topic Re: Executing a Linux command using a tSystem component in Talend Studio

Executing a Linux command using a tSystem component

Anonymous — Fri, 26 Apr 2019 10:09:21 GMT

Helllo,

I need to execute this linux command:

sudo su - hdfs -c "echo -n > /opt/application/bdfalh/test/log/hdfs-audit.log"

in tSystem, I used:

"sudo su - hdfs -c \"echo -n > "+context.rep_filesystem_log_hdfs+"hdfs-audit.log\""

I tried many different ways, single commen, array command, putting the command into a variable

nothing works so far.

At the execution, Talend returns no error but nothing happens on the server

Does anyone have any idea.

Thanks

Re: Executing a Linux command using a tSystem component

Anonymous — Fri, 26 Apr 2019 11:25:12 GMT

Hi,

Did you check whether the Linux user which Talend is using to execute the command (say talend) is having the authorization to perform sudo su to hdfs user?

Warm Regards,
Nikhil Thampi

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Re: Executing a Linux command using a tSystem component

vapukov — Fri, 26 Apr 2019 11:27:41 GMT

add to @nthampi question (just to check):

does context.rep_filesystem_log_hdfs ended with / ?

Re: Executing a Linux command using a tSystem component

Anonymous — Fri, 26 Apr 2019 13:24:17 GMT

Hi,

@nthampi : absolutly, that user has the right, I add it to sudoers file, plus when I launch the command throw linux terminal in the server, it does work.

@vapukov : yes, context.rep_filesystem_log_hdfs=/opt/hdp/log/hdfs/hdfs/

Did you check whether the Linux user which Talend is using to execute the command (say talend) is having the authorization to perform sudo su to hdfs user?

I wana add that I have two others tSystem (sudo cp and sudo mv), both work fine.

Regards

Re: Executing a Linux command using a tSystem component

vapukov — Fri, 26 Apr 2019 14:22:27 GMT

as 100% working variant - use .sh file instead of command

I remember we also meet with cases when tSystem do not work as expected and start use bash scripts instead, it often adds additional flexibility

Re: Executing a Linux command using a tSystem component

Anonymous — Fri, 26 Apr 2019 14:24:31 GMT

thanks that works