Hello DSpace Community,

I cannot get the DSpace 6.3 REST-API working in Ubuntu 18.04 and 18.10. The 
REST-API worked in Ubuntu 17.10, but after upgrading or installing a later 
version, it stopped working.

The Tomcat Web Application Manager gives me "FAIL - Application at context 
path [/rest] could not be started", when I try to start it manually and in 
/var/log/tomcat8/localhost.2018-10-23.log I get the following error message:

23-Oct-2018 14:57:48.013 SEVERE [http-nio-8080-exec-7] 
org.apache.catalina.core.StandardContext.listenerStart Exception sending 
context initialized event to 
listener instance of class [org.dspace.app.util.DSpaceWebappListener] 
org.dspace.core.exception.DatabaseSchemaValidationException: The schema 
validator returned: Error activating Bean Validation integration 
       at org.dspace.core.Context.init(Context.java:170) 
       at org.dspace.core.Context.<init>(Context.java:126) 
       at 
org.dspace.app.util.AbstractDSpaceWebapp.register(AbstractDSpaceWebapp.java:74) 
       at 
org.dspace.app.util.DSpaceWebappListener.contextInitialized(DSpaceWebappListener.java:31)
 
       at 
org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4776)
 
       at 
org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5240)
 
       at 
org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) 
       at 
org.apache.catalina.manager.ManagerServlet.start(ManagerServlet.java:1349) 
       at 
org.apache.catalina.manager.HTMLManagerServlet.start(HTMLManagerServlet.java:679)
 
       at 
org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:217)
 
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:661) 
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) 
       at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
 
       at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
 
       at 
org.apache.catalina.filters.CsrfPreventionFilter.doFilter(CsrfPreventionFilter.java:136)
 
       at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
 
       at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
 
       at 
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) 
       at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
 
       at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
 
       at 
org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108)
 
       at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
 
       at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
 
       at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
 
       at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
 
       at 
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:613)
 
       at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) 
       at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) 
       at 
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
 
       at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
 
       at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) 
       at 
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803) 
       at 
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
 
       at 
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:800)
 
       at 
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1463)
 
       at 
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) 
       at 
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
 
       at 
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
 
       at 
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
 
       at java.base/java.lang.Thread.run(Thread.java:844)



Any ideas on how to get the REST-API running again?

Best regards,
Christoph

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