消费者无限Rebalance

[Adam-Rollo]

目前出现了两次，突然间就不消费了。
打开kafka的server log：
[2020-05-30 00:00:00,004] INFO [GroupCoordinator 0]: Preparing to rebalance group UserCenterProd in state PreparingRebalance with old generation 45617525 (__consumer_offsets-25) (reason: Updating metadata for member Easyswoole-kafka-42496b59-1170-487b-8b2a-21d8d460d2e9) (kafka.coordinator.group.GroupCoordinator)
[2020-05-30 00:00:00,005] INFO [GroupCoordinator 0]: Stabilized group UserCenterProd generation 45617526 (__consumer_offsets-25) (kafka.coordinator.group.GroupCoordinator)
[2020-05-30 00:00:00,005] INFO [GroupCoordinator 0]: Assignment received from leader for group UserCenterProd for generation 45617526 (kafka.coordinator.group.GroupCoordinator)
[2020-05-30 00:00:00,012] INFO [GroupCoordinator 0]: Preparing to rebalance group UserCenterProd in state PreparingRebalance with old generation 45617526 (__consumer_offsets-25) (reason: Updating metadata for member Easyswoole-kafka-42496b59-1170-487b-8b2a-21d8d460d2e9) (kafka.coordinator.group.GroupCoordinator)
[2020-05-30 00:00:00,012] INFO [GroupCoordinator 0]: Stabilized group UserCenterProd generation 45617527 (__consumer_offsets-25) (kafka.coordinator.group.GroupCoordinator)
[2020-05-30 00:00:00,012] INFO [GroupCoordinator 0]: Assignment received from leader for group UserCenterProd for generation 45617527 (kafka.coordinator.group.GroupCoordinator)
[2020-05-30 00:00:00,019] INFO [GroupCoordinator 0]: Preparing to rebalance group UserCenterProd in state PreparingRebalance with old generation 45617527 (__consumer_offsets-25) (reason: Updating metadata for member Easyswoole-kafka-42496b59-1170-487b-8b2a-21d8d460d2e9) (kafka.coordinator.group.GroupCoordinator)
[2020-05-30 00:00:00,019] INFO [GroupCoordinator 0]: Stabilized group UserCenterProd generation 45617528 (__consumer_offsets-25) (kafka.coordinator.group.GroupCoordinator)
[2020-05-30 00:00:00,019] INFO [GroupCoordinator 0]: Assignment received from leader for group UserCenterProd for generation 45617528 (kafka.coordinator.group.GroupCoordinator)
[2020-05-30 00:00:00,025] INFO [GroupCoordinator 0]: Preparing to rebalance group UserCenterProd in state PreparingRebalance with old generation 45617528 (__consumer_offsets-25) (reason: Updating metadata for member Easyswoole-kafka-42496b59-1170-487b-8b2a-21d8d460d2e9) (kafka.coordinator.group.GroupCoordinator)
[2020-05-30 00:00:00,025] INFO [GroupCoordinator 0]: Stabilized group UserCenterProd generation 45617529 (__consumer_offsets-25) (kafka.coordinator.group.GroupCoordinator)
[2020-05-30 00:00:00,026] INFO [GroupCoordinator 0]: Assignment received from leader for group UserCenterProd for generation 45617529 (kafka.coordinator.group.GroupCoordinator)

里面这个UserCenterProd就是es启动的消费者组，其它客户端的消费者组都没有报问题。
后来我重新设置了这个消费者组的位移，服务才正常。

scala版本:2.12 kafka版本2.4