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https://issues.apache.org/jira/browse/BEAM-3956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16428710#comment-16428710
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Josh Burkart commented on BEAM-3956:
------------------------------------
Also, this used to work with the DirectRunner in 2.3.0, but no longer works in
2.4.0.
2.3.0 example output:
{noformat}
WARNING:root:A task failed with exception: 'unicode' object does not support
item assignment [while running 'ModifyTimestamps']
Traceback (most recent call last):
<...normal Python traceback...>
TypeError: 'unicode' object does not support item assignment [while running
'ModifyTimestamps']
{noformat}
2.4.0 example output:
{noformat}
TypeError: 'unicode' object does not support item assignment [while running
'ModifyTimestamps']
{noformat}
> Stacktraces from exceptions in user code should be preserved in the Python SDK
> ------------------------------------------------------------------------------
>
> Key: BEAM-3956
> URL: https://issues.apache.org/jira/browse/BEAM-3956
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core
> Reporter: Stephan Hoyer
> Priority: Major
> Time Spent: 6h 10m
> Remaining Estimate: 0h
>
> Currently, Beam's Python SDK loses stacktraces for exceptions. It does
> helpfully add a tag like "[while running StageA]" to exception error
> messages, but that doesn't include the stacktrace of Python functions being
> called.
> Including the full stacktraces would make a big difference for the ease of
> debugging Beam pipelines when things go wrong.
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