scheduler: fix panic in system jobs when nodes filtered by class #11565
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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 #11564 for more details.
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) 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 #11564 for more details.
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Fixes #11563
In the system scheduler, if a subset of clients are filtered by class,
we hit a code path where the
AllocMetrichas been copied, but theCopymethod does not instantiate the various maps. This leads to anassignment to a nil map. This changeset ensures that the maps are
non-nil before continuing.
The
Copymethod relies on functions in thehelperpackage that allreturn 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
#11564 for more details.
This impacts 1.2.0 and above, so there's no backport required.