Collation fetching fairness

.gitlab/pipeline/zombienet/polkadot.yml

@@ -252,6 +252,17 @@ zombienet-polkadot-functional-0018-shared-core-idle-parachain:
       --local-dir="${LOCAL_DIR}/functional"
       --test="0018-shared-core-idle-parachain.zndsl"
 
+zombienet-polkadot-functional-0019-coretime-collation-fetching-fairness:
+  extends:
+    - .zombienet-polkadot-common
+  before_script:
+    - !reference [ .zombienet-polkadot-common, before_script ]
+    - cp --remove-destination ${LOCAL_DIR}/assign-core.js ${LOCAL_DIR}/functional
+  script:
+    - /home/nonroot/zombie-net/scripts/ci/run-test-local-env-manager.sh
+      --local-dir="${LOCAL_DIR}/functional"
+      --test="0019-coretime-collation-fetching-fairness.zndsl"
+
 zombienet-polkadot-smoke-0001-parachains-smoke-test:
   extends:
     - .zombienet-polkadot-common

polkadot/node/network/collator-protocol/src/error.rs

@@ -70,6 +70,9 @@ pub enum Error {
 
 	#[error("Response receiver for claim queue request cancelled")]
 	CancelledClaimQueue(oneshot::Canceled),
+
+	#[error("No state for the relay parent")]
+	RelayParentStateNotFound,
 }
 
 /// An error happened on the validator side of the protocol when attempting