[CHIA-4368] [Bug] syncing issue: peers with peak & no peers with header hash
Author: OverActiveBladderSystemCreated Aug 20, 2026Updated Sep 16, 2026
Labelsbug
What happened?
Starting up a node that has not been sync'd in days only to experience a back and forth between "peers with peak" and "no peers with header hash" retrying several times resulting in the node struggling to sync.
With 2 of 5 (to 6) peers on peak, each fail would cause the node to change the header hash it was trying to sync with (as if it were stuck in a loop and unable to finish in time with the last batch of data it tried syncing to).
Eventually the node is able to get 1 of the 2 peak peers to feed the node data after numerous fails, which seems to then allow both of those peak peers to feed the node data.
Windows 11 Chia 2.7.3 GUI
Version
2.7.3
What platform are you using?
Windows
What ui mode are you using?
GUI
Relevant log output
2026-08-20T12:34:46.715 2.7.3 full_node chia.full_node.full_node: INFO Starting to perform sync.
2026-08-20T12:34:46.716 2.7.3 full_node chia.full_node.full_node: INFO Waiting to receive peaks from peers. (timeout: 30.0s)
2026-08-20T12:34:46.716 2.7.3 full_node chia.full_node.full_node: INFO Collected a total of 5 peaks.
2026-08-20T12:34:46.717 2.7.3 full_node chia.full_node.full_node: INFO Selected peak Peak(header_hash=<bytes32: 20c7e4e297509b1dd60068ce665d91e8bec414477abb1ff2570987db3da64c10>, height=9176650, weight=55917909776)
2026-08-20T12:34:46.948 2.7.3 full_node chia.full_node.full_node: INFO Total of 2 peers with peak 9176650
2026-08-20T12:34:46.949 2.7.3 full_node chia.full_node.full_node: INFO Requesting weight proof from peer 80.120.94.65 up to height 9176650
2026-08-20T12:34:48.521 2.7.3 full_node full_node_server : INFO Cannot connect to host 240e:398:2ac3:611:851:2a5e:dfec:214b:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The network location cannot be reached. For information about network troubleshooting, see Windows Help]
2026-08-20T12:34:50.757 2.7.3 full_node full_node_server : INFO Cannot connect to host 46.153.182.56:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The semaphore timeout period has expired]
2026-08-20T12:34:54.290 2.7.3 full_node chia.full_node.weight_proof: INFO validating 23897 sub epochs
2026-08-20T12:34:54.323 2.7.3 full_node chia.full_node.full_node: INFO Ignoring new_compact_vdf, height 9176390 too recent.
2026-08-20T12:34:54.324 2.7.3 full_node chia.full_node.weight_proof: INFO validate weight proof peak height 9176650
2026-08-20T12:34:58.277 2.7.3 full_node full_node_server : INFO Cannot connect to host 175.0.64.95:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The semaphore timeout period has expired]
2026-08-20T12:35:02.049 2.7.3 full_node full_node_server : INFO Cannot connect to host 188.143.103.175:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The semaphore timeout period has expired]
2026-08-20T12:35:02.641 2.7.3 full_node chia.full_node.full_node: INFO Ignoring new_compact_vdf, height 9176396 too recent.
2026-08-20T12:35:02.642 2.7.3 full_node chia.full_node.full_node: INFO Ignoring new_compact_vdf, height 9176393 too recent.
2026-08-20T12:35:07.363 2.7.3 full_node full_node_server : INFO Cannot connect to host 2600:4040:7fb0:1a00:f81a:3856:6680:8937:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The network location cannot be reached. For information about network troubleshooting, see Windows Help]
2026-08-20T12:35:09.933 2.7.3 harvester chia.harvester.harvester: INFO _plot_refresh_callback: event started, loaded 0, removed 0, processed 0, remaining 1, duration: 0.00 seconds, total plots: 1
2026-08-20T12:35:09.934 2.7.3 harvester chia.harvester.harvester: INFO _plot_refresh_callback: event done, loaded 0, removed 0, processed 1, remaining 0, duration: 0.00 seconds, total plots: 1
2026-08-20T12:35:10.442 2.7.3 full_node chia.full_node.full_node: INFO Ignoring new_compact_vdf, height 9176392 too recent.
