Unable to compile class for JSP

[bnortman]

HTTP Status 500 - Unable to compile class for JSP:

type Exception report

message Unable to compile class for JSP:

description The server encountered an internal error that prevented it from fulfilling this request.

exception

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

An error occurred at line: 55 in the jsp file: /menu.jspf
'<>' operator is not allowed for source level below 1.7
52: ProjectHelper ph = ProjectHelper.getInstance(cfg);
53: Set projects = ph.getAllProjects();
54: if (projects == null) {
55: projects = new TreeSet<>();
56: }
57: int projectsSize = ph.getAllUngrouped().size();
58: if (ph.getGroups().size() > 0 && ph.getAllUngrouped().size() > 0)

An error occurred at line: 64 in the jsp file: /menu.jspf
'<>' operator is not allowed for source level below 1.7
61: projectsSize++;
62: projectsSize += ph.getAllGrouped(group).size();
63: }
64: TreeMap<String, String> pMap = new TreeMap<>();
65: QueryBuilder queryParams = cfg.getQueryBuilder();
66: if (projects.size() != 0) {
67: for (Project p : projects) {

Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:104)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:366)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:490)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:379)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:354)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:341)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:662)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:364)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.opensolaris.opengrok.web.AuthorizationFilter.doFilter(AuthorizationFilter.java:60)

[bnortman]

Tomcat is running on Oracle Java 8

tomcat7 22236 1 11 02:50 ? 00:00:17 /usr/lib/jvm/java-8-oracle/bin/java -Djava.util.logging.config.file=/var/lib/tomcat7/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.awt.headless=true -Xmx128m -XX:+UseConcMarkSweepGC -Djava.endorsed.dirs=/usr/share/tomcat7/endorsed -classpath /usr/share/tomcat7/bin/bootstrap.jar:/usr/share/tomcat7/bin/tomcat-juli.jar -Dcatalina.base=/var/lib/tomcat7 -Dcatalina.home=/usr/share/tomcat7 -Djava.io.tmpdir=/tmp/tomcat7-tomcat7-tmp org.apache.catalina.startup.Bootstrap start

[vladak]

Oooks like you are compiling with jsva older than 1.8.

We should check for java version in early stages of build.

[tulinkry]

Only Tomcat8 + java8

[bnortman]

Java is 1.8 for compile using ANT and running on Java 1.8. Both Oracle instance. I update the a couple lines like

projects = new TreeSet<>();
to
projects = new TreeSet<String>();

and now everything works.

[bnortman]

I just forked the code and updated the file to be more compatible.

bnortman@43a7baf

[vladak]

Let's keep this open to track the addition of Java version check for ant/maven.

[vladak]

Actually, ant/maven check will not help here - this is about JSP compilation in Tomcat, sorry for the confusion. Not sure if it is possible to check Java version in Tomcat when deploying the war.

Still, this looks like Tomcat misconfiguration. Even though it seems to be running Java 8, it tries to compile with Java 7.

[vladak]

Maybe you could check all available Java versions on the machine and if Java 7 (JDK or JRE) is installed, try to uninstall, restart Tomcat and see what happens (with the original unmodified files containing the diamond operator).