Thrown when an application tries to create an instance of a class using the newInstance method in class Class, but the specified class object cannot be instantiated because it is an interface or is an abstract class.
I get this exception for setting input reader to FileInputFormat
FileInputFormat is an abstract class !
job.setInputFormatClass(
Default is TextInputFormat and it can be used instead..
job.setInputFormatClass(TextInputFormat.class)
exception:
Exception in thread "main" java.lang.RuntimeException: java.lang.InstantiationException
at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:123)
at org.apache.hadoop.mapreduce.lib.input.MultipleInputs.getInputFormatMap(MultipleInputs.java:109)
at org.apache.hadoop.mapreduce.lib.input.DelegatingInputFormat.getSplits(DelegatingInputFormat.java:58)
at org.apache.hadoop.mapreduce.JobSubmitter.writeNewSplits(JobSubmitter.java:401)
at org.apache.hadoop.mapreduce.JobSubmitter.writeSplits(JobSubmitter.java:418)
at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:338)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:960)
at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:976)
at nyu.cs.webgraph.LinkGraphUrlIdReplacement.phase1(LinkGraphUrlIdReplacement.java:326)
at nyu.cs.webgraph.LinkGraphUrlIdReplacement.main(LinkGraphUrlIdReplacement.java:351)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at org.apache.hadoop.util.RunJar.main(RunJar.java:192)
Caused by: java.lang.InstantiationException
at sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:48)
at java.lang.reflect.Constructor.newInstance(Constructor.java:532)
at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:121)
... 14 more