2026-08-20T12:35:12.247 2.7.3 full_node chia.full_node.full_node: INFO Ignoring new_compact_vdf, height 9176395 too recent.
2026-08-20T12:35:12.570 2.7.3 full_node chia.full_node.full_node: INFO Ignoring new_compact_vdf, height 9176394 too recent.
2026-08-20T12:35:12.590 2.7.3 full_node chia.full_node.full_node: INFO Ignoring new_compact_vdf, height 9176391 too recent.
2026-08-20T12:35:13.306 2.7.3 full_node full_node_server : INFO Cannot connect to host 188.25.174.250:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The semaphore timeout period has expired]
2026-08-20T12:35:14.879 2.7.3 full_node full_node_server : INFO Cannot connect to host 2607:fb90:b200:15e:3ee2:4070:74a3:c22a:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The network location cannot be reached. For information about network troubleshooting, see Windows Help]
2026-08-20T12:35:15.668 2.7.3 full_node chia.full_node.full_node: INFO Re-checked peers: total of 2 peers with peak 9176650
2026-08-20T12:35:15.725 2.7.3 full_node chia.full_node.full_node: WARNING Not syncing, no peers with header_hash 20c7e4e297509b1dd60068ce665d91e8bec414477abb1ff2570987db3da64c10
2026-08-20T12:35:15.726 2.7.3 full_node chia.full_node.full_node: INFO Start syncing from fork point at 9175300 up to 9176650
2026-08-20T12:35:15.730 2.7.3 full_node chia.full_node.full_node: WARNING Not syncing, no peers with header_hash 20c7e4e297509b1dd60068ce665d91e8bec414477abb1ff2570987db3da64c10
2026-08-20T12:35:15.730 2.7.3 full_node chia.full_node.full_node: INFO peers with peak: 0
2026-08-20T12:35:15.730 2.7.3 full_node chia.full_node.full_node: ERROR failed fetching 9175300 to 9175331 from peers
2026-08-20T12:35:15.731 2.7.3 full_node chia.full_node.full_node: INFO long sync done
2026-08-20T12:35:15.731 2.7.3 full_node chia.full_node.full_node: INFO Updated peak to height 9176124, weight 55916630544, hh 8a32c7a6e7fee20ab13deb1799a535ff4114e6d13eeb9607224711ad27ca9ccb, ph 570aa9095714989264e23248337f2276e2d6ed1a35b35d7ca27132d2cd7aedd8, forked at 9175300, rh: cc59a0554fae8b7a1f9a9e164757bfabe2df9e2fba07fe6112d7a92fadb4013e, total iters: 104894457137778, overflow: False, deficit: 6, difficulty: 2432, sub slot iters: 574619648, Generator size: 4442, Generator ref list size: 0
2026-08-20T12:35:15.732 2.7.3 full_node chia.consensus.make_sub_epoch_summary: INFO make_sub_epoch_summary: height=9176125 < fork_height=4294967290, using None for challenge_root
2026-08-20T12:35:17.093 2.7.3 full_node full_node_server : INFO Cannot connect to host 194.180.188.136:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The semaphore timeout period has expired]
2026-08-20T12:35:19.784 2.7.3 full_node chia.full_node.full_node: INFO Starting to perform sync.
2026-08-20T12:35:19.786 2.7.3 full_node chia.full_node.full_node: INFO Waiting to receive peaks from peers. (timeout: 30.0s)
2026-08-20T12:35:19.787 2.7.3 full_node chia.full_node.full_node: INFO Collected a total of 5 peaks.
2026-08-20T12:35:19.788 2.7.3 full_node chia.full_node.full_node: INFO Selected peak Peak(header_hash=<bytes32: 4bbd1227b3a9b43bb7bd0dd7ae49ca7e9a0e0aafc2fae3e7b6deb3d1aa783fbb>, height=9176652, weight=55917914640)
2026-08-20T12:35:20.154 2.7.3 full_node chia.full_node.full_node: INFO Total of 2 peers with peak 9176652
2026-08-20T12:35:20.154 2.7.3 full_node chia.full_node.full_node: INFO Requesting weight proof from peer 194.230.189.217 up to height 9176652
2026-08-20T12:35:20.457 2.7.3 full_node chia.full_node.full_node: INFO Ignoring new_compact_vdf, height 9176393 too recent.
