有一天早上到公司用hive中查询数据,发现报错不能连接.通过检查发现mysql服务器没有启动,开启mysql服务器后查询正常.…

使用hive一段时间以后,今天在使用的时候突然报错,如下: hive> show databases;FAILED: Error in metadata: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.metastore.HiveMetaStoreClientFAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.…

数据库 没有开启  连接失败 org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet sent successfully to the server was 0 milliseco…

1 详细异常信息 ERROR yarn.ApplicationMaster: User class threw exception: java.sql.SQLException: Communications link failure The last packet successfully received from the server was 18,973 milliseconds ago. The last packet sent successfully to the server w…

当我们出现这种情况时 FAILED: SemanticException [Error 10096]: Dynamic partition strict mode requires at least one static partition column. To turn this off set hive.exec.dynamic.partition.mode=nonstrict 这时候我们需要改变一下设置 set hive.exec.dynamici.partition=true;set h…

Diagnostic Messages for this Task: java.lang.Throwable: Child Error         at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:271) Caused by: java.io.IOException: Task process exit with nonzero status of 1.         at org.apache.hadoop.mapre…

背景 使用sqoop从mysql导数据到hive,从本地服务器是可以访问mysql的(本地服务器是hadoop集群的一个datanode),但是sqoop导数据的时候依然连接不上mysql 报错如下: 从报错可以看出,是数据库连接失败,很常见的问题,但是从本地是可以直连mysql的. 因为sqoop导数据的时候,默认会启动4个map task,这4个map task会随机启动在不动的datanode上,所以在想,是不是因为其他节点没有权限访问mysql导致. 但是需要先搞清楚,sqoop在抽取数…

1. mysql中添加用户名时总出现如下问题:ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement 解决办法:flush privileges;  //新设置用户或更改密码后需要用该命令刷新mysql的系统权限相关表,否则会出现拒绝访问,还可以重启mysql服务器,是新设置生效. 2. grant all pri…

当在hive中show table 时如果报以下错时 FAILED: Error in metadata: javax.jdo.JDODataStoreException: Error(s) were found while auto-creating/validating the datastore for classes. The errors are printed in the log, and are attached to this exception. NestedThrowabl…

hive仓库位置由以下参数决定,默认位置/user/hive/warehouse: <property>         <name>hive.metastore.warehouse.dir</name>         <value>/user/hive/warehouse</value>     </property> hive中元数据配置: <property>         <name>javax.j…