RUM-1000 chore: improve telemetry messages for file I/O errors

[ganeshnj]

What and why?

Current telemetry message is not very helpful to diagnose file IO related issues

For example

Failed to write data to file - Cannot create file at path: /var/mobile/Containers/Data/Application/*/Library/Caches

How?

Split the big do-try-catch block into individual ones to get more insights where the issue.

Review checklist

• Feature or bugfix MUST have appropriate tests (unit, integration)
• Make sure each commit and the PR mention the Issue number or JIRA reference
• Add CHANGELOG entry for user facing changes

Custom CI job configuration (optional)

• Run unit tests for Session Replay
• Run smoke tests
• Run tests for tools/

[ncreated]

suggestion/ For more context, would it make sense to include writeSize? To control the cardinality of error.message, this could be done by composing the error:

enum FileWriterError: Error { /* ... */ }

FileWriterError.writeError(error: error, writeSize: writeSize)

[ganeshnj]

this would mask the underlying error and wrapping one error inside another is something not very encouraged. However I do like the idea of using the writeSize in the error message. Given these are logs, cardinality must not be an issue.

[ncreated]

I like the direction - definitely better than what we have today. However, to me the most critical piece that is missing is the actual track we write to (rum, trace, logs, sr, sr-resources). Given that we have trackName available in parent FilesOrchestrator, could we make it into FileWriter and attach to the error?

[ganeshnj]

I like the direction - definitely better than what we have today. However, to me the most critical piece that is missing is the actual track we write to (rum, trace, logs, sr, sr-resources). Given that we have trackName available in parent FilesOrchestrator, could we make it into FileWriter and attach to the error?

fair call, I just updated error messages with track name following the same format as we do at other places ({trackname})

[ncreated]

Great! 🎯