[jira] [Commented] (BEAM-13721) ZeroDivisionError if source bundle smaller than 1mb

["Beam JIRA Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-13721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17512758#comment-17512758 ] 

Beam JIRA Bot commented on BEAM-13721:
--------------------------------------

This issue is P2 but has been unassigned without any comment for 60 days so it has been labeled "stale-P2". If this issue is still affecting you, we care! Please comment and remove the label. Otherwise, in 14 days the issue will be moved to P3.

Please see https://beam.apache.org/contribute/jira-priorities/ for a detailed explanation of what these priorities mean.


> ZeroDivisionError if source bundle smaller than 1mb
> ---------------------------------------------------
>
>                 Key: BEAM-13721
>                 URL: https://issues.apache.org/jira/browse/BEAM-13721
>             Project: Beam
>          Issue Type: Bug
>          Components: io-py-gcp
>    Affects Versions: 2.24.0
>            Reporter: Inbar Dekel
>            Priority: P2
>              Labels: stale-P2
>
> Hi,
> I built a (GCP) DataFlow + apache-beam (version 2.24.0) pipeline, using python.
> The pipeline's stages are:
> 1. reading from BigQuery
> 2. running a custom function (using the ParDo while passing it a class inheriting 'beam.DoFn'), that transforms the read data.
> 3. writing the transformed data to BigQuery
>  
> The pipeline works fine when stage 1 is querying a small amount of data, but when it is querying data from the last six months (lots of data), I am getting this error:
>  
> {code:python}
> apache_beam.runners.dataflow.dataflow_runner.DataflowRuntimeException: Dataflow pipeline failed. State: FAILED, Error:
> Traceback (most recent call last):
>   File "/usr/local/lib/python3.7/site-packages/dataflow_worker/batchworker.py", line 649, in do_work
>     work_executor.execute()
>   File "/usr/local/lib/python3.7/site-packages/dataflow_worker/executor.py", line 179, in execute
>     op.start()
>   File "dataflow_worker/native_operations.py", line 38, in dataflow_worker.native_operations.NativeReadOperation.start
>   File "dataflow_worker/native_operations.py", line 39, in dataflow_worker.native_operations.NativeReadOperation.start
>   File "dataflow_worker/native_operations.py", line 44, in dataflow_worker.native_operations.NativeReadOperation.start
>   File "dataflow_worker/native_operations.py", line 48, in dataflow_worker.native_operations.NativeReadOperation.start
>   File "/usr/local/lib/python3.7/site-packages/dataflow_worker/workercustomsources.py", line 69, in _{_}iter{_}_
>     self._source.start_position, self._source.stop_position)
>   File "/usr/local/lib/python3.7/site-packages/apache_beam/io/concat_source.py", line 78, in get_range_tracker
>     start_position, stop_position, self._source_bundles)
>   File "/usr/local/lib/python3.7/site-packages/apache_beam/io/concat_source.py", line 131, in _{_}init{_}_
>     self._compute_cumulative_weights(source_bundles[start[0]:last]) + [1] *
>   File "/usr/local/lib/python3.7/site-packages/apache_beam/io/concat_source.py", line 154, in _compute_cumulative_weights
>     running_total.append(max(min_diff, min(1, running_total[-1] + w / total)))
> ZeroDivisionError: float division by zero
> {code}
>  
> I saw this issue in your repository:
>  
> https://issues.apache.org/jira/browse/BEAM-10004
>  
> which is referencing the same problem I have, but even though this fix is already implemented in my version of apache-beam (2.24.0), I still get this error.
>  
> Can you please guide me in fixing this issue?
> Is it something I am doing wrong or is this your bug?
>  
> Thank you in advance and have a good one!
>  
> Inbar Dekel



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