How to access failure output if output is like this?

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How to access failure output if output is like this?

Shreyash Choudhary 126

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i want to log this message (above) , i have used activity.output thing in expression but its getting failed saying invalid template , i have used @if(activity('abcd').output.error.message,activity('abcd').output.error.message,activity('abcd').output)

can anyone help, i want to capture any kind of error via expression ,please provide expression.

also when i used activity('abcd').output , this text got inserted in Database ->

system.collections.generic.dictionary.~2[System.string.system.object]

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Answer 1

MartinJaffer-MSFT 26,161

@Shreyash Choudhary Hello and welcome to Microsoft Q&A.

As I understand you are having difficulty getting error message. You used activity('abcd').output.error.message

Error is not part of output. You need to use:

activity('abcd').error.message

I have made this mistake myself plenty of times. Output and Error (when present) both are complex objects. The properties have named keys, not positional keys, and this is why you got "system.collections.generic.dictionary". If you want to see the whole thing, I recommend converting to string first. This forces the whole object to resolve.

When troubleshooting I often use @{activity('abcd')}. Then I copy the result to a text editor and clean it up (the result gets escaped ("->\").

Shreyash Choudhary 126 Reputation points

2023-02-15T06:13:03.1066667+00:00

Hi MartinJaffer-MSFT,

are you sure about this @activity('abcd').error.message will always work?? will not give error like invalid template!!

and what is this @{activity('abcd')} -> i assume its just for debugging purpose no need to used in actual ,assuming @activity('abcd').error.message will work in all error cases right??
Shreyash Choudhary 126 Reputation points

2023-02-15T06:22:29.0033333+00:00

Hi @MartinJaffer-MSFT

Are you sure @activity('abcd').error.message will work in every case ?? this will not give invalid template like error??

i am assuming @{activity('abcd')} is just for debugging purpose ,need to use @activity('abcd').error.message only in expression !!

please correct me if i am wrong!

Thanks
MartinJaffer-MSFT 26,161 Reputation points

2023-02-15T21:01:52.8733333+00:00

@Shreyash Choudhary Yes the {activity('abcd')} is just for debugging.

Only when an activity fails, is activity('abcd').error valid. When activity succeeds 'activity('abcd').error will throw an error.

To get around this we use null-safe operator ?..

activity('abcd')?.error

similarly activity('abcd').output.value will throw an error when the activity fails, and again use the null-safe operator to get around this.

activity('abcd')?.output?.value
Shreyash Choudhary 126 Reputation points

2023-02-16T06:15:38.1233333+00:00

Hi MartinJaffer-MSFT

Thanks,

i am only using on activity('abcd').error.message when activity failure happened like logging via script by taking activity('abcd').error.message (only when fail happen on activity for success i have different ting almost same just success is logged) as input for error message to log in table, hope it will not fail in any case.

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How to access failure output if output is like this?

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