org\eclipse\jetty\jetty-util\7.6.0.v20120127\jetty-util-7.6.0.v20120127.jar;"%REPO%"\org\eclipse\jetty\jetty-servlet\7.6.0.v20120127\jetty-servlet-7.6.0.v20120127.jar;"%REPO%"\org\eclipse\jetty\jetty-security\7.6.0.v20120127\jetty-security-7.6.0.v20120127.jar;"%REPO%"\org\eclipse\jetty\jetty-server\7.6.0.v20120127\jetty-server-7.6.0.v20120127.jar;"%REPO%"\org\eclipse\jetty\jetty-continuation\7.6.0.v20120127\jetty-continuation-7.6.0.v20120127.jar;"%REPO%"\org\eclipse\jetty\jetty-http\7.6.0.v20120127\jetty-http-7.6.0.v20120127.jar;"%REPO%"\org\eclipse\jetty\jetty-io\7.6.0.v20120127\jetty-io-7.6.0.v20120127.jar;"%REPO%"\asm\asm\3.2\asm-3.2.jar;"%REPO%"\org\json\json\20080701\json-20080701.jar;"%REPO%"\commons-httpclient\commons-httpclient\3.1\commons-httpclient-3.1.jar;"%REPO%"\commons-logging\commons-logging\1.0.4\commons-logging-1.0.4.jar;"%REPO%"\commons-codec\commons-codec\1.4\commons-codec-1.4.jar;"%REPO%"\sfdc\sfdc-canvas-sdk\1.0-SNAPSHOT\sfdc-canvas-sdk-1.0-SNAPSHOT.jar

This enables the batch file to execute and initiate Jetty.

However, when I attempt to visit https://localhost:8443/examples/hello-world/index.jsp, after getting past the browser warning message, I get an HTTP ERROR 500 page:

HTTP ERROR 500

Problem accessing /examples/hello-world/index.jsp. Reason:

PWC6033: Unable to compile class for JSP

PWC6199: Generated servlet error: The type java.util.Map$Entry cannot be resolved. It is indirectly referenced from required .class files

Caused by:

org.apache.jasper.JasperException: PWC6033: Unable to compile class for JSP

PWC6199: Generated servlet error: The type java.util.Map$Entry cannot be resolved. It is indirectly referenced from required .class files

at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:123) at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:296) at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:376) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:437) at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:608) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:360) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:486) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:380) 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:521) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1031) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:406) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:965) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:111) at org.eclipse.jetty.server.Server.handle(Server.java:349) at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:449) at org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:47) at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:910) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:634) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:230) at org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:66) at org.eclipse.jetty.server.bio.SocketConnector$ConnectorEndPoint.run(SocketConnector.java:254) at org.eclipse.jetty.server.ssl.SslSocketConnector$SslConnectorEndPoint.run(SslSocketConnector.java:665) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:599) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:534) at java.lang.Thread.run(Thread.java:745) Powered by Jetty://

Concurrently, my Jetty server dies with:

