zookeeper意外异常导致sock仍然打开时关闭答案

【问题标题】：zookeeper unexpected exception causing shutdown while sock still openzookeeper意外异常导致sock仍然打开时关闭
【发布时间】：2016-04-14 11:27:27
【问题描述】：

我在 Cloudera Hadoop 2.0 集群中遇到了很多重大问题，这些问题与 Zookeeper 上每天发生多次的以下错误相吻合。

我无法找到问题的根本原因。

感谢任何帮助。

2016-04-11 14:48:30,872 ERROR org.apache.zookeeper.server.quorum.LearnerHandler: Unexpected exception causing shutdown while sock still open 2016-04-11 14:48:49,584 ERROR org.apache.zookeeper.server.quorum.LearnerHandler: Unexpected exception causing shutdown while sock still open 2016-04-11 14:49:07,239 ERROR org.apache.zookeeper.server.quorum.LearnerHandler: Unexpected exception causing shutdown while sock still open 2016-04-11 14:49:25,291 ERROR org.apache.zookeeper.server.quorum.LearnerHandler: Unexpected exception causing shutdown while sock still open 2016-04-11 14:49:42,779 ERROR org.apache.zookeeper.server.quorum.LearnerHandler: Unexpected exception causing shutdown while sock still open 2016-04-11 14:50:00,613 ERROR org.apache.zookeeper.server.quorum.LearnerHandler: Unexpected exception causing shutdown while sock still open 2016-04-11 14:50:17,976 ERROR org.apache.zookeeper.server.quorum.LearnerHandler: Unexpected exception causing shutdown while sock still open 2016-04-11 14:50:35,957 ERROR org.apache.zookeeper.server.quorum.LearnerHandler: Unexpected exception causing shutdown while sock still open 2016-04-11 14:50:54,676 ERROR org.apache.zookeeper.server.quorum.LearnerHandler: Unexpected exception causing shutdown while sock still open

【问题讨论】：

检查一下我希望它可以解决您的问题...community.cloudera.com/t5/Storage-Random-Access-HDFS/…
谢谢你，克里希纳，我会尽快尝试。

标签： hadoop apache-zookeeper hadoop-yarn cloudera

【解决方案1】：

原来是 2 层问题：

在leader选举时间过长时发生上述错误。

leader 选举耗时过长的原因是 3 个 zookeeper 服务器之一上的数据损坏。

一旦 /var/lib/zookeeper 中的数据文件被炸毁，zookeeper 重新启动，leader 选举成功，进而停止了上述问题。

【讨论】：