[bug]: forward_interceptor_restart Received unexpected error EOF

[yyforyongyu]

Have seen this couple times, one example from this build.

--- FAIL: TestLightningNetworkDaemon (264.33s)
    harness_setup.go:25: Setting up HarnessTest...
    harness_setup.go:38: Prepare the miner and mine blocks to activate segwit...
    harness_setup.go:46: Connecting the miner at 127.0.0.1:10033 with the chain backend...
    --- FAIL: TestLightningNetworkDaemon/tranche02/43-of-269/btcd/forward_interceptor_restart (29.41s)
        harness_node.go:403: Starting node (name=Alice) with PID=18049
        harness_node.go:403: Starting node (name=Bob) with PID=18109
        harness_node.go:403: Starting node (name=Carol) with PID=18129
        harness_node.go:403: Starting node (name=Dave) with PID=18171
        harness_node.go:403: Starting node (name=Bob) with PID=18581
        harness_node.go:403: Starting node (name=Alice) with PID=18611
        lnd_forward_interceptor_test.go:666: 
            	Error Trace:	/home/runner/work/lnd/lnd/itest/lnd_forward_interceptor_test.go:666
            	            				/home/runner/work/lnd/lnd/lntest/harness.go:297
            	            				/home/runner/work/lnd/lnd/itest/lnd_test.go:130
            	Error:      	Received unexpected error:
            	            	EOF
            	Test:       	TestLightningNetworkDaemon/tranche02/43-of-269/btcd/forward_interceptor_restart
            	Messages:   	failed to send request
        harness.go:375: finished test: forward_interceptor_restart, start height=562, end height=569, mined blocks=7
        harness.go:334: test failed, skipped cleanup
    lnd_test.go:138: Failure time: 2025-01-24 11:00:56.443
FAIL

[yyforyongyu]

Another related flake, from this build

--- FAIL: TestLightningNetworkDaemon/tranche03/133-of-267/bitcoind/forward_interceptor (126.84s)
        harness_node.go:403: Starting node (name=Alice) with PID=13427
        harness_node.go:403: Starting node (name=Bob) with PID=13479
        harness_node.go:403: Starting node (name=Carol) with PID=13501
        harness_node.go:403: Starting node (name=Alice) with PID=13648
        harness.go:375: finished test: forward_interceptor, start height=840, end height=847, mined blocks=7
        harness.go:426: unable to shutdown Carol, got err: [Carol]: assert shutdown failed in log[.logs-tranche3/85-forward_interceptor-Carol-0285026c.log]: node did not shut down properly: found log lines: RPC Server
            2025-02-18 14:12:09.616 [INF] RPCS rpcserver.go:1008: Stopping NeutrinoKitRPC Sub-RPC Server
            2025-02-18 14:12:09.616 [INF] RPCS rpcserver.go:1008: Stopping VersionRPC Sub-RPC Server
            2025-02-18 14:12:09.616 [INF] RPCS rpcserver.go:1008: Stopping WalletKitRPC Sub-RPC Server
            2025-02-18 14:12:09.616 [INF] RPCS rpcserver.go:1008: Stopping WatchtowerRPC Sub-RPC Server
            2025-02-18 14:12:09.616 [INF] RPCS rpcserver.go:1008: Stopping InvoicesRPC Sub-RPC Server
            2025-02-18 14:12:09.616 [INF] RPCS rpcserver.go:1008: Stopping RouterRPC Sub-RPC Server
            2025-02-18 14:12:09.616 [INF] RPCS rpcserver.go:1008: Stopping AutopilotRPC Sub-RPC Server
            2025-02-18 14:12:09.616 [INF] RPCS rpcserver.go:1008: Stopping ChainRPC Sub-RPC Server
            2025-02-18 14:12:09.616 [INF] RPCS rpcserver.go:1008: Stopping SignRPC Sub-RPC Server
            2025-02-18 14:12:09.616 [INF] RPCS rpcserver.go:1008: Stopping WatchtowerClientRPC Sub-RPC Server
            2025-02-18 14:12:09.616 [INF] LNWL estimator.go:877: Stopping web API fee estimator
        harness.go:429: 
            	Error Trace:	/home/runner/work/lnd/lnd/lntest/harness.go:429
            	            				/home/runner/work/lnd/lnd/lntest/harness.go:348
            	            				/opt/hostedtoolcache/go/1.23.6/x64/src/testing/testing.go:1176
            	            				/opt/hostedtoolcache/go/1.23.6/x64/src/testing/testing.go:1354
            	            				/opt/hostedtoolcache/go/1.23.6/x64/src/testing/testing.go:1684
            	Error:      	Received unexpected error:
            	            	[Carol]: assert shutdown failed in log[.logs-tranche3/85-forward_interceptor-Carol-0285026c.log]: node did not shut down properly: found log lines: RPC Server
            	            	2025-02-18 14:12:09.616 [INF] RPCS rpcserver.go:1008: Stopping NeutrinoKitRPC Sub-RPC Server
            	            	2025-02-18 14:12:09.616 [INF] RPCS rpcserver.go:1008: Stopping VersionRPC Sub-RPC Server
            	            	2025-02-18 14:12:09.616 [INF] RPCS rpcserver.go:1008: Stopping WalletKitRPC Sub-RPC Server
            	            	2025-02-18 14:12:09.616 [INF] RPCS rpcserver.go:1008: Stopping WatchtowerRPC Sub-RPC Server
            	            	2025-02-18 14:12:09.616 [INF] RPCS rpcserver.go:1008: Stopping InvoicesRPC Sub-RPC Server
            	            	2025-02-18 14:12:09.616 [INF] RPCS rpcserver.go:1008: Stopping RouterRPC Sub-RPC Server
            	            	2025-02-18 14:12:09.616 [INF] RPCS rpcserver.go:1008: Stopping AutopilotRPC Sub-RPC Server
            	            	2025-02-18 14:12:09.616 [INF] RPCS rpcserver.go:1008: Stopping ChainRPC Sub-RPC Server
            	            	2025-02-18 14:12:09.616 [INF] RPCS rpcserver.go:1008: Stopping SignRPC Sub-RPC Server
            	            	2025-02-18 14:12:09.616 [INF] RPCS rpcserver.go:1008: Stopping WatchtowerClientRPC Sub-RPC Server
            	            	2025-02-18 14:12:09.616 [INF] LNWL estimator.go:877: Stopping web API fee estimator
            	Test:       	TestLightningNetworkDaemon/tranche03/133-of-267/bitcoind/forward_interceptor
            	Messages:   	failed to shutdown all nodes
    lnd_test.go:138: Failure time: 2025-02-18 14:13:39.626