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与这个问题类似,我的减速器没有运行。
不幸的是,他设置 MapOutput{key|Value} 的解决方案并没有解决我的问题。
对我有用的是改变我reduce()的接收Iterable<MyWritable>而不是Iterator<MyWritable>,如这篇文章所述。
reduce()
Iterable<MyWritable>
Iterator<MyWritable>