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  • Latest Post - ‏2013-07-24T08:07:48Z by Wei_Huang
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Pinned topic Reducer stacked when running wordcount program

‏2013-05-09T03:46:18Z |

To let students to have some hand-on experience of using hadoop, we want them to compile and run the wordcount example.

I have tested the codes last week and everything worked well at that time. However, it cannot be completed these days. At most of time, when the students (and I also test again) run the wordcount, the reducer stacks when the task is finished around 11% to 20%. And sometimes, it works well again.

I used IBM InfoSphere BigInsights Basic 1.4 64b - PAYG for all my nodes.

Can anyone help me with this issue?


And other problem just occured this afternoon. I find there are some files/directories under my hadoop file system and are not put by me. I am a little confused, because I think the virtual hadoop file systems of differenct users are isolated. Am I wrong?