这种情况有什么好的解决办法吗？

我这边job manager的日志打印到了最后一个库表，但是task同步数据在第五个库时就已经停止了，在同步第五个库时job manager的垃圾回收特别频繁。第五个库就是大宽表

这种情况有什么好的解决办法吗？ 我这里checkpoint 大小每次要达到1gb 就会报错 java.util.concurrent.CancellationException: null at java.util.concurrent.FutureTask.report(FutureTask.java:121) ~[?:1.8.0_181] at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_181] at org.apache.flink.runtime.concurrent.FutureUtils.runIfNotDoneAndGet(FutureUtils.java:636) ~[flink-dist_2.11-1.13.2.jar:1.13.2] at org.apache.flink.streaming.api.operators.OperatorSnapshotFinalizer.(OperatorSnapshotFinalizer.java:54) ~[flink-dist_2.11-1.13.2.jar:1.13.2] at org.apache.flink.streaming.runtime.tasks.AsyncCheckpointRunnable.run(AsyncCheckpointRunnable.java:128) [flink-dist_2.11-1.13.2.jar:1.13.2] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_181] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_181] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_181]