Issue with importing mongo collection to HDFS

I m new to mongo_hadoop connectors, I m facing the below issue while we try to import mongo collection from mongo DB to HDFS, it would be great if someone could help here?

attached the code.

Configuration: Configuration: core-default.xml, core-site.xml

log4j:WARN No appenders could be found for logger (org.apache.hadoop.metrics2.lib.MutableMetricsFactory).

log4j:WARN Please initialize the log4j system properly.

log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfigfor more info.

Exception in thread "main" java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected

at com.mongodb.hadoop.MongoInputFormat.getSplits(MongoInputFormat.java:49)

at org.apache.hadoop.mapreduce.JobSubmitter.writeNewSplits(JobSubmitter.java:498)

at org.apache.hadoop.mapreduce.JobSubmitter.writeSplits(JobSubmitter.java:515)

at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:399)

at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1295)

at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1292)

at java.security.AccessController.doPrivileged(Native Method)

at javax.security.auth.Subject.doAs(Subject.java:415)

at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1614)

at org.apache.hadoop.mapreduce.Job.submit(Job.java:1292)

at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1313)

at ImportCampaignSettingsMongo.main(ImportCampaignSettingsMongo.java:53)

ImportCampaignSettingsMongo.java