Flink SQL 作业, 开始运行正常, checkpoint也正常, 执行一段时间后,开始报错,

Flink SQL 作业, 开始运行正常, checkpoint也正常, 没有大状态(状态19.7KB), 但是执行一段时间后,开始报错, 然后恢复执行个几秒,也马上报这个错,然后报错恢复不停循环. 哪位帮忙看看,不胜感激.

2020-06-05 14:13:19,791 INFO org.apache.flink.runtime.taskmanager.Task - Source: KafkaTableSource(userId, utp, utrp, extendFields, requestTime) -> SourceConversion(table=[default_catalog.default_database.user_visit_trace, source: [KafkaTableSource(userId, utp, utrp, extendFields, requestTime)]], fields=[userId, utp, utrp, extendFields, requestTime]) -> Calc(select=[getItemId(extendFields) AS item_id, userId, requestTime], where=[((utp = _UTF-16LE'4':VARCHAR(2147483647) CHARACTER SET "UTF-16LE") AND (((CAST(requestTime) / 1000) FROM_UNIXTIME _UTF-16LE'yyyyMMdd') > _UTF-16LE'20200602') AND getItemId(extendFields) IS NOT NULL AND userId IS NOT NULL)]) -> LookupJoin(table=[JDBCTableSource(shop_id, user_id)], joinType=[InnerJoin], async=[false], lookup=[user_id=userId], where=[shop_id IS NOT NULL], select=[item_id, userId, requestTime, shop_id, user_id]) -> Calc(select=[(_UTF-16LE'reco_rt:' CONCAT ((CAST(requestTime) / 1000) FROM_UNIXTIME _UTF-16LE'yyyyMMdd') CONCAT _UTF-16LE':rt:feature:shop5item:cnt_show:' CONCAT shop_id CONCAT _UTF-16LE':' CONCAT item_id) AS redisKey, requestTime AS fieldName]) -> SinkConversionToTuple2 -> Sink: Unnamed (1/8) (ad7a2d51beccbb39f83ac2c16b923bd0) switched from RUNNING to FAILED. java.lang.Exception: Could not perform checkpoint 401 for operator Source: KafkaTableSource(userId, utp, utrp, extendFields, requestTime) -> SourceConversion(table=[default_catalog.default_database.user_visit_trace, source: [KafkaTableSource(userId, utp, utrp, extendFields, requestTime)]], fields=[userId, utp, utrp, extendFields, requestTime]) -> Calc(select=[getItemId(extendFields) AS item_id, userId, requestTime], where=[((utp = _UTF-16LE'4':VARCHAR(2147483647) CHARACTER SET "UTF-16LE") AND (((CAST(requestTime) / 1000) FROM_UNIXTIME _UTF-16LE'yyyyMMdd') > _UTF-16LE'20200602') AND getItemId(extendFields) IS NOT NULL AND userId IS NOT NULL)]) -> LookupJoin(table=[JDBCTableSource(shop_id, user_id)], joinType=[InnerJoin], async=[false], lookup=[user_id=userId], where=[shop_id IS NOT NULL], select=[item_id, userId, requestTime, shop_id, user_id]) -> Calc(select=[(_UTF-16LE'reco_rt:' CONCAT ((CAST(requestTime) / 1000) FROM_UNIXTIME _UTF-16LE'yyyyMMdd') CONCAT _UTF-16LE':rt:feature:shop5item:cnt_show:' CONCAT shop_id CONCAT _UTF-16LE':' CONCAT item_id) AS redisKey, requestTime AS fieldName]) -> SinkConversionToTuple2 -> Sink: Unnamed (1/8). at org.apache.flink.streaming.runtime.tasks.StreamTask.triggerCheckpoint(StreamTask.java:802) at org.apache.flink.streaming.runtime.tasks.StreamTask.lambda$triggerCheckpointAsync$3(StreamTask.java:777) at org.apache.flink.streaming.runtime.tasks.StreamTask$$Lambda$595/1311782208.call(Unknown Source) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$SynchronizedStreamTaskActionExecutor.run(StreamTaskActionExecutor.java:87) at org.apache.flink.streaming.runtime.tasks.mailbox.Mail.run(Mail.java:78) at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.processMail(MailboxProcessor.java:261) at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:186) at org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:487) at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:470) at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:707) at org.apache.flink.runtime.taskmanager.Task.run(Task.java:532) at java.lang.Thread.run(Thread.java:745) Caused by: java.lang.NullPointerException at org.apache.flink.streaming.runtime.tasks.StreamTask$CheckpointingOperation.executeCheckpointing(StreamTask.java:1411) at org.apache.flink.streaming.runtime.tasks.StreamTask.checkpointState(StreamTask.java:991) at org.apache.flink.streaming.runtime.tasks.StreamTask.lambda$performCheckpoint$5(StreamTask.java:887) at org.apache.flink.streaming.runtime.tasks.StreamTask$$Lambda$597/1708409807.run(Unknown Source) at org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$SynchronizedStreamTaskActionExecutor.runThrowing(StreamTaskActionExecutor.java:94) at org.apache.flink.streaming.runtime.tasks.StreamTask.performCheckpoint(StreamTask.java:860) at org.apache.flink.streaming.runtime.tasks.StreamTask.triggerCheckpoint(StreamTask.java:793) ... 12 more 2020-06-05 14:13:19,795 INFO org.apache.flink.runtime.taskmanager.Task - Attempting to fail task externally Source: KafkaTableSource(userId, utp, utrp, extendFields, requestTime) -> SourceConversion(table=[default_catalog.default_database.user_visit_trace, source: [KafkaTableSource(userId, utp, utrp, extendFields, requestTime)]], fields=[userId, utp, utrp, extendFields, requestTime]) -> Calc(select=[(_UTF-16LE'search_rt:' CONCAT ((CAST(requestTime) / 1000) FROM_UNIXTIME _UTF-16LE'yyyyMMdd') CONCAT _UTF-16LE':traffic:set:' CONCAT getItemId(extendFields)) AS redisKey, requestTime AS fieldName], where=[((utp = _UTF-16LE'4':VARCHAR(2147483647) CHARACTER SET "UTF-16LE") AND (((CAST(requestTime) / 1000) FROM_UNIXTIME _UTF-16LE'yyyyMMdd') > _UTF-16LE'20200602') AND getItemId(extendFields) IS NOT NULL)]) -> SinkConversionToTuple2 -> Sink: Unnamed (3/8) (e0452995af60f6ed941b8dedd078def3).

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