We have a web application which uses CRON4J scheduling. The Jobs are running twice for same scheduling time. can anybody know why?

Question

We have a web application which uses CRON4J scheduling. The Jobs are running twice for same scheduling time. can anybody know why? we deployed this app on tomcat.

Answer 1

You are definitely registering the Task twice. May be there is another copy of your war deployed, so you actually have 2 instances of your application running ?

Answer 2

If you scheduler is defined in the context listener, check how many times have you defined the context. It will be executed for each context . You can have multiple context if you use virtual host, or if you define one context in the war (META-INF/context.xml) and other in server.xml (you should not define context here).