open-nomad/.changelog/11565.txt

```release-note:bug
scheduler: Fix panic when system jobs are filtered by node class
```
scheduler: fix panic in system jobs when nodes filtered by class (#11565) In the system scheduler, if a subset of clients are filtered by class, we hit a code path where the `AllocMetric` has been copied, but the `Copy` method does not instantiate the various maps. This leads to an assignment to a nil map. This changeset ensures that the maps are non-nil before continuing. The `Copy` method relies on functions in the `helper` package that all return nil slices or maps when passed zero-length inputs. This changeset to fix the panic bug intentionally defers updating those functions because it'll have potential impact on memory usage. See https://github.com/hashicorp/nomad/issues/11564 for more details. 2021-11-24 17:28:47 +00:00			```release-note:bug
			`scheduler: Fix panic when system jobs are filtered by node class`
			```