sorry for all the questions lately, but here's ano...
# ask-communityw
Will Milner
05/26/2020, 4:43 PMsorry for all the questions lately, but here's another one: When running a shell task in my flows I keep getting this error -
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May 26th 2020 at 12:39:41pm | prefect.CloudTaskRunner
ERROR lens
Failed to set task state with error: ClientError([{'message': "{'cached_inputs': defaultdict(<class 'dict'>, {'command': {'value': {'type': ['Unsupported value: ConstantResult']}}})}", 'locations': [{'line': 6, 'column': 13}], 'path': ['set_task_run_states', 'states', 0, 'id'], 'extensions': {'code': 'INTERNAL_SERVER_ERROR'}}])
Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/prefect/engine/cloud/task_runner.py", line 123, in call_runner_target_handlers
cache_for=self.task.cache_for,
File "/usr/local/lib/python3.7/site-packages/prefect/client/client.py", line 1104, in set_task_run_state
version=version,
File "/usr/local/lib/python3.7/site-packages/prefect/client/client.py", line 226, in graphql
raise ClientError(result["errors"])
prefect.utilities.exceptions.ClientError: [{'message': "{'cached_inputs': defaultdict(<class 'dict'>, {'command': {'value': {'type': ['Unsupported value: ConstantResult']}}})}", 'locations': [{'line': 6, 'column': 13}], 'path': ['set_task_run_states', 'states', 0, 'id'], 'extensions': {'code': 'INTERNAL_SERVER_ERROR'}}]z
Zachary Hughes
05/26/2020, 4:51 PMAbsolutely no reason to apologize for all the questions-- this is good stuff! Taking a look at your stack trace now.
Zachary Hughes
05/26/2020, 5:01 PMIs your shell task the only task that fails in this manner? Trying to narrow down the culprit.
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Will Milner
05/26/2020, 5:04 PMyes any Shell task fails, i have a previous non-shell task before this works fine
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Zachary Hughes
05/26/2020, 5:07 PMAre you using Cloud or Server as your orchestration layer?
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Will Milner
05/26/2020, 5:11 PMserver
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Zachary Hughes
05/26/2020, 5:13 PMGotcha. Do you know offhand what version of Server you're running? I'm wondering if this is due to running an older version of Server with a flow registered with a more recent version of Prefect Core.
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Will Milner
05/26/2020, 5:15 PMah this is definetly the case, i'm using server version 10.4, but the flow was made with 11.1
Will Milner
05/26/2020, 5:15 PMupdating now and trying
Will Milner
05/26/2020, 5:21 PMok i think that did it. There should be a better way to tell between flow and server version mis-matches. The server already knows what version each flow was registered under
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Zachary Hughes
05/26/2020, 5:23 PMThere’s definitely room for us to improve there— thank you for putting it on our radar.