程序员大魔王

在hive中创建表时报错hive (default)> create table student(id int);FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. MetaException(message:For direct MetaStore DB connecti...

在刷算法提的时候遇到一个问题，判断二维数组为空的这行代码，出现了数组下标越界的报错//错误代码if(matrix == null || matrix[0].length == 0 || matrix.length == 0){ return false;}正确代码应该如下if(matrix == null || matrix.length == 0 || matrix[0]....

问题描述在Eclipse中用插件（而不是手动打包上传服务器方式）运行WordCount程序的过程中出现了如下错误：DEBUG - LocalFetcher 1 going to fetch: attempt_local938878567_0001_m_000000_0 WARN - job_local938878567_0001java.lang.Exception: org.apache...