我也遇到过这个问题，这个可能是 checkpoint 的 bug，我修改了下 flink 源码后不报错了，可以参考下这个patch https://github.com/yuchuanchen/flink/commit/e5122d9787be1fee9bce141887e0d70c9b0a4f19
在 2020-06-05 15:06:48，"hb" <343122...@163.com> 写道： >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). >
