Exception after batch launch => IllegalStateException: Failed to execute ApplicationRunner

[BugHunterPhilosopher]

Good evening,

I discovered your project this afternoon, so first: thanks a lot for this neat piece of code.

I have a first version of my code working, but * after * the batch has run, I have this stacktrace:

2020-10-05 17:50:47.476 ERROR 11864 --- [           main] o.s.boot.SpringApplication               : Application run failed

java.lang.IllegalStateException: Failed to execute ApplicationRunner
	at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:789) ~[spring-boot-2.3.4.RELEASE.jar:2.3.4.RELEASE]
	at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:776) ~[spring-boot-2.3.4.RELEASE.jar:2.3.4.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:322) ~[spring-boot-2.3.4.RELEASE.jar:2.3.4.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) ~[spring-boot-2.3.4.RELEASE.jar:2.3.4.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) ~[spring-boot-2.3.4.RELEASE.jar:2.3.4.RELEASE]
	at blah.main(BlahApplication.java:26) ~[classes/:na]
Caused by: java.lang.NullPointerException: null
	at org.springframework.batch.core.launch.support.SimpleJobLauncher.run(SimpleJobLauncher.java:104) ~[spring-batch-core-4.2.4.RELEASE.jar:4.2.4.RELEASE]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
	at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344) ~[spring-aop-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198) ~[spring-aop-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration$PassthruAdvice.invoke(SimpleBatchConfiguration.java:127) ~[spring-batch-core-4.2.4.RELEASE.jar:4.2.4.RELEASE]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) ~[spring-aop-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at com.sun.proxy.$Proxy78.run(Unknown Source) ~[na:na]
	at org.springframework.boot.autoconfigure.batch.JobLauncherApplicationRunner.execute(JobLauncherApplicationRunner.java:199) ~[spring-boot-autoconfigure-2.3.4.RELEASE.jar:2.3.4.RELEASE]
	at org.springframework.boot.autoconfigure.batch.JobLauncherApplicationRunner.executeLocalJobs(JobLauncherApplicationRunner.java:173) ~[spring-boot-autoconfigure-2.3.4.RELEASE.jar:2.3.4.RELEASE]
	at org.springframework.boot.autoconfigure.batch.JobLauncherApplicationRunner.launchJobFromProperties(JobLauncherApplicationRunner.java:160) ~[spring-boot-autoconfigure-2.3.4.RELEASE.jar:2.3.4.RELEASE]
	at org.springframework.boot.autoconfigure.batch.JobLauncherApplicationRunner.run(JobLauncherApplicationRunner.java:155) ~[spring-boot-autoconfigure-2.3.4.RELEASE.jar:2.3.4.RELEASE]
	at org.springframework.boot.autoconfigure.batch.JobLauncherApplicationRunner.run(JobLauncherApplicationRunner.java:150) ~[spring-boot-autoconfigure-2.3.4.RELEASE.jar:2.3.4.RELEASE]
	at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:786) ~[spring-boot-2.3.4.RELEASE.jar:2.3.4.RELEASE]
	... 5 common frames omitted

Do you have any idea why this occurs, please? You'll find attached my main files.

Thanks in advance & Regards

neo4japp.zip

[valb3r]

Hello @BugHunterPhilosopher
The reason it happens is that
https://github.com/valb3r/springbatch-neo4j-adapter/blob/master/neo4j-adapter/src/main/java/com/github/valb3r/springbatch/adapters/neo4j/config/Neo4jBatchConfigurer.java
does not autowire repository to SimpleJobLauncher here:

 @Override
    public JobLauncher getJobLauncher() {
        return new SimpleJobLauncher();
    }

The idea was to avoid launching jobs from SimpleJobLauncher and using job.execute for production this is of course is a bug, but you can disable this behavior by application property:

spring:
  batch:
    job:
      enabled: false

[valb3r]

Here is the example project with the correct setup:

example.zip

[valb3r]

Done, to be released

[BugHunterPhilosopher]

Thanks a lot, I'll try this. Sorry for the delay.

[BugHunterPhilosopher]

Could you please cut a 1.0.4 release?

[valb3r]

@BugHunterPhilosopher Done, release 0.1.4 is available in BinTray

[BugHunterPhilosopher]

Thanks a ton! I've just checked my batch with the 0.1.4 release and it all works. Cheers!