Task org.apache.jackrabbit.oak.commons.concurrent.NotifyingFutureTask@1e06031c[Not completed, task = org.apache.jackrabbit.oak.spi.commit.BackgroundObserver$1$1@1a399483] rejected from java.util.concurrent.ThreadPoolExecutor@5b049eb8[Shutting down, pool size = 1, active threads = 1, queued tasks = 0, completed tasks = 9]