The Essential Project Forum

Hi All

I've recently switch to a new MacBook Air M4 and I'm having a problem getting the import utility working. Everything else is working fine and I can publish from Protege to the essential viewer website. Below is the error I'm receiving when I try to access the website.

If it helps...I installed tomcat and java using homebrew. Initially i installed the latest version of java and subsequently installed java 8 using homebrew, which required me to install rosetta 2 before I could install java 8. When i run 'java -version' it says I'm running 24.0.1 however, homebrew shows that temurin@8 is installed. I have tried to run the 'jdk-8u202-macosx-x64' installer package but it fails to install.

Any help would be much appreciated.

Thanks

Ben

---- Error message ----
HTTP Status 500 – Internal Server Error
Type Exception Report

Message Servlet execution threw an exception

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

javax.servlet.ServletException: Servlet execution threw an exception
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
Root Cause

java.lang.NoClassDefFoundError: javax/xml/bind/JAXBContext
com.enterprise_architecture.essential.importutility.data.user.UserDataManager.<init>(UserDataManager.java:71)
com.enterprise_architecture.essential.importutility.data.user.UserDataManager.getUserManager(UserDataManager.java:111)
com.enterprise_architecture.essential.importutility.data.user.UserDataManager.getInstance(UserDataManager.java:97)
com.enterprise_architecture.essential.importutility.data.user.UserCredentialManager.<init>(UserCredentialManager.java:63)
com.enterprise_architecture.essential.importutility.data.user.UserCredentialManager.getInstance(UserCredentialManager.java:84)
com.enterprise_architecture.essential.importutility.data.user.UserCredentialManager.getInstance(UserCredentialManager.java:69)
com.enterprise_architecture.essential.importutility.ui.LogoutComposer.doAfterCompose(LogoutComposer.java:62)
org.zkoss.zk.ui.impl.UiEngineImpl.doAfterCompose(UiEngineImpl.java:619)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild0(UiEngineImpl.java:944)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:891)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:778)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:838)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:796)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreate(UiEngineImpl.java:742)
org.zkoss.zk.ui.impl.UiEngineImpl.createComponents(UiEngineImpl.java:1145)
org.zkoss.zk.ui.impl.AbstractExecution.createComponents0(AbstractExecution.java:355)
org.zkoss.zk.ui.impl.AbstractExecution.createComponents(AbstractExecution.java:322)
org.zkoss.zul.Include.afterCompose(Include.java:517)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild0(UiEngineImpl.java:942)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:891)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:778)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreate(UiEngineImpl.java:742)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild0(UiEngineImpl.java:936)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:891)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:778)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:838)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:796)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreate(UiEngineImpl.java:742)
org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage0(UiEngineImpl.java:463)
org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage(UiEngineImpl.java:371)
org.zkoss.zk.ui.http.DHtmlLayoutServlet.process(DHtmlLayoutServlet.java:220)
org.zkoss.zk.ui.http.DHtmlLayoutServlet.doGet(DHtmlLayoutServlet.java:146)
javax.servlet.http.HttpServlet.service(HttpServlet.java:529)
javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
Root Cause

java.lang.ClassNotFoundException: javax.xml.bind.JAXBContext
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1354)
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1163)
com.enterprise_architecture.essential.importutility.data.user.UserDataManager.<init>(UserDataManager.java:71)
com.enterprise_architecture.essential.importutility.data.user.UserDataManager.getUserManager(UserDataManager.java:111)
com.enterprise_architecture.essential.importutility.data.user.UserDataManager.getInstance(UserDataManager.java:97)
com.enterprise_architecture.essential.importutility.data.user.UserCredentialManager.<init>(UserCredentialManager.java:63)
com.enterprise_architecture.essential.importutility.data.user.UserCredentialManager.getInstance(UserCredentialManager.java:84)
com.enterprise_architecture.essential.importutility.data.user.UserCredentialManager.getInstance(UserCredentialManager.java:69)
com.enterprise_architecture.essential.importutility.ui.LogoutComposer.doAfterCompose(LogoutComposer.java:62)
org.zkoss.zk.ui.impl.UiEngineImpl.doAfterCompose(UiEngineImpl.java:619)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild0(UiEngineImpl.java:944)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:891)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:778)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:838)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:796)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreate(UiEngineImpl.java:742)
org.zkoss.zk.ui.impl.UiEngineImpl.createComponents(UiEngineImpl.java:1145)
org.zkoss.zk.ui.impl.AbstractExecution.createComponents0(AbstractExecution.java:355)
org.zkoss.zk.ui.impl.AbstractExecution.createComponents(AbstractExecution.java:322)
org.zkoss.zul.Include.afterCompose(Include.java:517)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild0(UiEngineImpl.java:942)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:891)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:778)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreate(UiEngineImpl.java:742)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild0(UiEngineImpl.java:936)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:891)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:778)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:838)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:796)
org.zkoss.zk.ui.impl.UiEngineImpl.execCreate(UiEngineImpl.java:742)
org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage0(UiEngineImpl.java:463)
org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage(UiEngineImpl.java:371)
org.zkoss.zk.ui.http.DHtmlLayoutServlet.process(DHtmlLayoutServlet.java:220)
org.zkoss.zk.ui.http.DHtmlLayoutServlet.doGet(DHtmlLayoutServlet.java:146)
javax.servlet.http.HttpServlet.service(HttpServlet.java:529)
javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
Note The full stack trace of the root cause is available in the server logs.

Apache Tomcat/9.0.105

Given the JAXB error, I suspect that either JVM or Tomcat version is missing a library. I can't think of a solution to that right now.

Have you tried using the Essential Standalone version? That contains an embedded JVM and certainly the Import Utility should work there.

Hi Neil

Thanks for your response and you were correct. I needed to copy JAXB and istack jar files to the tomcat lib folder.

All working perfectly now.

Ben