報錯：Unable to read additional data from client sessionid 0x36ab52d38c20b20, likely client has clos...

報錯背景：

CDH集羣中，將kafka和Flume整合，將kafka的數據發送給Flume消費。

啓動kafka的時候正常，可是啓動Flume的時候出現了報錯現象。

可是我檢查了Flume，Flume的狀態很正常，因而我又查看了zookeeper的日誌（/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

報錯緣由：

緣由不明。

可是這個報錯確定和kafka報錯有關係。

網上的報錯解決辦法都是加長zookeeper對kafka的心跳檢測時間，可是這並不能解決問題。多是由於kafka的broker已經死掉了，因此心跳檢測會失敗。

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發的，只要把對應報錯組件的報錯解決，此報錯就會消失。（以上內容全爲我的推測）