Wrong description for * */2 * * *

[arunvelsriram]

For * */2 * * * the expected description should be something like "every minute of every second hour". But actual description that we are getting is "every 2 hours".

Sorry if this a know bug already. I searched the issues but can't find anything related.

[jmrozanec]

@arunvelsriram thank you for reporting this. May we ask you to send a PR with a test? Thanks! 😄

[mccartney]

When looking into it, I think the problem is with default handling of Always values. So for an expression like * */2 * * * the handling of more specific values (left of */2) and less specific values (right of */2) is the same. Namely empty String. While it should be different.

I am not fully sure, but I think it should be:

• ignore all * from the right, they result in empty String,
• all the rest should be handled and result in non-empty String.

i.e. https://github.com/jmrozanec/cron-utils/blob/864f9f09af58bd48133a1492a09fb7fbc1c5858b/src/main/java/com/cronutils/descriptor/DescriptionStrategy.java#L99 is too optimistic. It should have a conditional logic depending on what position of the expression is it.