hadoop异常之Shuffle Error: Exceeded MAX_FAILED_UNIQUE_FETCHES; bailing-out.
2014-03-05 20:13
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最近集群扩充，发现新添加节点后，有两个异常
1、reduce变得很慢，速度显示为百M但进度不变
2、reduce偶尔失败，抛出Shuffle Error: Exceeded MAX_FAILED_UNIQUE_FETCHES; bailing-out.
异常分析，由于datanode没有修改hosts文件导致的，修改以后将新加机器添加到hosts，恢复正常
1、reduce变得很慢，速度显示为百M但进度不变
2、reduce偶尔失败，抛出Shuffle Error: Exceeded MAX_FAILED_UNIQUE_FETCHES; bailing-out.
异常分析，由于datanode没有修改hosts文件导致的，修改以后将新加机器添加到hosts，恢复正常
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