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transport/manager: Investigate connection closed for a nonexistent peer #237

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lexnv opened this issue Sep 5, 2024 · 0 comments
Open

transport/manager: Investigate connection closed for a nonexistent peer #237

lexnv opened this issue Sep 5, 2024 · 0 comments

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@lexnv
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lexnv commented Sep 5, 2024

Substrate panic triggered on debug_assert:

Thread 'tokio-runtime-worker' panicked at 'assertion failed: false', /usr/local/cargo/registry/src/index.crates.io-6f17d22bba15001f/litep2p-0.6.2/src/protocol/transport_service.rs:220

Code path:

litep2p/src/protocol/transport_service.rs

Lines 212 to 222 in a27d007

let Some(context) = self.connections.get_mut(&peer) else {
tracing::warn!(
target: LOG_TARGET,
?peer,
?connection_id,
"connection closed to a non-existent peer",
);
debug_assert!(false);
return None;
};

Substrate issue: paritytech/polkadot-sdk#5595
Grafana link: https://grafana.teleport.parity.io/goto/sR83XkeSg?orgId=1
@lexnv lexnv mentioned this issue Sep 24, 2024
Merged
lexnv added a commit that referenced this issue Oct 28, 2024
@lexnv @dmitry-markin
peer_state: Robust state machine transitions (#251)
f112b59 
This PR refactors the peer state. Previously the `AddressStore` and
`PeerState` where intertwined. The `AddressStore` contained an optional
`ConnectionID`, while the `PeerState` states contained a mandatory
score.

This PR separates the address store and the peer state, while moving the
logic of the peer state transitioning to a separate module. While at it,
have added documentation and testing for state machine transitions.

Changes include:
- Secondary connection from the PeerContext is merged into the
`PeerState`
- Connection Ids are removed from the Address Store
- Transport manager is refactored to use the new state machine, this
keeps a minimal code around in the manager

### Testing Done
- added extra tests to the peer state
- tested with subp2p-explorer for discovering kusama

This builds upon #250 for a
bigger refactor effort to track addresses in a healthier

Aims at improving:
- #239
- #238
- #237

---------

Signed-off-by: Alexandru Vasile <[email protected]>
Co-authored-by: Dmitry Markin <[email protected]>
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