标签:java 集锦 flink 问题 streaming FlinkCDC apache org runtime
1. MySQL的账号权限问题
Caused by: java.sql.SQLSyntaxErrorException: Access denied; you need (at least one of) the RELOAD privilege(s) for this operation
解决方案:https://www.cnblogs.com/30go/p/15808632.html
2. 指定StartupOptions.latest() 会出现检查点保存空指针异常问题
这个场景是从MySQL到Kafka,设置了ck,MySQL的读取设置的是 StartupOptions.latest()
报错异常如下:
Caused by: org.apache.flink.runtime.checkpoint.CheckpointException: Could not complete snapshot 4 for operator Source: Custom Source (1/1)#3. Failure reason: Checkpoint was declined. at org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.snapshotState(StreamOperatorStateHandler.java:241) at org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.snapshotState(StreamOperatorStateHandler.java:162) at org.apache.flink.streaming.api.operators.AbstractStreamOperator.snapshotState(AbstractStreamOperator.java:371) at org.apache.flink.streaming.runtime.tasks.SubtaskCheckpointCoordinatorImpl.checkpointStreamOperator(SubtaskCheckpointCoordinatorImpl.java:697) at org.apache.flink.streaming.runtime.tasks.SubtaskCheckpointCoordinatorImpl.buildOperatorSnapshotFutures(SubtaskCheckpointCoordinatorImpl.java:618) at org.apache.flink.streaming.runtime.tasks.SubtaskCheckpointCoordinatorImpl.takeSnapshotSync(SubtaskCheckpointCoordinatorImpl.java:583) at org.apache.flink.streaming.runtime.tasks.SubtaskCheckpointCoordinatorImpl.checkpointState(SubtaskCheckpointCoordinatorImpl.java:309) at org.apache.flink.streaming.runtime.tasks.StreamTask.lambda$performCheckpoint$9(StreamTask.java:1013) at org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$SynchronizedStreamTaskActionExecutor.runThrowing(StreamTaskActionExecutor.java:93) at org.apache.flink.streaming.runtime.tasks.StreamTask.performCheckpoint(StreamTask.java:997) at org.apache.flink.streaming.runtime.tasks.StreamTask.triggerCheckpointAsyncInMailbox(StreamTask.java:921) ... 10 more Caused by: java.lang.NullPointerException at com.alibaba.ververica.cdc.debezium.DebeziumSourceFunction.snapshotOffsetState(DebeziumSourceFunction.java:262) at com.alibaba.ververica.cdc.debezium.DebeziumSourceFunction.snapshotState(DebeziumSourceFunction.java:240) at org.apache.flink.streaming.util.functions.StreamingFunctionUtils.trySnapshotFunctionState(StreamingFunctionUtils.java:118) at org.apache.flink.streaming.util.functions.StreamingFunctionUtils.snapshotFunctionState(StreamingFunctionUtils.java:99) at org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.snapshotState(AbstractUdfStreamOperator.java:89) at org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.snapshotState(StreamOperatorStateHandler.java:205) ... 20 more
按道理说,从最新的记录开始,如果没有最新的,那么应该是等待状态的,所以这里不知道为啥会报异常。
把 StartupOptions.latest() 改为StartupOptions.earliest() 就正常了。 啥时候空了再慢慢翻源码吧。。。
标签:java,集锦,flink,问题,streaming,FlinkCDC,apache,org,runtime 来源: https://www.cnblogs.com/30go/p/15811046.html
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