com.mysql.jdbc.exceptions.jdbc4.CommunicationsException

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    • com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. at org.apache.sqoop.mapreduce.db.DBInputFormat.setConf(DBInputFormat.java:167) at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:62) at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:730) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:375) at org.apache.hadoop.mapred.Child$4.run(Child.java:255) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:396) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1132) at org.apache.hadoop.mapred.Child.main(Child.java:249)
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