[CRON] Failed: apache/flink#42477 (master - 6a160d7)

[Flink CI]

apache / flink master Build #42477 failed 35 hrs, 44 mins, 16 secs Roman Khachatryan 6a160d7 CHANGESET → [FLINK-12484][runtime] push checkpoint lock from StreamTask to SourceStream Intermediate tasks (not source/sink) don't acquire lock anymore (as they use single-threaded model). SourceStreamTask still has to have the lock to conform to the public API. MockStreamTask has the lock for compatibility with the existing tests.