I am trying to execute a job and I am getting Heap Space Error. After make some tests, I realize (maybe) the problem is the custom key size. (the mapper out key/ reduce input key)
First I test: 1. Custom Key holding only one Long. This not cause heap space error problems. 2. Custom Key holding 3 Longs. This cause heap space problem. I really dont understand what is the real relantionship between heap size and the custom key size. Is there any relationship between them? Thanks,
