we upgraded from jenkins 2.47 to 2.50 since then nearly all of our ant build steps are failing.
I found out why :
We have following checks in our ANT Scripts:
Problem is we are using property
And "env" is suddenly empty - nothing else changed, ANT_HOME for example is set but check is failing.
I didn't find any clue in jenkins changelog or here in JIRA so im filing this isssue.