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From Jay Vyas <jayunit...@gmail.com>
Subject Re: Debug Hadoop Junit Test in Eclipse
Date Mon, 16 Dec 2013 14:57:00 GMT
Excellent question.  its not trivial to debug a distributed app in eclipse,
but it is totally doable using javaagents .   We've written it up here:


FYI cc Brad childs (https://github.com/childsb) at red hat has helped me
with the tutorial, he might have some extra advice also (cc'd on this
email), I've written up one way to do this using the bigtop VMs here.

On Mon, Dec 16, 2013 at 8:07 AM, Karim Awara <karim.awara@kaust.edu.sa>wrote:

> Hi,
> I want to trace how a file upload (-put) happens in hadoop. So Im junit
> testing TestDFSShell.java. When I try to debug the test, It fails due to
> test timed out exception. I believe this is because I am trying to stop one
> thread while the rest are working. I have changed the breakpoint property
> to suspend VM, but still same problem.
> How can I trace calls made by datanode/namenode when running
> TestDFSShell.java Junit test through eclipse?
> I am using hadoop 2.2.0
> --
> Best Regards,
> Karim Ahmed Awara
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Jay Vyas

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