fix: reverting to but only in case of a multi cluster setup.

Author: cmeesters

snakemake_executor_plugin_slurm/__init__.py

@@ -820,10 +820,12 @@ def cancel_jobs(self, active_jobs: List[SubmittedJobInfo]):
                 # virtually no time.
                 scancel_command = f"scancel {jobids}"
 
-                # Add cluster specification if any clusters were found during submission
+                # adding the --clusters=all flag, if we submitted to more than one cluster
+                # issue #397 mentions that this flag is not available in older SLURM versions,
+                # but we assume that multicluster setups will usually run on a recent version
+                # of SLURM.
                 if self._submitted_job_clusters:
-                    clusters_str = ",".join(sorted(self._submitted_job_clusters))
-                    scancel_command += f" --clusters={clusters_str}"
+                    scancel_command += f" --clusters=all"
 
                 subprocess.check_output(
                     scancel_command,