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NullReference during discovery process when syncing #6995

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kamilchodola opened this issue May 8, 2024 · 1 comment · Fixed by #7070
Closed

NullReference during discovery process when syncing #6995

kamilchodola opened this issue May 8, 2024 · 1 comment · Fixed by #7070
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@benaadams

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@kamilchodola
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During a SnapSync I noticed this Exception appears on mainnet

Error during discovery process: System.NullReferenceException: Object reference not set to an instance of an object.
   at Nethermind.Network.Discovery.RoutingTable.NodeTable.ClosestNodesEnumerator.MoveNext() in /_/src/Nethermind/Nethermind.Network.Discovery/RoutingTable/NodeTable.cs:line 112
   at Nethermind.Network.Discovery.NodesLocator.LocateNodesAsync(Byte[] searchedNodeId, CancellationToken cancellationToken) in /_/src/Nethermind/Nethermind.Network.Discovery/NodesLocator.cs:line 81
   at Nethermind.Network.Discovery.DiscoveryApp.RunDiscoveryProcess() in /_/src/Nethermind/Nethermind.Network.Discovery/DiscoveryApp.cs:line 459

Seems like it does not affect sync but not sure how it would affect peers pool.
@kamilchodola
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@benaadams Any fix for that? Still happens on master

@benaadams benaadams mentioned this issue May 24, 2024
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Use tighter locking for Node list enumerator NethermindEth/nethermind
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@benaadams @kamilchodola