thanks for your quickly reply. Yes,I am using Cloudera Manager and parcels I deployed 5 nodes. 2 of the 5 works fine. but the other 3 can't work(h00003 h00004 h00005). In the h00001, I use which command to find hadoop. it provide alternatives to the correct file. but in the h00003, it did't provide alternatives to the right file, just put the file in the /usr/bin. And I'am sure these files I had never created before or copied.
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