Hi all, Recently, i have met a problem, and i can not solve it after some efforts. So I wanna look for help here, and any help will be appreciated. Thanks!
My case is depicted as below: I want to execute the HiveQL command : select transform(a.col) using '/home/pc/mypython.py' as (col string) from tmp_table a where a.col2='01'; where the 'mypython.py' is a python script of mine. I have built a environment of hadoop within the vmware machine on my single node PC-home, and the command works well on this environment within only single node. I also have a cluster of three PC servers, including node A, B, and C. Then, I store the '/home/pc/mypython.py' on node A. However, every time I issue the command to the cluster, i am always going to get the error information like this: ------------------------------------------------------------------------------------------------------------------- Caused by: java.io.IOException: Cannot run program "/home/pc/mypython.py": java.io.IOException: error=2, No such file or directory at java.lang.ProcessBuilder.start(ProcessBuilder.java:460) at org.apache.hadoop.hive.ql.exec.ScriptOperator.processOp(ScriptOperator.java:279) ... 20 more Caused by: java.io.IOException: java.io.IOException: error=2, No such file or directory at java.lang.UNIXProcess.(UNIXProcess.java:148) at java.lang.ProcessImpl.start(ProcessImpl.java:65) at java.lang.ProcessBuilder.start(ProcessBuilder.java:453) ... 21 more ------------------------------------------------------------------------------------------------------------------- By looking up the Job logs, these errors were reported by node B and node C. It seems that the tasktracker B and C can not find the script. On hive wiki, I didn't find any instruction on how to place the user script. What should I do to place my script in proper place? Thanks in advance for any reply! 2011-03-01 Jianhua Wang