Spurious ClassNotFound Exception during maven builds

I first observed this behavior on our build server running Jenkins. We have two build jobs, building snapshot versions. Project A and B. Project B depends on A. Always dealing with snapshots. Jenkins ran the standard mvn clean install command. Now, when both jobs were running in parallel on Jenkins, sometimes project B failed during compilation or running unit tests with weird ClassNotFound exceptions. The missing classes were from project A, of course.


Easter date calculations

When you create a calendar, like OOoCalendar, it’s nice, if the calendar already calculates holidays. One of the holidays, that is every year on a somewhat different date is Easter. There are many other Christian holidays that depend on the Easter day like 40 days after Easter is Ascension Day.


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