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Execute the command sudo useradd --help The error is reported as follows:fuyun is not in the sudoers file. This incident will be reported. Reason: the user does not have root permission temporarily Solution: modify sudoers file Switch to the root user, su -, run the visudo command, which is used ...

Error 1 when hive starts Cannot execute statement:impossible to write to binary long since BINLOG_FORMAT = STATEMENT... //Error when starting Caused by: javax.jdo.JDOException:Couldnt obtain a new sequence(unique id):Cannot execute statement:impossible to write to binary log since BINLOG_FORMAT = STATEMENT and at least one table uses a storage ...

The compression mode with lzo enabled is very useful for small-scale clusters. The compression ratio can be reduced to about 1 / 3 of the original log size. At the same time, the speed of decompression is faster. install Prepare jar package 1) Download lzo's jar project firsthttps://github.com/twitter/hadoop-lzo/archive/master.zip 2) the na ...

Assignment: Return the name of the student who scored the highest mark for each course. t_score_data.txt zhangsan math:90,english:60 lisi chinese:80,math:66,english:77 wangwu chinese:66,math:55,english:80 Return the names of the students for each course and for the highest score chinese ...

NestedThrowables: java.sql.SQLException: Unable to open a test connection to the given database. JDBC url = jdbc:mysql://hadoop:3306/metastore?createDatabaseIfNotExist=true, username = root. Terminating connection pool (set lazyInit to true if you expect to start your database after your app). Origin ...

Links to the original text: https://my.oschina.net/zipu888/blog/549644 Structs: Data within structs can be accessed through DOT (.). For example, the type of column c in the table is ...

premise Log in with the hive user and create a Hive database: mysql-uhive-phive under your own database mysql>create database hive character set utf8; mysql>flush privileges; mysql>show databases; install Start installing hive on hadoop1 tar -zxvf apache-hive-1.2.1-bin.tar.gz -C /usr ...

In hive, sometimes you need to customize some functions according to business requirements. Here are the steps to customize functions 1. Create a new maven project and introduce dependencies in the project's pom file <dependency> <groupId>org.apache.hive</groupId&g ...

Flume's main function is to read the data from the server's local disk in real time and write the data to HDFS. The Flume architecture is as follows: The internal principle of Flume Agent is shown in the figure.   1. Configure hive log file storage location: 2. Modify configuration items: ...

HiveQL Data Operation 1. Loading data into tables load data local inpath '/data/employees' overwrite into table employees partition (country='US',state='CA') If the partition directory does not exist, this command automatically creates the part ...