????????
hadoop??????????Kerberos???????????? Flink on Yarn ??Per-job?????????????? ??????????????????HDFS_DELEGATION_TOKEN?????????? checkpoint???????????? ?????????????????? 2019-12-02 00:00:00.283 ERROR org.apache.flink.yarn.YarnResourceManager - Could not start TaskManager in container container_e39_1563434037485_0606_01_552751. org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.token.SecretManager$InvalidToken): token (token for BDATA_UME_ADM: HDFS_DELEGATION_TOKEN owner=bdata_ume_...@travelsky.bdp.com, renewer=yarn, realUser=, issueDate=1574414126899, maxDate=1575018926899, sequenceNumber=800, masterKeyId=225) can't be found in cache
