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fix: sbatch stderr parsing #2 #165

Merged
merged 9 commits into from
Nov 7, 2024
Merged

fix: sbatch stderr parsing #2 #165

merged 9 commits into from
Nov 7, 2024

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cmeesters
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@cmeesters cmeesters commented Nov 5, 2024

next attempt to fix the behaviour described in #161

Summary by CodeRabbit

  • Bug Fixes

    • Improved error handling for SLURM job submissions, providing clearer indications of submission failures.
    • Enhanced error reporting with specific messages indicating sbatch command failures.
  • Chores

    • Minor adjustments to comments and formatting for better clarity.

cmeesters and others added 5 commits October 31, 2024 12:38
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coderabbitai bot commented Nov 5, 2024

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Review failed

The pull request is closed.

Walkthrough

The changes in this pull request focus on enhancing error handling in the snakemake_executor_plugin_slurm/__init__.py file during SLURM job submissions. The error-checking mechanism was refined to specifically look for the phrase "submission failed" in error outputs. Additionally, the run_job method now provides clearer feedback on job submission failures. Minor adjustments to comments and formatting were also made, but the overall control flow and method signatures remained unchanged.

Changes

File Path Change Summary
snakemake_executor_plugin_slurm/init.py Enhanced error handling in run_job method to check for specific error messages and improve feedback on job submission failures. Minor formatting and comment adjustments made.

Possibly related PRs

  • fix: logfile quoting and scancel error handling #140: The changes in this PR also modify the run_job method in the same file, enhancing error handling during job execution, which is closely related to the error handling improvements made in the main PR.
  • fix: sbatch stderr parsing #161: This PR enhances the error handling in the run_job method by improving how standard output and error are processed during SLURM job submission, aligning with the main PR's focus on refining error reporting mechanisms.

🐰 In the meadow, where bunnies play,
A job submission went astray.
With clearer errors, now we see,
What went wrong, oh joy and glee!
So hop along, let’s fix the flow,
With each detail, our knowledge will grow! 🌼


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@freekvh
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freekvh commented Nov 5, 2024

I'm happy to report that it works as expected!

@cmeesters cmeesters marked this pull request as ready for review November 6, 2024 08:54
@cmeesters cmeesters requested a review from fgvieira November 6, 2024 08:54
@cmeesters
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@fgvieira Hoi Filipe, time for another go? ;-)

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Actionable comments posted: 0

🧹 Outside diff range and nitpick comments (3)
snakemake_executor_plugin_slurm/__init__.py (3)

236-239: Consider making the error detection more robust.

While checking for "submission failed" is a good start, the error detection could be more comprehensive. Consider:

  1. Making the check case-insensitive
  2. Including other common SLURM error patterns
  3. Adding debug logging for stderr when it's non-empty but doesn't match the pattern
-        if "submission failed" in err:  # any other error message indicating failure?
+        # Check for various SLURM error patterns
+        if err:
+            self.logger.debug(f"SLURM stderr output: {err}")
+            error_patterns = [
+                "submission failed",
+                "SUBMISSION FAILED",
+                "error:",
+                "invalid"
+            ]
+            if any(pattern.lower() in err.lower() for pattern in error_patterns):
+                raise WorkflowError(
+                    f"SLURM job submission failed. The error message was {err}"
+                )

Line range hint 227-239: Consider enhancing the error handling architecture.

The current error handling structure could be improved for better maintainability and debugging:

  1. Consider extracting error handling into a dedicated method
  2. Add structured logging for error contexts
  3. Separate SLURM-specific from general subprocess errors

Example structure:

def _handle_submission_error(self, err: str, returncode: int = None) -> None:
    """Handle SLURM submission errors with structured logging."""
    self.logger.debug(f"SLURM submission error context: returncode={returncode}, stderr={err}")
    
    if returncode is not None:
        # Handle subprocess errors
        raise WorkflowError(
            f"SLURM job submission process failed with code {returncode}. Error: {err}"
        )
    
    # Handle SLURM-specific errors
    if self._is_slurm_submission_error(err):
        raise WorkflowError(f"SLURM job submission failed. Error: {err}")

def _is_slurm_submission_error(self, err: str) -> bool:
    """Check for SLURM-specific submission errors."""
    error_patterns = ["submission failed", "error:", "invalid"]
    return any(pattern.lower() in err.lower() for pattern in error_patterns)
🧰 Tools
🪛 Ruff

233-235: Within an except clause, raise exceptions with raise ... from err or raise ... from None to distinguish them from errors in exception handling

(B904)


Line range hint 241-245: Enhance job ID validation after submission.

The current job ID extraction could be more robust by adding format validation:

         slurm_jobid = out.strip().split(";")[0]
         if not slurm_jobid:
             raise WorkflowError("Failed to retrieve SLURM job ID from sbatch output.")
+        # Validate job ID format (typically numeric)
+        if not slurm_jobid.isdigit():
+            self.logger.warning(
+                f"Unexpected SLURM job ID format: {slurm_jobid}. "
+                "Please verify if this is correct for your SLURM configuration."
+            )
         slurm_logfile = slurm_logfile.replace("%j", slurm_jobid)
🧰 Tools
🪛 Ruff

233-235: Within an except clause, raise exceptions with raise ... from err or raise ... from None to distinguish them from errors in exception handling

(B904)

📜 Review details

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📥 Commits

Reviewing files that changed from the base of the PR and between 0368197 and fec0f3f.

📒 Files selected for processing (1)
  • snakemake_executor_plugin_slurm/__init__.py (1 hunks)

@fgvieira
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fgvieira commented Nov 6, 2024

Sure! :)

The two error messages are identical and that might make it a bit hard to figure out why it failed.
Could we make one of the messages more specific?

@cmeesters
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Hm, I am open to suggestions, because, yes: to a human reader it looks redundant. I assume, that you are referring to lines 232-238? The thing is: one is catching an error from lauchning the process itself. If it occurs, the likely cause is a cluster failure of some kind, where sbatch does not work. The 2nd is checking, whether some weird admins overwrote sbatch and give additional output to stderr, which ordinarily only happens upon error. I have no idea how to merge this conceptionally. Do you?

@fgvieira
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fgvieira commented Nov 6, 2024

I did not meant merge them, but maybe have slightly different error messages so it is easier to identify where the error comes from.

EDIT: made a suggestion

@cmeesters
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yeah, fine. Inserting a clarification and distinction is just good.

@cmeesters
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@fgvieira I truncated the error string again - otherwise the linter will fail. Breaking the string in a multiline string yielded ugly output. The current string is a compromise.

@fgvieira fgvieira enabled auto-merge (squash) November 7, 2024 07:14
@fgvieira fgvieira merged commit 348e537 into main Nov 7, 2024
4 of 5 checks passed
@fgvieira fgvieira deleted the fix/sbatch-stderr-parsing branch November 7, 2024 07:20
cmeesters pushed a commit that referenced this pull request Nov 7, 2024
🤖 I have created a release *beep* *boop*
---


##
[0.11.2](v0.11.1...v0.11.2)
(2024-11-07)


### Bug Fixes

* sbatch stderr parsing
([#161](#161))
([0368197](0368197))
* sbatch stderr parsing
[#2](#2)
([#165](#165))
([348e537](348e537))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
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3 participants