ERROR: Compilation error org.eclipse.jdt.internal.compiler.classfmt.ClassFormatException at org.eclipse.jdt.internal.compiler.classfmt.ClassFileReader.(ClassFileReader.java:372) at org.apache.jasper.compiler.JDTJavaCompiler$1.findType(JDTJavaCompiler.java:367) at org.apache.jasper.compiler.JDTJavaCompiler$1.findType(JDTJavaCompiler.java:324) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:102) at org.eclipse.jdt.internal.compiler.lookup.UnresolvedReferenceBinding.resolve(UnresolvedReferenceBinding.java:49) at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.resolveType(BinaryTypeBinding.java:122) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.getTypeFromTypeSignature(LookupEnvironment.java:1188) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.getTypeFromVariantTypeSignature(LookupEnvironment.java :1244) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.getTypeArgumentsFromSignature(LookupEnvironment.java:1 031) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.getTypeFromTypeSignature(LookupEnvironment.java:1193) at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.createMethod(BinaryTypeBinding.java:495) at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.createMethods(BinaryTypeBinding.java:577) at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.cachePartsFrom(BinaryTypeBinding.java:327) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.createBinaryTypeFrom(LookupEnvironment.java:640) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.createBinaryTypeFrom(LookupEnvironment.java:619) at org.eclipse.jdt.internal.compiler.Compiler.accept(Compiler.java:295) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:133) at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:183) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.findImport(CompilationUnitScope.java:465) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.findSingleImport(CompilationUnitScope.java:519) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.faultInImports(CompilationUnitScope.java:368) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.faultInTypes(CompilationUnitScope.java:444) at org.eclipse.jdt.internal.compiler.Compiler.process(Compiler.java:752) at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:464) at org.apache.jasper.compiler.JDTJavaCompiler.compile(JDTJavaCompiler.java:503) at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:368) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:437) at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:608) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:360) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:486) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:380) 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:521) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1031) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:406) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:965) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:111) at org.eclipse.jetty.server.Server.handle(Server.java:349) at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:449) at org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:47) at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:910) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:634) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:230) at org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:66) at org.eclipse.jetty.server.bio.SocketConnector$ConnectorEndPoint.run(SocketConnector.java:254) at org.eclipse.jetty.server.ssl.SslSocketConnector$SslConnectorEndPoint.run(SslSocketConnector.java:665) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:599) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:534) at java.lang.Thread.run(Thread.java:745) ERROR: Error compiling file: C:\Users\[e-mail]\AppData\Local\Temp\jetty-0.0.0.0-8443-webapp-_-any-\jsp\org\apa che\jsp\examples\hello_002dworld\index_jsp.java 2014-12-11 15:35:48.106:WARN:oejs.ServletHandler:/examples/hello-world/index.jsp org.apache.jasper.JasperException: PWC6033: Unable to compile class for JSP||PWC6199: Generated servlet error:|The type java .util.Map$Entry cannot be resolved. It is indirectly referenced from required .class files|| at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:123) at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:296) at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:376) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:437) at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:608) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:360) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:486) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:380) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:565) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:479) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:521) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1031) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:406) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:965) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:111) at org.eclipse.jetty.server.Server.handle(Server.java:349) at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:449) at org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:47) at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:910) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:634) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:230) at org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:66) at org.eclipse.jetty.server.bio.SocketConnector$ConnectorEndPoint.run(SocketConnector.java:254) at org.eclipse.jetty.server.ssl.SslSocketConnector$SslConnectorEndPoint.run(SslSocketConnector.java:665) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:599) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:534) at java.lang.Thread.run(Thread.java:745)

If it is relevant:

OS: Windows 7 Java: 1.8.0_25 Maven: 3.2.2

Any help to resolve this will be appreciated!

Answer 1

I was able to fix this as follows on MacOS Sierra 10.13.6

The problem does seem to be with Java 8, so if you can start the whole installation with Java 7, you'll save a lot of time. In my case, I had already installed Java 8, so I had to do the following:

1- Install java 7 from: https://www.oracle.com/technetwork/java/javase/downloads/java-archive-downloads-javase7-521261.html . You have to create an Oracle account, it's free.

2- Confirm both versions of java are runningv

Pablos-MacBook-Pro:SalesforceCanvasFrameworkSDK pabloalvarez$ /usr/libexec/java_home -V
Matching Java Virtual Machines (2):
    1.8.0_191, x86_64:  "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_191.jdk/Contents/Home
    1.7.0_80, x86_64:   "Java SE 7" /Library/Java/JavaVirtualMachines/jdk1.7.0_80.jdk/Contents/Home

3- Then

export JAVA_HOME=`/usr/libexec/java_home -v 1.7.0_80`
export JAVACMD=`/usr/libexec/java_home -v 1.7.0_80`

Confirm that Java 7 is the default version now

Pablos-MacBook-Pro:SalesforceCanvasFrameworkSDK pabloalvarez$ java -version
java version "1.7.0_80"
Java(TM) SE Runtime Environment (build 1.7.0_80-b15)
Java HotSpot(TM) 64-Bit Server VM (build 24.80-b11, mixed mode)

5- Then

export JAVACMD=/usr/bin/java

6- Finally

Pablos-MacBook-Pro:SalesforceCanvasFrameworkSDK pabloalvarez$ sh target/bin/webapp
Looks like we are NOT running on heroku.
2019-01-14 10:54:48.557:INFO:oejs.Server:jetty-7.6.0.v20120127
2019-01-14 10:54:48.863:INFO:oejsh.ContextHandler:started o.e.j.w.WebAppContext{/,file:/Users/pabloalvarez/SalesforceCanvasFrameworkSDK/src/main/webapp/}
2019-01-14 10:54:49.252:INFO:oejus.SslContextFactory:Enabled Protocols [SSLv2Hello, TLSv1, TLSv1.1, TLSv1.2] of [SSLv2Hello, SSLv3, TLSv1, TLSv1.1, TLSv1.2]

Good luck!