Premature end of file error- site down

Greetings all,

We have a site that is down and is showing the error:

javax.servlet.ServletException: Premature end of file.

Can someone assist in troubleshooting please?

lucee.runtime.exp.NativeException.newInstance(NativeException.java:73)
lucee.runtime.op.Caster.toPageException(Caster.java:3201)
lucee.runtime.op.Caster.toPageException(Caster.java:3176)
lucee.runtime.config.ConfigImpl.setScheduler(ConfigImpl.java:1572)
lucee.runtime.config.XMLConfigWebFactory.loadScheduler(XMLConfigWebFactory.java:4066)
lucee.runtime.config.XMLConfigWebFactory.load(XMLConfigWebFactory.java:482)
lucee.runtime.config.XMLConfigWebFactory.newInstance(XMLConfigWebFactory.java:286)
lucee.runtime.engine.CFMLEngineImpl.loadJSPFactory(CFMLEngineImpl.java:780)
lucee.runtime.engine.CFMLEngineImpl.addServletConfig(CFMLEngineImpl.java:676)
lucee.loader.engine.CFMLEngineWrapper.addServletConfig(CFMLEngineWrapper.java:88)
lucee.loader.engine.CFMLEngineFactory.getInstance(CFMLEngineFactory.java:223)
lucee.loader.servlet.CFMLServlet.init(CFMLServlet.java:42)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:486)
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455)
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:748)

Please always post version numbers of your stack

I’d suggest updating your software stack to the latest stable releases, as there’s a good chance it’s already been addressed?

i.e. Lucee 5.2.9.31 and Java 1.8.0_191

Ok. Would you suggest updating to the latest in one step?
What about the extensions?

i’d try just updating lucee first, of all the upgrades, it’s the most easily reversible and hopefully the most likely to solve your problem.