【问题描述】
使用Sqoop从Oracle抽数据到Hive表时，有时候会遇到以下报错；
Error: java.lang.RuntimeException: java.lang.RuntimeException: java.sql.SQLRecoverableException: IO Error: Connection reset at org.apache.sqoop.mapreduce.db.DBInputFormat.setDbConf(DBInputFormat.java:170) at org.apache.sqoop.mapreduce.db.DBInputFormat.setConf(DBInputFormat.java:161) at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:73) at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:749) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341) at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:422) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1714) at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158) Caused by: java.lang.RuntimeException: java.sql.SQLRecoverableException: IO Error: Connection reset at org.apache.sqoop.mapreduce.db.DBInputFormat.getConnection(DBInputFormat.java:223) at org.apache.sqoop.mapreduce.db.DBInputFormat.setDbConf(DBInputFormat.java:168) ... 10 more
【问题原因】
此问题一般是由于缺少一个生成快速随机数的工具；
【问题解决】 一般可以通过在JRE中的java.security中修改securerandom.source的值为以下内容；
cd $JAVA_HOME/jre/lib/security vi java.security securerandom.source=file:/dev/../dev/urandom
