Hello!
I don’t know if this is a problem specific to my 2.0.0-rc.22 installation, but I’m having an issue where an action which brings up the ‘Syncthing is saving changes. Please wait…’ message (e.g. adding a new remote device to a folder, or unpausing a paused folder) seems to largely hang the entire operation.
I’ve left Syncthing in this state for hours - and it hasn’t changed; I’ve refreshed the web interface, and it loads into the all-folders-are-unknown state - and then never updates. Only a close-and-restart restores operation.
CPU and RAM load do not look at all excessive during this state; not sure if the disk activity is unusual - but the databases for any of the folders I’m testing with aren’t extraordinarily large.
Here’s a log - I unpaused folder y9qce-aaaaa
at 07:11:30 (with a bit of preamble for context):
Wed Jun 25 06:30:50 IST 2025
Begin service_prestart
End service_prestart
Starting syncthing command /volume1/@appstore/syncthing/bin/syncthing serve --config=/volume1/@appdata/syncthing --data=/volume1/@appdata/syncthing
[start] 2025/06/25 06:30:50 INFO: syncthing v2.0.0-rc.22 "Hafnium Hornet" (go1.24.4 linux-amd64) builder@github.syncthing.net 2025-06-20 07:08:06 UTC [stguiassets]
[start] 2025/06/25 06:30:50 INFO: Automatic upgrade is always enabled for candidate releases.
[M45F6] 2025/06/25 06:30:51 INFO: My ID: M45F6VX-AAAAAAA-BBBBBBB-CCCCCCC-DDDDDDD-EEEEEEE-FFFFFFF-GGGGGGG
[M45F6] 2025/06/25 06:30:51 INFO: Hashing performance is 60.75 MB/s
[M45F6] 2025/06/25 06:30:51 INFO: Overall send rate is unlimited, receive rate is unlimited
[M45F6] 2025/06/25 06:30:51 INFO: Using discovery mechanism: global discovery server https://discovery-lookup.syncthing.net/v2/?noannounce
[M45F6] 2025/06/25 06:30:51 INFO: Using discovery mechanism: global discovery server https://discovery-announce-v4.syncthing.net/v2/?nolookup
[M45F6] 2025/06/25 06:30:51 INFO: Using discovery mechanism: global discovery server https://discovery-announce-v6.syncthing.net/v2/?nolookup
[M45F6] 2025/06/25 06:30:51 INFO: Using discovery mechanism: IPv4 local broadcast discovery on port 21027
[M45F6] 2025/06/25 06:30:51 INFO: Using discovery mechanism: IPv6 local multicast discovery on address [ff12::8384]:21027
[M45F6] 2025/06/25 06:30:51 INFO: Anonymous usage reporting is always enabled for candidate releases.
[M45F6] 2025/06/25 06:30:51 INFO: TCP listener ([::]:22000) starting
[M45F6] 2025/06/25 06:30:51 INFO: Relay listener (dynamic+https://relays.syncthing.net/endpoint) starting
2025/06/25 06:30:51 failed to sufficiently increase receive buffer size (was: 208 kiB, wanted: 7168 kiB, got: 416 kiB). See https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes for details.
[M45F6] 2025/06/25 06:30:51 INFO: GUI and API listening on [::]:7070
[M45F6] 2025/06/25 06:30:51 INFO: Access the GUI via the following URL: http://127.0.0.1:7070/
[M45F6] 2025/06/25 06:30:51 INFO: My name is "My-NAS"
...
