EventHub 中同一条消息，不停的推送给消费端，查看日志发现错误:
Caused by: com.azure.messaging.eventhubs.implementation.PartitionProcessorException: Error in event processing callback at com.azure.messaging.eventhubs.PartitionPumpManager.processEvent(PartitionPumpManager.java:280) at com.azure.messaging.eventhubs.PartitionPumpManager.processEvents(PartitionPumpManager.java:314) ... 12 common frames omitted Caused by: org.springframework.jdbc.BadSqlGrammarException: ### Error querying database. Cause: org.postgresql.util.PSQLException: ERROR: column "messageeventcode" does not exist Hint: Perhaps you meant to reference the column "event_code". Position: 2209 ### The error may exist in file [D:\home\site\wwwroot\webapps\xxxxxx.xml] ### The error may involve defaultParameterMap ### The error occurred while setting parameters
问题分析
在客户端的日志中，发现消费端每一分钟都会与处理器（process event ）建立，而消费端连接后，都会通过Storage Account上存储的检查点(Checkpoint)来开始消费消息，而发现检查点一直都是同一个位置Starting event processing from offset[xxxx244317]，随后就出现了 Exception: Error in event processing callback 异常，导致消费端的这个进程关闭： Closing partition processor for partition 1 with close reason LOST_PARTITION_OWNERSHIP。
这个错误由接收事件时的错误或on_event中的错误引起，关闭了处理器连接，之后重新建立的连接还是从Starting event processing from offset[xxxx244317]开始的，所以导致一直消费相同的数据。只要解决了 PARTITION_PROCESSOR 事件中所引发异常的代码后，就可以解决此问题。
参考资料
Event Hub CheckPoint： https://docs.azure.cn/zh-cn/event-hubs/event-hubs-features#checkpointing