减速器失败 [英] Reducers failing
问题描述
我们使用3个群集机器,并且mapreduce.tasktracker.reduce.tasks.maximum属性设置为9.当我设置了reducer的no等于或者小于9时job正在成功,但是如果我设置的大于9,那么它会失败,例外情况是Task attempt_201701270751_0001_r_000000_0 ping 60秒失败。杀死!。任何人都可以指导我会发生什么问题。
We are using 3 cluster machine and mapreduce.tasktracker.reduce.tasks.maximum property is set to 9. When I set no of reducer is equal to or less than 9 job is getting succeeded but if I set greater than 9 then it is failing with the exception "Task attempt_201701270751_0001_r_000000_0 failed to ping TT for 60 seconds. Killing!". Can any one guide me what will be the problem
推荐答案
https://问题.apache.org / jira / browse / MAPREDUCE-1905 (仅供参考)。
您可以尝试增加任务超时吗?
Can you please try to increase the task timeout ?
(mapreduce.task.timeout为更高值)( 0将禁用超时)
(mapreduce.task.timeout to a higher value ) ( 0 will disable the timeout )
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