[M45F6] 2025/06/25 07:11:08 INFO: Additional connection (+161) for device SEPDJWL at 192.168.1.4:22000-192.168.1.52:22000/tcp-client/TLS1.3-TLS_AES_128_GCM_SHA256/LAN-P10-62C6H7C47VV2QIBTS1RH415PH2
[M45F6] 2025/06/25 07:11:08 INFO: Established secure connection to UD7AGR2 at [::]:22000-192.168.0.31:22000/quic-client/TLS1.3-TLS_AES_128_GCM_SHA256/LAN-P20-62C6H7C4657A4D4CUMNI35GKI0
[M45F6] 2025/06/25 07:11:08 INFO: Additional connection (+150) for device UD7AGR2 at [::]:22000-192.168.0.31:22000/quic-client/TLS1.3-TLS_AES_128_GCM_SHA256/LAN-P20-62C6H7C4657A4D4CUMNI35GKI0
[M45F6] 2025/06/25 07:11:09 INFO: Abandoning old index handler for SEPDJWL (62C6H6SOTPORKD9H6QKU35E33C) in favour of 62C6H7C47VV2QIBTS1RH415PH2
[M45F6] 2025/06/25 07:11:09 INFO: Abandoning old index handler for 6FLFQJH (62C6H63K458LKTN6PA8B5VNH50) in favour of 62C6H78SQH0VID93BD01I0IMPK
[M45F6] 2025/06/25 07:11:09 INFO: Abandoning old index handler for UD7AGR2 (62C6H4ELLH5VQF9S0G606DTLS4) in favour of 62C6H7C4657A4D4CUMNI35GKI0
[M45F6] 2025/06/25 07:11:09 INFO: Abandoning old index handler for NN3I4DJ (62C6H664LVU64AI3KC82KTRPII) in favour of 62C6H7BE2SB3QBNEJTSQ8RJPOK
[M45F6] 2025/06/25 07:11:09 INFO: Device UD7AGR2 folder "Folder-Name-1" (y9qce-aaaaa) has a new index ID (0xAF160C3BD7312815)
[M45F6] 2025/06/25 07:11:13 INFO: Established secure connection to BJ6O5JO at [::]:22000-194.aaa.bbb.ccc:1053/quic-client/TLS1.3-TLS_AES_128_GCM_SHA256/WAN-P40-62C6H821Q2I1GG41GISITMP40E
[M45F6] 2025/06/25 07:11:13 INFO: Additional connection (+93) for device BJ6O5JO at [::]:22000-194.aaa.bbb.ccc:1053/quic-client/TLS1.3-TLS_AES_128_GCM_SHA256/WAN-P40-62C6H821Q2I1GG41GISITMP40E
[M45F6] 2025/06/25 07:11:14 INFO: Abandoning old index handler for BJ6O5JO (62C6H558UGDNCSSM8SA9RNM6IU) in favour of 62C6H821Q2I1GG41GISITMP40E
[M45F6] 2025/06/25 07:11:14 INFO: Device BJ6O5JO folder "Folder-Name-1" (y9qce-aaaaa) has a new index ID (0x80B824C3F86E6D72)
[M45F6] 2025/06/25 07:11:14 INFO: Established secure connection to UD7AGR2 at 192.168.1.4:22000-192.168.0.31:22000/quic-server/TLS1.3-TLS_AES_128_GCM_SHA256/LAN-P20-62C6H8502EPFSKD4QG9DMFJ9J8
[M45F6] 2025/06/25 07:11:14 INFO: Additional connection (+151) for device UD7AGR2 at 192.168.1.4:22000-192.168.0.31:22000/quic-server/TLS1.3-TLS_AES_128_GCM_SHA256/LAN-P20-62C6H8502EPFSKD4QG9DMFJ9J8
[M45F6] 2025/06/25 07:11:15 INFO: Abandoning old index handler for UD7AGR2 (62C6H7C4657A4D4CUMNI35GKI0) in favour of 62C6H8502EPFSKD4QG9DMFJ9J8
[M45F6] 2025/06/25 07:11:15 INFO: Device UD7AGR2 folder "Folder-Name-1" (y9qce-aaaaa) has a new index ID (0xAF160C3BD7312815)
[M45F6] 2025/06/25 07:11:18 INFO: Established secure connection to SEPDJWL at 192.168.1.4:22000-192.168.1.52:22000/quic-server/TLS1.3-TLS_AES_128_GCM_SHA256/LAN-P20-62C6H8K3ITCDCLFMEJMGO6OUOA
[M45F6] 2025/06/25 07:11:18 INFO: Additional connection (+162) for device SEPDJWL at 192.168.1.4:22000-192.168.1.52:22000/quic-server/TLS1.3-TLS_AES_128_GCM_SHA256/LAN-P20-62C6H8K3ITCDCLFMEJMGO6OUOA
[M45F6] 2025/06/25 07:11:19 INFO: Abandoning old index handler for SEPDJWL (62C6H7C47VV2QIBTS1RH415PH2) in favour of 62C6H8K3ITCDCLFMEJMGO6OUOA
[M45F6] 2025/06/25 07:11:29 INFO: Established secure connection to SEPDJWL at 192.168.1.4:22000-192.168.1.52:22000/tcp-client/TLS1.3-TLS_AES_128_GCM_SHA256/LAN-P10-62C6H9R1KG638TAFK1G2DAEQSI
[M45F6] 2025/06/25 07:11:29 INFO: Additional connection (+163) for device SEPDJWL at 192.168.1.4:22000-192.168.1.52:22000/tcp-client/TLS1.3-TLS_AES_128_GCM_SHA256/LAN-P10-62C6H9R1KG638TAFK1G2DAEQSI
