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  • ArrayWritable as key in Hadoop MapReduce
    via Stack Overflow by Khal Drogo
    • Initialization of all the collectors failed. Error in last collector was :class StringArrayWritable at org.apache.hadoop.mapred.MapTask.createSortingCollector( at org.apache.hadoop.mapred.MapTask.access$100( at org.apache.hadoop.mapred.MapTask$NewOutputCollector.<init>( at org.apache.hadoop.mapred.MapTask.runNewMapper( at at org.apache.hadoop.mapred.YarnChild$ at Method) at at at org.apache.hadoop.mapred.YarnChild.main( Caused by: java.lang.ClassCastException: class StringArrayWritable at java.lang.Class.asSubclass( at org.apache.hadoop.mapred.JobConf.getOutputKeyComparator( at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.init( at org.apache.hadoop.mapred.MapTask.createSortingCollector( ... 9 more

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