[CHIA-4361] [Bug] start_full_node.exe crashes with exception 0xc0000409 in chia_rs.cp312-win_amd64.pyd (v2.7.3)
What happened?
My full node has crashed twice recently. I am running the node via CLI as a background service. The crash originates in start_full_node.exe and points to the chia_rs.cp312-win_amd64.pyd module with the exception code 0xc0000409 (STATUS_STACK_BUFFER_OVERRUN / Fast-Fail). I have never experienced this issue on older versions.
Event Viewer Log: Faulting application name: start_full_node.exe, version: 0.0.0.0, time stamp: 0x6a594678 Faulting module name: chia_rs.cp312-win_amd64.pyd, version: 0.0.0.0, time stamp: 0x6a441914 Exception code: 0xc0000409 Fault offset: 0x0000000000703697 Faulting process id: 0x224 Faulting application start time: 0x1DD2E86AEAFB142 Faulting application path: C:\Users\heget\AppData\Local\Programs\Chia\resources\app.asar.unpacked\daemon\start_full_node.exe Faulting module path: C:\Users\heget\AppData\Local\Programs\Chia\resources\app.asar.unpacked\daemon_internal\chia_rs\chia_rs.cp312-win_amd64.pyd Report Id: 56b4edaa-6cb8-4c3e-a23a-26b1bbba1e5a Faulting package full name: Faulting package-relative application ID:
Additional context The system has been running for almost 40 days without a restart. While this might be a factor (e.g., potential memory leak or resource exhaustion over time), I have previously run my node on older versions for over 60 days straight without any crashes. I am reporting this because the fast-fail exception in chia_rs suggests a potential unhandled panic in the Rust module during block validation or mempool processing.
Edit / Update: I have installed all remaining Windows updates and updated all hardware drivers to their latest versions. My hardware is completely stable and without any issues. However, the exact same crash still occurs. It crashed again after about 5 hours of uptime, and today once more after 3 hours.
Here is the latest debug.log leading up to the crash. As you can see, the chia_full_node process abruptly dies at 05:57:32.625 (the daemon drops the websocket connection to chia_full_node), leaving no error or traceback in the log. The farmer and wallet then continuously fail to reconnect to 127.0.0.1:8444.
Version
2.7.3
What platform are you using?
Windows
What ui mode are you using?
CLI
Relevant log output
2026-08-18T02:13:31.876 2.7.3 full_node chia.full_node.mempool_manager: INFO Size of mempool: 68 spends, cost: 95942514739 minimum fee rate (in FPC) to get in for 5M cost tx: 0
2026-08-18T02:13:31.882 2.7.3 full_node chia.full_node.mempool_manager: INFO new_peak() took 0.02 seconds
2026-08-18T02:13:31.882 2.7.3 full_node chia.full_node.full_node: INFO Finished signage point 12/64: CC: ecab398237fe067cfd73a42a8fbe0a6cb56527ce652923254b8da56e044e7c55 RC: 7b657ed546d3752723612c540a044323a3dd8a868d825e710ed2c34dfe129a82
2026-08-18T02:13:31.884 2.7.3 full_node chia.consensus.make_sub_epoch_summary: INFO make_sub_epoch_summary: height=9164194 < fork_height=4294967290, using None for challenge_root
2026-08-18T02:13:32.122 2.7.3 full_node chia.full_node.full_node: WARNING Block validation: 4.99s, pre_validation: 0.27s, CLVM: 0.27s, add-block: 4.61s, post-process: 0.11s, post-process2: 0.23s, cost: 10965245187, percent full: 99.684% header_hash: 54aac28d8a7930f0396b220b817b1cf8c77b0a92376838d528d12300610d1a90 height: 9164193
2026-08-18T02:13:32.280 2.7.3 wallet chia.wallet.wallet_state_manager: INFO set_sync_mode syncing - range: 9164192-9164193
2026-08-18T02:13:32.280 2.7.3 wallet chia.wallet.wallet_blockchain: INFO Peak set to: 9164193 timestamp: 1787011965
2026-08-18T02:13:32.847 2.7.3 harvester chia.harvester.harvester: INFO challenge_hash: 0b3c84ac4a ...42 plots were eligible for farming challengeFound 0 V1 proofs and 0 V2 qualities. Time: 0.82800 s. Total 14425 plots
2026-08-18T02:13:36.968 2.7.3 daemon chia.daemon.server : INFO Connection closed. Closing websocket with ['chia_full_node'].
2026-08-18T02:13:36.968 2.7.3 farmer farmer_server : INFO Connection closed: 127.0.0.1, node id: 51beba33b631f9d318fd41f0230a88caff212cb3b55146e3e55c410597a7fe28
2026-08-18T02:13:37.994 2.7.3 farmer chia.farmer.farmer : INFO peer disconnected PeerInfo(_ip=IPv4Address('127.0.0.1'), _port=8444)
2026-08-18T02:13:36.968 2.7.3 wallet wallet_server : INFO Connection closed: 127.0.0.1, node id: 51beba33b631f9d318fd41f0230a88caff212cb3b55146e3e55c410597a7fe28
2026-08-18T02:13:39.003 2.7.3 wallet chia.server.address_manager: INFO Loading peers from C:\Users\heget\.chia\mainnet\wallet\db\wallet_peers.dat
2026-08-18T02:13:40.026 2.7.3 farmer farmer_server : INFO Cannot connect to host 127.0.0.1:8444 ssl:<ssl.SSLContext object at 0x0000021118FA63D0> [Connection refused]
2026-08-19T05:57:27.580 2.7.3 full_node chia.full_node.full_node: INFO Updated peak to height 9169434...
2026-08-19T05:57:27.580 2.7.3 full_node chia.full_node.mempool_manager: INFO Size of mempool: 92 spends...
2026-08-19T05:57:27.580 2.7.3 full_node chia.consensus.make_sub_epoch_summary: INFO make_sub_epoch_summary: height=9169435 < fork_height=4294967290, using None for challenge_root
2026-08-19T05:57:32.625 2.7.3 daemon chia.daemon.server : INFO Connection closed. Closing websocket with ['chia_full_node'].
2026-08-19T05:57:32.625 2.7.3 farmer farmer_server : INFO Connection closed: 127.0.0.1, node id: 51beba33b631f9d318fd41f0230a88caff212cb3b55146e3e55c410597a7fe28
2026-08-19T05:57:33.649 2.7.3 farmer chia.farmer.farmer : INFO peer disconnected PeerInfo(_ip=IPv4Address('127.0.0.1'), _port=8444)
2026-08-19T05:57:32.625 2.7.3 wallet wallet_server : INFO Connection closed: 127.0.0.1, node id: 51beba33b631f9d318fd41f0230a88caff212cb3b55146e3e55c410597a7fe28
2026-08-19T05:57:36.691 2.7.3 wallet wallet_server : INFO Cannot connect to host 127.0.0.1:8444 ssl:<ssl.SSLContext object...> [Connection refused]
2026-08-19T05:57:37.597 2.7.3 farmer farmer_server : INFO Cannot connect to host 127.0.0.1:8444 ssl:<ssl.SSLContext object...> [Connection refused]
2026-08-19T05:57:39.279 2.7.3 wallet wallet_server : INFO Cannot connect to host 2408:8406:25a0:a788:10df:a951:864f:de5e:8444 ssl:<ssl.SSLContext object...> [Network is unreachable]Source: Chia-Network/chia-blockchain