What does the error look like?

1. Using Cygwin and Hadoop 1.2.1 : Error like "Ignoring IOException setting persmission for path tmp/hadoop-237/mapred/staging/2371383496464/.staging": Failed to set permissions
    
2. ...LimitExceededException : To many counter groups : 51 max=50
    
3. Exception in thread "main" java.lang.NoClassDefFoundError...
4. Caused by java.lang.NoSuchFieldError...
5. Error on Spark RDD
   Caused by : com.esotericsoftware.kryo.KryoException : java.lang.NegativeArraySizeException
6. Eroor on JDBC Connection
   Error: java.io.IOException: unable to create connection at cascading.jdbc.db.DBConfiguration.getConnection(DBConfiguration.java:191)....
7. java.lang.UnsupportedClassVersionError : .... has been compiled by a more recent version of the Java Runtime (class file version 59.0).
   This version of the Java Runtime only recognizes class file verssion up to 52.0.
   It indicates a Java version mismatch. It occurs when a Java program is compiled with a newer JDK (Java Development Kit) but executed on an older JRE.
   See Installing JDK on Installation HGrid247-3.5