Unable to open server console

Document ID : KB000044427
Last Modified Date : 14/02/2018
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Problem: 

  All components in environment are running fine, but not able to launch any console (Devtest, EnterpriseDashboard, protal) from browser.

Cause: 

     From log file, noticed below error in log file. In each log file, we see below error. 

   2016-06-27 01:28:52,241Z (21:28) [Thread-27] WARN org.eclipse.jetty.util.component.AbstractLifeCycle - FAILED o.e.j.w.WebAppContext@56503a{/,file:/E:/CA/DevTest/webserver/dradis/root/,null}: java.lang.NoSuchMethodError: org.eclipse.jetty.webapp.WebAppContext.getObjectFactory()Lorg/eclipse/jetty/util/DecoratedObjectFactory;

java.lang.NoSuchMethodError: org.eclipse.jetty.webapp.WebAppContext.getObjectFactory()Lorg/eclipse/jetty/util/DecoratedObjectFactory;

at org.eclipse.jetty.plus.webapp.PlusConfiguration.preConfigure(PlusConfiguration.java:51)

at org.eclipse.jetty.webapp.WebAppContext.preConfigure(WebAppContext.java:481)

    In general, this error will occurs, if any external jar files are copied to <Devtest_home>/hotdeploy folder. These external jars are overwriting existing devtest functionality. 

Resolution/Workaround:

   If possible, take backup of external jars available in hotdeploy folder and remove it from this directory and restart the components. Once everything works fine, find out which external jar is causing an issue by replacing files individually.