'MapReduce Job Failed on MultiNode

I'm new to Hadoop. I have to use 'MapReduce' with WordCount. I am getting some errors. I am running a 50Gb 'MapReduce' job on a single server (8GB, 8 core). It ends successfully. I'm setting up multi nodes (each RAM 8GB CPU 8 Core), each with the same settings and same system specs as a single server. I am running 'MapReduce' job on same data stored in distributed structure. I'm getting an error. Can you help me find the error?

Error Log



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