部署CDH5所遇问题

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本文档详细介绍了Cloudera Manager在启动Agent时遇到的错误及解决方法，包括清理安装错误、解决Hue连接MySQL的问题，以及在编辑组件配置时可能遇到的错误信息与解决策略。

1.启动agent报错

 - [17/Aug/2017 16:15:19 +0000] 4162 HTTPServer Thread-2 _cplogging  
   ERROR    [17/Aug/2017:16:15:19] ENGINE Error in HTTP server: shutting
   down Traceback (most recent call last):   File
   "/app/hadoop/cm-5.12.0/lib64/cmf/agent/build/env/lib/python2.6/site-packages/CherryPy-3.2.2-py2.6.egg/cherrypy/process/servers.py",
   line 187, in _start_http_thread self.httpserver.start()   File
   "/app/hadoop/cm-5.12.0/lib64/cmf/agent/build/env/lib/python2.6/site-packages/CherryPy-3.2.2-py2.6.egg/cherrypy/wsgiserver/wsgiserver2.py",
   line 1825, in start raise socket.error(msg) error: No socket could be
   created on ('bjxhm-hadoop-92', 9000) -- [Errno 99] Cannot assign
   requested address

以上问题解决办法：仔细检查 /etc/hosts中ip与主机映射名称是否有错误

2.安装错误进行清理操作

sudo service cloudera-scm-server stop
sudo service cloudera-scm-agent stop
sudo ps -ef |grep cloudera |grep -v ‘grep’|awk ‘{print $2" "$3}’|xargs -t -i sudo kill -9 {}
sudo umount cm_processes
sudo rm -rf ~/cm-5.12.0/lib/cloudera-scm-agent/*
sudo rm -rf /opt/cloudera/parcel-cache/
sudo service cloudera-scm-server start
sudo service cloudera-scm-agent start
tail -f /opt/cm-5.12.0/log/cloudera-scm-server/cloudera-scm-server.log
sudo ps -ef |grep cloudera |grep -v ‘grep’|awk ‘{print $2" "$3}’|xargs -t -i sudo kill -9 {}
sudo umount cm_processes
sudo rm -rf /opt/cm-5.12.0/lib/cloudera-scm-agent/*
sudo rm -rf /opt/cloudera/parcel-cache/

3.群集测试hue连接mysql出现error：Unable to verify database connection.

解决：

 copy：libmysqlclient.so.18.0.0
 做软连接：libmysqlclient.so.18 -> libmysqlclient.so.18.0.0	 
 ln –s libmysqlclient.so.18  libmysqlclient.so.18.0.0
 配置指向路径，ld.so.conf不是i

这里写图片描述

4.在用cloudera manager编辑各个组件配置的时候

有可能会出现报错信息：

 Error while committing the transaction

原因：

CM元数据库 字符集不兼容 字段 VALUE MESSAGE 无法写入对应的值。

解决办法：

  修改元数据库。use  cm_db;
  
  alter table CONFIGS modify `VALUE` longtext character set utf8 collate utf8_general_ci; alter table CONFIGS_AUD     modify `VALUE` longtext character set utf8 collate utf8_general_ci; alter table GLOBAL_SETTINGS modify `VALUE` longtext character set utf8 collate utf8_general_ci; alter table USER_SETTINGS   modify `VALUE` longtext character set utf8 collate utf8_general_ci; alter table AUDITS modify `MESSAGE` longtext character set utf8 collate utf8_general_ci; alter table REVISIONS modify `MESSAGE` longtext character set utf8 collate utf8_general_ci;