[CONTROLLER-1930] Owner does not reset on the leader when the follower starts up Created: 26/Feb/20  Updated: 01/Jul/21  Resolved: 01/Jul/21

Status: Resolved
Project: controller
Component/s: eos
Affects Version/s: None
Fix Version/s: 4.0.0

Type: Bug Priority: Medium
Reporter: Tejas Nevrekar Assignee: Unassigned
Resolution: Duplicate Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified


 Description   

If due to any reason the entity ownership data for an entity is altered to have no candidates but an owner, the entity ownership does not recover from such a condition in spite of restarts. On startup, the follower requests the leader to remove itself from the candidate. But it did not change the owner. This fix now resets the owner so that later when the follower registers the entity, leader can elect a new owner and notify the follower, in turn initializing it.

Peculiarly observed from the following logs on the follower:

2020-02-11T14:19:01,974 | DEBUG | opendaylight-cluster-data-akka.actor.default-dispatcher-4 | AbstractClusterSingletonServiceProviderImpl | 363 - org.opendaylight.mdsal.singleton-dom-impl - 2.5.1 | - | Ownership change for ClusterSingletonService Provider DOMEntityOwnershipChange [entity=DOMEntity [type=org.opendaylight.mdsal.ServiceEntityType, id=/(urn:opendaylight:params:xml:ns:yang:mdsal:core:general-entity?revision=2015-09-30)entity/entity[\{(urn:opendaylight:params:xml:ns:yang:mdsal:core:general-entity?revision=2015-09-30)name=sdnfc-bgp-rib-6-service-group}]], state=LOCAL_OWNERSHIP_GRANTED [wasOwner=false, isOwner=true, hasOwner=true], inJeopardy=false]
2020-02-11T14:19:01,974 | DEBUG | opendaylight-cluster-data-akka.actor.default-dispatcher-4 | AbstractClusterSingletonServiceProviderImpl | 363 - org.opendaylight.mdsal.singleton-dom-impl - 2.5.1 | - | ClusterSingletonServiceGroup was not found for serviceIdentifier sdnfc-bgp-rib-6-service-group
2020-02-11T14:19:01,983 | DEBUG | opendaylight-cluster-data-akka.actor.default-dispatcher-4 | AbstractClusterSingletonServiceProviderImpl | 363 - org.opendaylight.mdsal.singleton-dom-impl - 2.5.1 | - | Ownership change for ClusterSingletonService Provider DOMEntityOwnershipChange [entity=DOMEntity [type=org.opendaylight.mdsal.AsyncServiceCloseEntityType, id=/(urn:opendaylight:params:xml:ns:yang:mdsal:core:general-entity?revision=2015-09-30)entity/entity[\{(urn:opendaylight:params:xml:ns:yang:mdsal:core:general-entity?revision=2015-09-30)name=sdnfc-bgp-rib-6-service-group}]], state=LOCAL_OWNERSHIP_GRANTED [wasOwner=false, isOwner=true, hasOwner=true], inJeopardy=false]
2020-02-11T14:19:01,983 | DEBUG | opendaylight-cluster-data-akka.actor.default-dispatcher-4 | AbstractClusterSingletonServiceProviderImpl | 363 - org.opendaylight.mdsal.singleton-dom-impl - 2.5.1 | - | ClusterSingletonServiceGroup was not found for serviceIdentifier sdnfc-bgp-rib-6-service-group
2020-02-11T14:19:25,988 | INFO | Blueprint Extender: 2 | BgpDeployerImpl | 251 - org.opendaylight.bgpcep.bgp-rib-impl - 0.10.1 | - | BGP Deployer global-bgp started.
2020-02-11T14:19:26,279 | INFO | opendaylight-cluster-data-notification-dispatcher-58 | BGPClusterSingletonService | 251 - org.opendaylight.bgpcep.bgp-rib-impl - 0.10.1 | - | BGPClusterSingletonService sdnfc-bgp-rib-6-service-group registered
2020-02-11T14:19:26,285 | DEBUG | opendaylight-cluster-data-notification-dispatcher-58 | ClusterSingletonServiceGroupImpl | 363 - org.opendaylight.mdsal.singleton-dom-impl - 2.5.1 | - | Instantiated new service group for sdnfc-bgp-rib-6-service-group
2020-02-11T14:19:26,285 | DEBUG | opendaylight-cluster-data-notification-dispatcher-58 | ClusterSingletonServiceGroupImpl | 363 - org.opendaylight.mdsal.singleton-dom-impl - 2.5.1 | - | Initializing service group sdnfc-bgp-rib-6-service-group with services []
2020-02-11T14:19:26,286 | DEBUG | opendaylight-cluster-data-notification-dispatcher-58 | ClusterSingletonServiceGroupImpl | 363 - org.opendaylight.mdsal.singleton-dom-impl - 2.5.1 | - | Adding service org.opendaylight.protocol.bgp.rib.impl.config.BGPClusterSingletonService@67fcb145 to service group sdnfc-bgp-rib-6-service-group
2020-02-11T14:19:26,286 | DEBUG | opendaylight-cluster-data-notification-dispatcher-58 | ClusterSingletonServiceGroupImpl | 363 - org.opendaylight.mdsal.singleton-dom-impl - 2.5.1 | - | Service group sdnfc-bgp-rib-6-service-group has no running services
2020-02-11T14:19:26,287 | DEBUG | opendaylight-cluster-data-notification-dispatcher-58 | ClusterSingletonServiceGroupImpl | 363 - org.opendaylight.mdsal.singleton-dom-impl - 2.5.1 | - | Service group sdnfc-bgp-rib-6-service-group is completely reconciled

 

 Comments   
Comment by Daniel De La Rosa [ 06/Apr/20 ]

tnevrekar and/or ajayslele can we consider this resolved? 

Comment by Robert Varga [ 01/Jul/21 ]

The implementation has been completely rewritten in CONTROLLER-1982.

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