Resuming Externalized Checkpoint (r, inc, up) test instable

2018-11-18 12:34:44,476 INFO org.apache.flink.streaming.api.operators.AbstractStreamOperator - Could not complete snapshot 12 for operator ArtificalKeyedStateMapper_Kryo_and_Custom_Stateful (2/2). java.io.IOException: Cannot register Closeable, registry is already closed. Closing argument. at org.apache.flink.util.AbstractCloseableRegistry.registerCloseable(AbstractCloseableRegistry.java:85) at org.apache.flink.runtime.state.AsyncSnapshotCallable$AsyncSnapshotTask.<init>(AsyncSnapshotCallable.java:123) at org.apache.flink.runtime.state.AsyncSnapshotCallable$AsyncSnapshotTask.<init>(AsyncSnapshotCallable.java:111) at org.apache.flink.runtime.state.AsyncSnapshotCallable.toAsyncSnapshotFutureTask(AsyncSnapshotCallable.java:105) at org.apache.flink.contrib.streaming.state.snapshot.RocksIncrementalSnapshotStrategy.doSnapshot(RocksIncrementalSnapshotStrategy.java:164) at org.apache.flink.contrib.streaming.state.snapshot.RocksDBSnapshotStrategyBase.snapshot(RocksDBSnapshotStrategyBase.java:128) at org.apache.flink.contrib.streaming.state.RocksDBKeyedStateBackend.snapshot(RocksDBKeyedStateBackend.java:496) at org.apache.flink.streaming.api.operators.AbstractStreamOperator.snapshotState(AbstractStreamOperator.java:407) at org.apache.flink.streaming.runtime.tasks.StreamTask$CheckpointingOperation.checkpointStreamOperator(StreamTask.java:1113) at org.apache.flink.streaming.runtime.tasks.StreamTask$CheckpointingOperation.executeCheckpointing(StreamTask.java:1055) at org.apache.flink.streaming.runtime.tasks.StreamTask.checkpointState(StreamTask.java:729) at org.apache.flink.streaming.runtime.tasks.StreamTask.performCheckpoint(StreamTask.java:641) at org.apache.flink.streaming.runtime.tasks.StreamTask.triggerCheckpointOnBarrier(StreamTask.java:586) at org.apache.flink.streaming.runtime.io.BarrierBuffer.notifyCheckpoint(BarrierBuffer.java:396) at org.apache.flink.streaming.runtime.io.BarrierBuffer.processBarrier(BarrierBuffer.java:292) at org.apache.flink.streaming.runtime.io.BarrierBuffer.getNextNonBlocked(BarrierBuffer.java:200) at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:209) at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:105) at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:300) at org.apache.flink.runtime.taskmanager.Task.run(Task.java:704) at java.lang.Thread.run(Thread.java:748)