java - NullPointerException when creating a Scheduler Bean with Spring -


i trying use spring create scheduler.

@configuration @enablescheduling public class myscheduler {     @autowired   mybusinessservice businessservice;     @scheduled(cron = "* * * * * *")   public void mycronmethod() {    } }

during application startup following error:

java.lang.nullpointerexception     @ org.springframework.scheduling.annotation.scheduledannotationbeanpostprocessor.resolveschedulerbean(scheduledannotationbeanpostprocessor.java:281)     @ org.springframework.scheduling.annotation.scheduledannotationbeanpostprocessor.finishregistration(scheduledannotationbeanpostprocessor.java:221)     @ org.springframework.scheduling.annotation.scheduledannotationbeanpostprocessor.onapplicationevent(scheduledannotationbeanpostprocessor.java:200)     @ org.springframework.scheduling.annotation.scheduledannotationbeanpostprocessor.onapplicationevent(scheduledannotationbeanpostprocessor.java:94)     @ org.springframework.context.event.simpleapplicationeventmulticaster.invokelistener(simpleapplicationeventmulticaster.java:167)     @ org.springframework.context.event.simpleapplicationeventmulticaster.multicastevent(simpleapplicationeventmulticaster.java:139)     @ org.springframework.context.support.abstractapplicationcontext.publishevent(abstractapplicationcontext.java:383)     @ org.springframework.context.support.abstractapplicationcontext.publishevent(abstractapplicationcontext.java:337)     @ org.springframework.context.support.abstractapplicationcontext.finishrefresh(abstractapplicationcontext.java:882)     @ org.springframework.context.support.abstractapplicationcontext.refresh(abstractapplicationcontext.java:545)     @ org.springframework.web.context.contextloader.configureandrefreshwebapplicationcontext(contextloader.java:444)     @ org.springframework.web.context.contextloader.initwebapplicationcontext(contextloader.java:326)     @ org.springframework.web.context.contextloaderlistener.contextinitialized(contextloaderlistener.java:107)     @ org.apache.catalina.core.standardcontext.listenerstart(standardcontext.java:5068)     @ org.apache.catalina.core.standardcontext.startinternal(standardcontext.java:5584)     @ org.apache.catalina.util.lifecyclebase.start(lifecyclebase.java:147)     @ org.apache.catalina.core.containerbase$startchild.call(containerbase.java:1572)     @ org.apache.catalina.core.containerbase$startchild.call(containerbase.java:1562)     @ java.util.concurrent.futuretask.run(futuretask.java:266)     @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1142)     @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:617)     @ java.lang.thread.run(thread.java:745)

in scheduledannotationbeanpostprocessor holder null:

namedbeanholder<t> holder = ((autowirecapablebeanfactory) this.beanfactory).resolvenamedbean(schedulertype);

the schedulertype is:

interface org.springframework.scheduling.taskscheduler

the application jsf application. im using java 8 , spring version 4.3.6, ant , without dependency management, missing libraries or library mismatch possibility.

having had same error in kotlin application, workaround manually add taskscheduler application configuration:

the java example taken from here.

@bean public threadpooltaskscheduler threadpooltaskscheduler(){     threadpooltaskscheduler threadpooltaskscheduler       = new threadpooltaskscheduler();     threadpooltaskscheduler.setpoolsize(5);     threadpooltaskscheduler.setthreadnameprefix(       "threadpooltaskscheduler");     return threadpooltaskscheduler; }

my kotlin version is

@bean fun threadpooltaskscheduler()     = threadpooltaskscheduler().apply {         setpoolsize(5)         setthreadnameprefix("threadpooltaskscheduler") }

(i've not yet tried it, believe upgrading spring 5 fix - this commit throws exception null pointer have been generated.)


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