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java.lang.ArrayIndexOutOfBoundsException: 0	at com.mapreduce.WordCount.run(WordCount.java:23)	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)	at com.mapreduce.WordCount.main(WordCount.java:18)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)