[jira] [Assigned] (BEAM-8884) Python MongoDBIO TypeError when splitting

["Yichi Zhang (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/BEAM-8884?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yichi Zhang reassigned BEAM-8884:
---------------------------------

    Assignee: Yichi Zhang

> Python MongoDBIO TypeError when splitting
> -----------------------------------------
>
>                 Key: BEAM-8884
>                 URL: https://issues.apache.org/jira/browse/BEAM-8884
>             Project: Beam
>          Issue Type: Bug
>          Components: sdk-py-core
>            Reporter: Brian Hulette
>            Assignee: Yichi Zhang
>            Priority: Major
>
> From [slack|https://the-asf.slack.com/archives/CBDNLQZM1/p1575350991134000]:
> I am trying to run a pipeline (defined with the Python SDK) on Dataflow that uses beam.io.ReadFromMongoDB. When dealing with very small datasets (<10mb) it runs fine, when trying to run it with slightly larger datasets (70mb), I always get this error:
> {code:}
> TypeError: '<' not supported between instances of 'dict' and 'ObjectId'
> {code}
> Stack trace see below. Running it on a local machine works just fine. I would highly appreciate any pointers what this could be.
> I hope this is the right channel do address this.
> {code:}
> 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 218, in execute
>     self._split_task)
>   File "/usr/local/lib/python3.7/site-packages/dataflow_worker/executor.py", line 226, in _perform_source_split_considering_api_limits
>     desired_bundle_size)
>   File "/usr/local/lib/python3.7/site-packages/dataflow_worker/executor.py", line 263, in _perform_source_split
>     for split in source.split(desired_bundle_size):
>   File "/usr/local/lib/python3.7/site-packages/apache_beam/io/mongodbio.py", line 174, in split
>     bundle_end = min(stop_position, split_key_id)
> TypeError: '<' not supported between instances of 'dict' and 'ObjectId'
> {code}



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