2026-08-20T12:35:20.850 2.7.3 full_node full_node_server : INFO Cannot connect to host 117.39.46.142:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The semaphore timeout period has expired]
2026-08-20T12:35:24.639 2.7.3 full_node full_node_server : INFO Cannot connect to host 79.116.156.127:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The semaphore timeout period has expired]
2026-08-20T12:35:26.113 2.7.3 full_node full_node_server : INFO Cannot connect to host 2408:832f:208c:8000:c05d:ea63:8fdd:29cc:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The network location cannot be reached. For information about network troubleshooting, see Windows Help]
2026-08-20T12:35:29.191 2.7.3 full_node chia.full_node.weight_proof: INFO validating 23897 sub epochs
2026-08-20T12:35:29.223 2.7.3 full_node chia.full_node.weight_proof: INFO validate weight proof peak height 9176652
2026-08-20T12:35:29.312 2.7.3 full_node chia.full_node.full_node: INFO Ignoring new_compact_vdf, height 9176392 too recent.
2026-08-20T12:35:29.313 2.7.3 full_node chia.full_node.full_node: INFO Ignoring new_compact_vdf, height 9176390 too recent.
2026-08-20T12:35:29.885 2.7.3 full_node full_node_server : INFO Cannot connect to host 2601:586:c804:85a0:b926:8289:2a7a:291e:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The network location cannot be reached. For information about network troubleshooting, see Windows Help]
2026-08-20T12:35:32.153 2.7.3 full_node full_node_server : INFO Cannot connect to host 125.24.171.72:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The semaphore timeout period has expired]
2026-08-20T12:35:37.405 2.7.3 full_node full_node_server : INFO Cannot connect to host 2603:8080:1f03:e4:f9a2:5b58:7e9f:dc7c:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The network location cannot be reached. For information about network troubleshooting, see Windows Help]
2026-08-20T12:35:39.648 2.7.3 full_node full_node_server : INFO Cannot connect to host 217.142.18.179:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The semaphore timeout period has expired]
2026-08-20T12:35:41.161 2.7.3 full_node full_node_server : INFO Cannot connect to host 2a00:23cc:fb7c:1901:1d2d:9ef7:6be1:8ee:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The network location cannot be reached. For information about network troubleshooting, see Windows Help]
2026-08-20T12:35:43.409 2.7.3 full_node full_node_server : INFO Cannot connect to host 104.234.35.82:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The semaphore timeout period has expired]
2026-08-20T12:35:44.943 2.7.3 full_node full_node_server : INFO Cannot connect to host 2a06:4005:608b:1:6a05:caff:feb0:7367:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The network location cannot be reached. For information about network troubleshooting, see Windows Help]
2026-08-20T12:35:48.710 2.7.3 full_node full_node_server : INFO Cannot connect to host 240e:3a1:4470:3630:916b:27dc:98a7:a5fd:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The network location cannot be reached. For information about network troubleshooting, see Windows Help]
2026-08-20T12:35:49.957 2.7.3 full_node chia.full_node.full_node: INFO Re-checked peers: total of 2 peers with peak 9176652
2026-08-20T12:35:50.007 2.7.3 full_node chia.full_node.full_node: WARNING Not syncing, no peers with header_hash 4bbd1227b3a9b43bb7bd0dd7ae49ca7e9a0e0aafc2fae3e7b6deb3d1aa783fbb
2026-08-20T12:35:50.008 2.7.3 full_node chia.full_node.full_node: INFO Start syncing from fork point at 9175300 up to 9176652
2026-08-20T12:35:50.011 2.7.3 full_node chia.full_node.full_node: WARNING Not syncing, no peers with header_hash 4bbd1227b3a9b43bb7bd0dd7ae49ca7e9a0e0aafc2fae3e7b6deb3d1aa783fbb
2026-08-20T12:35:50.011 2.7.3 full_node chia.full_node.full_node: INFO peers with peak: 0
2026-08-20T12:35:50.011 2.7.3 full_node chia.full_node.full_node: ERROR failed fetching 9175300 to 9175331 from peers
2026-08-20T12:35:50.011 2.7.3 full_node chia.full_node.full_node: INFO long sync done
2026-08-20T12:35:50.012 2.7.3 full_node chia.full_node.full_node: INFO Updated peak to height 9176124, weight 55916630544, hh 8a32c7a6e7fee20ab13deb1799a535ff4114e6d13eeb9607224711ad27ca9ccb, ph 570aa9095714989264e23248337f2276e2d6ed1a35b35d7ca27132d2cd7aedd8, forked at 9175300, rh: cc59a0554fae8b7a1f9a9e164757bfabe2df9e2fba07fe6112d7a92fadb4013e, total iters: 104894457137778, overflow: False, deficit: 6, difficulty: 2432, sub slot iters: 574619648, Generator size: 4442, Generator ref list size: 0
2026-08-20T12:35:50.013 2.7.3 full_node chia.consensus.make_sub_epoch_summary: INFO make_sub_epoch_summary: height=9176125 < fork_height=4294967290, using None for challenge_root
2026-08-20T12:35:52.689 2.7.3 full_node chia.full_node.full_node: INFO Starting to perform sync.