[M45F6] 2025/06/25 07:11:29 INFO: Established secure connection to UD7AGR2 at 192.168.1.4:22000-192.168.0.31:22000/tcp-client/TLS1.3-TLS_AES_128_GCM_SHA256/LAN-P10-62C6H9R0EI6RILHDGJ36GMGQA4
[M45F6] 2025/06/25 07:11:29 INFO: Additional connection (+152) for device UD7AGR2 at 192.168.1.4:22000-192.168.0.31:22000/tcp-client/TLS1.3-TLS_AES_128_GCM_SHA256/LAN-P10-62C6H9R0EI6RILHDGJ36GMGQA4
[M45F6] 2025/06/25 07:11:29 INFO: Established secure connection to SDP4AYM at 192.168.1.4:22000-192.168.1.54:22000/tcp-client/TLS1.3-TLS_AES_128_GCM_SHA256/LAN-P10-62C6H9R29QOPETCNG09QCTI0T2
[M45F6] 2025/06/25 07:11:29 INFO: Additional connection (+47) for device SDP4AYM at 192.168.1.4:22000-192.168.1.54:22000/tcp-client/TLS1.3-TLS_AES_128_GCM_SHA256/LAN-P10-62C6H9R29QOPETCNG09QCTI0T2
[M45F6] 2025/06/25 07:11:29 INFO: Established secure connection to 6FLFQJH at 192.168.1.4:22000-192.168.1.101:22000/tcp-client/TLS1.3-TLS_AES_128_GCM_SHA256/LAN-P10-62C6H9RDMBUL6IS5STN0IMMVV4
[M45F6] 2025/06/25 07:11:29 INFO: Additional connection (+3) for device 6FLFQJH at 192.168.1.4:22000-192.168.1.101:22000/tcp-client/TLS1.3-TLS_AES_128_GCM_SHA256/LAN-P10-62C6H9RDMBUL6IS5STN0IMMVV4
[M45F6] 2025/06/25 07:11:30 INFO: Abandoning old index handler for SEPDJWL (62C6H8K3ITCDCLFMEJMGO6OUOA) in favour of 62C6H9R1KG638TAFK1G2DAEQSI
[M45F6] 2025/06/25 07:11:30 INFO: Abandoning old index handler for UD7AGR2 (62C6H8502EPFSKD4QG9DMFJ9J8) in favour of 62C6H9R0EI6RILHDGJ36GMGQA4
[M45F6] 2025/06/25 07:11:30 INFO: Abandoning old index handler for 6FLFQJH (62C6H78SQH0VID93BD01I0IMPK) in favour of 62C6H9RDMBUL6IS5STN0IMMVV4
[M45F6] 2025/06/25 07:11:30 INFO: Abandoning old index handler for SDP4AYM (62C6GUR7IQ36KC8M8VSL239LUA) in favour of 62C6H9R29QOPETCNG09QCTI0T2
[M45F6] 2025/06/25 07:11:30 INFO: Device SDP4AYM folder "Folder-Name-1" (y9qce-aaaaa) has a new index ID (0x08F718FA0D279036)
[M45F6] 2025/06/25 07:11:30 INFO: Device UD7AGR2 folder "Folder-Name-1" (y9qce-aaaaa) has a new index ID (0xAF160C3BD7312815)
[M45F6] 2025/06/25 07:11:30 INFO: Ready to synchronize "Folder-Name-2" (nzhy6-aaaaa) (sendreceive)
[M45F6] 2025/06/25 07:11:30 INFO: Device SEPDJWL folder "Folder-Name-2" (nzhy6-aaaaa) has mismatching index ID for us (0xCD7A8A514B1DCB28 != 0x42A675B41BEB4886)
[M45F6] 2025/06/25 07:11:30 INFO: Device SEPDJWL folder "Folder-Name-2" (nzhy6-aaaaa) has a new index ID (0x692030890D65307D)
[M45F6] 2025/06/25 07:11:31 INFO: Established secure connection to SEPDJWL at 192.168.1.4:22000-192.168.1.52:22000/tcp-server/TLS1.3-TLS_AES_128_GCM_SHA256/LAN-P10-62C6HA3DLDS1IMDML7B14INN8C
[M45F6] 2025/06/25 07:13:50 INFO: Unexpected folder "Folder-Name-3" (zafbk-aaaaa) sent from device "BJ6O5JO-AAAAAAA-BBBBBBB-CCCCCCC-DDDDDDD-EEEEEEE-FFFFFFF-GGGGGGG"; ensure that the folder exists and that this device is selected under "Share With" in the folder configuration.
[M45F6] 2025/06/25 07:15:07 INFO: Unexpected folder "Folder-Name-3" (zafbk-aaaaa) sent from device "BJ6O5JO-AAAAAAA-BBBBBBB-CCCCCCC-DDDDDDD-EEEEEEE-FFFFFFF-GGGGGGG"; ensure that the folder exists and that this device is selected under "Share With" in the folder configuration.
The log would then continue with these last two messages periodically (folder zafbk-aaaaa
had previously been removed for troubleshooting, but now I can’t add it back!), but with no other activity visible.
Am I alone with these issues? Happy to try and produce more detailed logs if that would help.