hadoop 集群环境Sqoop 将数据导入mysql问题 many connection errors; unblock with 'mysqladmin flush-hosts'
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hadoop 集群环境下面, 使用 sqoop 将hive 统计完生成的数据 导入 到 mysql 数据库中, 碰到 异常
Caused by: java.sql.SQLException: null, message from server: "Host 'datanode' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'"
这是 同一个ip在短时间内产生太多(超过mysql数据库max_connection_errors的最大值)中断的数据库连接而导致的阻塞;
解决 方法 使用管理员身份进入到mysql 输入以下命令: set global max_connect_errors = 1000;
java.io.IOException: com.mysql.jdbc.MysqlDataTruncation: Data truncation: Out of range value for column 'traffic' at row 1
该问题是数据库中 traffic 列 字段长度不够造成的, 修改该字段的长度即可解决问题。
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