報錯：Unable to read additional data from client sessionid 0x36ab52d38c20b20, likely client has closed socket

報錯背景：

CDH集群中，將kafka和Flume整合，將kafka的數據發送給Flume消費。

啟動kafka的時候正常，但是啟動Flume的時候出現了報錯現象。

但是我檢查了Flume，Flume的狀態很正常，於是我又查看了zookeeper的日志（/var/log/zookeeper/），發現了報錯。

報錯現象：

2019-05-15 15:03:25,981 INFO org.apache.zookeeper.server.NIOServerCnxnFactory: Accepted socket connection from /192.168.52.26:36948
2019-05-15 15:03:25,982 INFO org.apache.zookeeper.server.ZooKeeperServer: Client attempting to establish new session at /192.168.52.26:36948
2019-05-15 15:03:25,984 INFO org.apache.zookeeper.server.ZooKeeperServer: Established session 0x36ab52d38c20b20 with negotiated timeout 30000 for client /192.168.52.26:36948
2019-05-15 15:03:26,042 WARN org.apache.zookeeper.server.NIOServerCnxn: caught end of stream exception
EndOfStreamException: Unable to read additional data from client sessionid 0x36ab52d38c20b20, likely client has closed socket
    at org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:231)
    at org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:208)
    at java.lang.Thread.run(Thread.java:748)
2019-05-15 15:03:26,043 INFO org.apache.zookeeper.server.NIOServerCnxn: Closed socket connection for client /192.168.52.26:36948 which had sessionid 0x36ab52d38c20b20
2019-05-15 15:04:11,075 INFO org.apache.zookeeper.server.NIOServerCnxnFactory: Accepted socket connection from /192.168.52.26:41510

報錯原因：

原因不明。

但是這個報錯肯定和kafka報錯有關系。

網上的報錯解決辦法都是加長zookeeper對kafka的心跳檢測時間，但是這並不能解決問題。可能是因為kafka的broker已經死掉了，所以心跳檢測會失敗。

報錯解決：

這個報錯其實不算是一個嚴重報錯，它是由zookeeper管理的其它組件報錯引起的，只要把對應報錯組件的報錯解決，此報錯就會消失。（以上內容全為個人推測）