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Re: Debugging Gandiva failures in python CI tests


Thanks Wes, that worked.

When I run the gandiva tests (I did a step-through with pdb), I get this error :

> /home/ravindra/git/arrow/python/pyarrow/tests/test_gandiva.py(50)test_tree_exp_builder()
-> schema, [expr], pa.default_memory_pool())
(Pdb) 
LLVM ERROR: Program used external function '_ZNSt8ios_base4InitC1Ev' which could not be resolved!

I had hit the same issue with java/jni, and resolved it by doing a NativeLibrary.getInstance() (thanks to @pitrou). My knowledge of python is limited - can someone please help with the same for python ?

Thanks & regards,
ravindra. 

> On Dec 26, 2018, at 7:55 PM, Wes McKinney <wesmckinn@xxxxxxxxx> wrote:
> 
> hi Ravindra,
> 
> If you are using Anaconda, you need to use the conda instructions for
> environment setup instead of virtualenv. This should be called out
> more prominently in a warning in the docs
> 
> - Wes
> 
> On Tue, Dec 25, 2018 at 12:53 PM Ravindra Pindikura <ravindra@xxxxxxxxxx> wrote:
>> 
>> Hi,
>> 
>> My change (decimal support in gandiva) causes a CI failure in python test_gandiva.py
>> 
>> https://travis-ci.org/apache/arrow/jobs/471874254#L7167
>> 
>> However, the travis log has no further information on the failure.
>> 
>> To debug this, I tried setting up a python dev environment on ubuntu 14  using the steps in https://github.com/apache/arrow/blob/master/docs/source/python/development.rst
>> 
>> I got stuck at this (virtualenv pyarrow):
>> 
>> ValueError: failed to parse CPython sys.version: '3.6.7 |Anaconda, Inc.| (default, Oct 23 2018, 19:19:38) \n[GCC 7.3.0]'
>> 
>> 
>> Is this a known issue ? Any workaround ?
>> 
>> Thanks & regards,
>> Ravindra.
>> 
>>