spring cron scheduled not running in the second day

Question

I was tried to implement scheduler with setting for every day. Then I build to a jar file and running with "java -jar". I trying on my computer to still alive until 2 days for test it. Yesterday it's works. But when I look today is not running. Refer from this https://riptutorial.com/spring/example/21209/cron-expression.

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableScheduling;

@SpringBootApplication
@EnableScheduling
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

}

import java.text.SimpleDateFormat;
import java.util.Date;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

@Component
public class Scheduler {

    private static final Logger log = LoggerFactory.getLogger(Scheduler.class);

    @Scheduled(cron = "0 0 18 * * ?")
    public void currentTime() {
        SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");
        log.info("Current Time      = {}", dateFormat.format(new Date()));
        log.info("Excel File has been generated");
    }

}

this log on the second day

It's not recommended to post screenshots of the code, better add code snippet. — Sandeep Kumar
Do you have some other scheduled tasks running as well? Since @Scheduled runs by default on single thread, it may be possible that other task is not allowing this task to run. — Ganesh Modak

Deep Dalsania Deep Dalsania · Accepted Answer · 2020-05-11T02:23:45

I saw your images and I tested your cron expression here and It gives an error i.e Support for specifying both a day-of-week AND a day-of-month parameter is not implemented.
Right Cron Expression
0 30 16 * * ?
It specify that Your job is trigger 16:30: 00 pm every day.
Also as per @Jason's answer you also have to use @EnableScheduling to your configuration class.

Reference: Cron Expression

spring cron scheduled not running in the second day

2 Answers