Fatkun's Blog

hive简单查询的过程

 Hive  897  2 分钟
查询以下语句的过程 select fr from xxxxxx where substr(fr, 1, 1) = 'a'; Hive查询在编译的阶段把语句转换成一个个有层……
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清理sendmail日志文件

 未分类  69  1 分钟
# 关闭sendmail service sendmail stop chkconfig --list sendmail chkconfig --level 2345 sendmail off # 删除mail文件夹 rm -rf /var/spool/mqueue && mkdir /var/spool/mqueue rm -rf /var/spool/clientmqueue &&……
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hadoop重启Namenode时，appTokens报FileNotFoundException

 Hadoop  1199  3 分钟
现象 报错如下 Application application_1405852606905_0014 failed 3 times due to AM Container for appattempt_1405852606905_0014_000003 exited with exitCode: -1000 due to: RemoteTrace: java.io.FileNotFoundException: File does not exist: hdfs://mycluster:8020/user/kpi/.staging/job_1405852606905_0014/appTokens at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:809) 同时注意到是因为每次……
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关闭linux sendmail

 Linux  13  1 分钟
service sendmail stop chkconfig --level 2345 sendmail off chkconfig --list sendmail via: http://hi.baidu.com/chenhj_brenda/item/e46c6b3fdb8f03b9124b14f0