使用Kafka客户端Java库，使用日志已经工作了一段时间但是出现以下错误它不再起作用：
2016-07-15 19:37:54.609 INFO 4342 --- [main] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-07-15 19:37:54.933 ERROR 4342 --- [main] o.a.k.c.c.internals.ConsumerCoordinator : Error UNKNOWN_MEMBER_ID occurred while committing offsets for group logstash
2016-07-15 19:37:54.933 WARN 4342 --- [main] o.a.k.c.c.internals.ConsumerCoordinator : Auto offset commit failed: Commit cannot be completed due to group rebalance
2016-07-15 19:37:54.941 ERROR 4342 --- [main] o.a.k.c.c.internals.ConsumerCoordinator : Error UNKNOWN_MEMBER_ID occurred while committing offsets for group logstash
2016-07-15 19:37:54.941 WARN 4342 --- [main] o.a.k.c.c.internals.ConsumerCoordinator : Auto offset commit failed:
2016-07-15 19:37:54.948 INFO 4342 --- [main] o.a.k.c.c.internals.AbstractCoordinator : Attempt to join group logstash failed due to unknown member id, resetting and retrying.
它一直在重置。
运行同一应用程序的另一个实例会立即收到错误。
我怀疑Kafka或它的ZooKeeper有问题，但没有错误日志。
谁知道这里发生了什么？
这是我正在使用的应用程序： https://github.com/izeye/log-redirector