2026-08-20T12:35:52.691 2.7.3 full_node chia.full_node.full_node: INFO Waiting to receive peaks from peers. (timeout: 30.0s)
2026-08-20T12:35:52.693 2.7.3 full_node chia.full_node.full_node: INFO Collected a total of 5 peaks.
2026-08-20T12:35:52.693 2.7.3 full_node chia.full_node.full_node: INFO Selected peak Peak(header_hash=<bytes32: 01c0b548c700dd72f426acb09cdb9f37495ce54335f676e9c41604294bb0cd66>, height=9176657, weight=55917926800)
2026-08-20T12:35:52.939 2.7.3 full_node chia.full_node.full_node: INFO Total of 2 peers with peak 9176657
2026-08-20T12:35:52.940 2.7.3 full_node chia.full_node.full_node: INFO Requesting weight proof from peer 80.120.94.65 up to height 9176657
2026-08-20T12:35:54.680 2.7.3 full_node full_node_server : INFO Cannot connect to host 87.17.165.139:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The semaphore timeout period has expired]
2026-08-20T12:36:04.643 2.7.3 full_node full_node_server : INFO Connected with full_node PeerInfo(_ip=IPv4Address('101.0.92.196'), _port=8444)
2026-08-20T12:36:05.113 2.7.3 full_node chia.full_node.weight_proof: INFO validating 23897 sub epochs
2026-08-20T12:36:05.146 2.7.3 full_node chia.full_node.full_node: INFO Ignoring new_compact_vdf, height 9176548 too recent.
2026-08-20T12:36:05.146 2.7.3 full_node chia.full_node.full_node: INFO Ignoring new_compact_vdf, height 9176547 too recent.
2026-08-20T12:36:05.146 2.7.3 full_node chia.full_node.weight_proof: INFO validate weight proof peak height 9176657
2026-08-20T12:36:05.243 2.7.3 full_node chia.full_node.full_node: INFO Ignoring new_compact_vdf, height 9176546 too recent.
2026-08-20T12:36:05.243 2.7.3 full_node chia.full_node.full_node: INFO Ignoring new_compact_vdf, height 9176545 too recent.
2026-08-20T12:36:13.539 2.7.3 full_node full_node_server : INFO Cannot connect to host 198.16.165.106:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The semaphore timeout period has expired]
2026-08-20T12:36:15.562 2.7.3 full_node full_node_server : INFO Cannot connect to host 36.48.114.247:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The remote computer refused the network connection]
2026-08-20T12:36:16.801 2.7.3 full_node full_node_server : INFO Cannot connect to host 2600:1700:3c90:1db0:1850:8fe7:4c72:273f:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The network location cannot be reached. For information about network troubleshooting, see Windows Help]
2026-08-20T12:36:17.307 2.7.3 full_node full_node_server : INFO Cannot connect to host 171.97.85.184:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The semaphore timeout period has expired]
2026-08-20T12:36:21.040 2.7.3 full_node full_node_server : INFO Cannot connect to host 83.23.106.19:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The semaphore timeout period has expired]
2026-08-20T12:36:21.321 2.7.3 full_node full_node_server : INFO Cannot connect to host 2001:818:c651:9c00:708a:73af:728a:a23e:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The network location cannot be reached. For information about network troubleshooting, see Windows Help]
2026-08-20T12:36:25.458 2.7.3 full_node chia.full_node.full_node: INFO Re-checked peers: total of 2 peers with peak 9176657
2026-08-20T12:36:25.517 2.7.3 full_node chia.full_node.full_node: WARNING Not syncing, no peers with header_hash 01c0b548c700dd72f426acb09cdb9f37495ce54335f676e9c41604294bb0cd66
2026-08-20T12:36:25.517 2.7.3 full_node chia.full_node.full_node: INFO Start syncing from fork point at 9175300 up to 9176657
