Cancel flink job occur exception

Hi all, I submit a flink job through yarn-cluster mode and cancel job with savepoint option immediately after job status change to deployed. Sometimes i met this error: org.apache.flink.util.FlinkException: Could not cancel job . at org.apache.flink.client.cli.CliFrontend.lamb

Cancel flink job occur exception.

Hi all, I submit a flink job through yarn-cluster mode and cancel job with savepoint option immediately after job status change to deployed. Sometimes i met this error: org.apache.flink.util.FlinkException: Could not cancel job . at org.apache.flink.client.cli.CliFrontend.lamb