2026-08-20T12:36:25.520 2.7.3 full_node chia.full_node.full_node: WARNING Not syncing, no peers with header_hash 01c0b548c700dd72f426acb09cdb9f37495ce54335f676e9c41604294bb0cd66
2026-08-20T12:36:25.520 2.7.3 full_node chia.full_node.full_node: INFO peers with peak: 0
2026-08-20T12:36:25.521 2.7.3 full_node chia.full_node.full_node: ERROR failed fetching 9175300 to 9175331 from peers
2026-08-20T12:36:25.521 2.7.3 full_node chia.full_node.full_node: INFO long sync done
2026-08-20T12:36:25.522 2.7.3 full_node chia.full_node.full_node: INFO Updated peak to height 9176124, weight 55916630544, hh 8a32c7a6e7fee20ab13deb1799a535ff4114e6d13eeb9607224711ad27ca9ccb, ph 570aa9095714989264e23248337f2276e2d6ed1a35b35d7ca27132d2cd7aedd8, forked at 9175300, rh: cc59a0554fae8b7a1f9a9e164757bfabe2df9e2fba07fe6112d7a92fadb4013e, total iters: 104894457137778, overflow: False, deficit: 6, difficulty: 2432, sub slot iters: 574619648, Generator size: 4442, Generator ref list size: 0
2026-08-20T12:36:25.522 2.7.3 full_node chia.consensus.make_sub_epoch_summary: INFO make_sub_epoch_summary: height=9176125 < fork_height=4294967290, using None for challenge_root
2026-08-20T12:36:28.827 2.7.3 full_node full_node_server : INFO Cannot connect to host 60.218.82.185:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The semaphore timeout period has expired]
2026-08-20T12:36:32.674 2.7.3 full_node chia.full_node.full_node: INFO Ignoring new_compact_vdf, height 9176548 too recent.
2026-08-20T12:36:32.682 2.7.3 full_node chia.full_node.full_node: INFO Ignoring new_compact_vdf, height 9176547 too recent.
2026-08-20T12:36:40.714 2.7.3 full_node chia.full_node.full_node: INFO Ignoring new_compact_vdf, height 9176546 too recent.
2026-08-20T12:36:42.824 2.7.3 full_node chia.full_node.full_node: INFO Ignoring new_compact_vdf, height 9176545 too recent.
2026-08-20T12:36:43.871 2.7.3 full_node full_node_server : INFO Cannot connect to host 2a12:26c0:2009:b400:fd96:7827:dde4:12da:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The network location cannot be reached. For information about network troubleshooting, see Windows Help]
2026-08-20T12:36:46.841 2.7.3 full_node full_node_server : INFO Cannot connect to host 194.44.137.198:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The semaphore timeout period has expired]
2026-08-20T12:36:48.401 2.7.3 full_node full_node_server : INFO Cannot connect to host 2001:b011:2015:b70e:d1c7:a90:bd65:569f:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The network location cannot be reached. For information about network troubleshooting, see Windows Help]
2026-08-20T12:36:51.371 2.7.3 full_node full_node_server : INFO Cannot connect to host 46.112.229.25:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The semaphore timeout period has expired]
2026-08-20T12:36:52.934 2.7.3 full_node full_node_server : INFO Cannot connect to host 2806:310:10a:8b69:95f9:76ab:563b:ec49:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The network location cannot be reached. For information about network troubleshooting, see Windows Help]
2026-08-20T12:36:55.886 2.7.3 full_node full_node_server : INFO Cannot connect to host 1.171.44.84:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The semaphore timeout period has expired]
2026-08-20T12:36:57.454 2.7.3 full_node full_node_server : INFO Cannot connect to host 2001:569:bdde:8d00:1d83:da0c:b87d:42d2:8444 ssl:<ssl.SSLContext object at 0x0000029CCA89CED0> [The network location cannot beSource: Chia-Network/chia-blockchain