[Bug]: SFTPGO_HOOK__MEMORY_PIPES__ENABLED env variable not working #2109
Description
⚠️ This issue respects the following points: ⚠️
- This is a bug, not a question or a configuration issue.
- This issue is not already reported on Github (I've searched it).
Bug description
Hello.
I enabled the SFTPGO_HOOK__MEMORY_PIPES__ENABLED=1 in sftpgo.env and restart the sftpgo service but when i initiate a transfer to a S3 backend i see with lsof | grep -i deleted | grep sftp command that sftp go still writes local temp files. Why is this happening?
sftpgo 18123 sftpgo 13u REG 253,0 47333376 35270758 /tmp/pipefile2148839408 (deleted)
sftpgo 18123 18125 sftpgo sftpgo 13u REG 253,0 47333376 35270758 /tmp/pipefile2148839408 (deleted)
sftpgo 18123 18126 sftpgo sftpgo 13u REG 253,0 47333376 35270758 /tmp/pipefile2148839408 (deleted)
sftpgo 18123 18127 sftpgo sftpgo 13u REG 253,0 47333376 35270758 /tmp/pipefile2148839408 (deleted)
sftpgo 18123 18128 sftpgo sftpgo 13u REG 253,0 47333376 35270758 /tmp/pipefile2148839408 (deleted)
sftpgo 18123 18129 sftpgo sftpgo 13u REG 253,0 47333376 35270758 /tmp/pipefile2148839408 (deleted)
sftpgo 18123 18130 sftpgo sftpgo 13u REG 253,0 47333376 35270758 /tmp/pipefile2148839408 (deleted)
sftpgo 18123 18131 sftpgo sftpgo 13u REG 253,0 47333376 35270758 /tmp/pipefile2148839408 (deleted)
sftpgo 18123 18132 sftpgo sftpgo 13u REG 253,0 47333376 35270758 /tmp/pipefile2148839408 (deleted)
sftpgo 18123 18134 sftpgo sftpgo 13u REG 253,0 47333376 35270758 /tmp/pipefile2148839408 (deleted)
sftpgo 18123 18185 sftpgo sftpgo 13u REG 253,0 47333376 35270758 /tmp/pipefile2148839408 (deleted)
sftpgo 18123 18186 sftpgo sftpgo 13u REG 253,0 47333376 35270758 /tmp/pipefile2148839408 (deleted)
sftpgo 18123 18205 sftpgo sftpgo 13u REG 253,0 47333376 35270758 /tmp/pipefile2148839408 (deleted)
sftpgo 18123 18206 sftpgo sftpgo 13u REG 253,0 47333376 35270758 /tmp/pipefile2148839408 (deleted)
Steps to reproduce
Expected behavior
It should not create local temp files
SFTPGo version
2.7.0
Data provider
S3
Installation method
Community RPM package
Configuration
{
"common": {
"idle_timeout": 15,
"upload_mode": 0,
"actions": {
"execute_on": [],
"execute_sync": [],
"hook": ""
},
"setstat_mode": 0,
"rename_mode": 0,
"resume_max_size": 0,
"temp_path": "",
"proxy_protocol": 0,
"proxy_allowed": [],
"proxy_skipped": [],
"startup_hook": "",
"post_connect_hook": "",
"post_disconnect_hook": "",
"max_total_connections": 0,
"max_per_host_connections": 20,
"allowlist_status": 0,
"allow_self_connections": 0,
"umask": "",
"server_version": "",
"tz": "",
"metadata": {
"read": 0
},
"defender": {
"enabled": false,
"driver": "memory",
"ban_time": 30,
"ban_time_increment": 50,
"threshold": 15,
"score_invalid": 2,
"score_valid": 1,
"score_limit_exceeded": 3,
"score_no_auth": 0,
"observation_time": 30,
"entries_soft_limit": 100,
"entries_hard_limit": 150,
"login_delay": {
"success": 0,
"password_failed": 1000
}
},
"rate_limiters": [
{
"average": 0,
"period": 1000,
"burst": 1,
"type": 2,
"protocols": [
"SSH",
"FTP",
"DAV",
"HTTP"
],
"generate_defender_events": false,
"entries_soft_limit": 100,
"entries_hard_limit": 150
}
],
"event_manager": {
"enabled_commands": []
}
},
"acme": {
"domains": [],
"email": "",
"key_type": "4096",
"certs_path": "/var/lib/sftpgo/certs",
"ca_endpoint": "https://acme-v02.api.letsencrypt.org/directory",
"renew_days": 30,
"http01_challenge": {
"port": 80,
"proxy_header": "",
"webroot": ""
},
"tls_alpn01_challenge": {
"port": 0
}
},
"sftpd": {
"bindings": [
{
"port": 2022,
"address": "",
"apply_proxy_config": true
}
],
"max_auth_tries": 0,
"host_keys": [],
"host_certificates": [],
"host_key_algorithms": [],
"kex_algorithms": [],
"ciphers": [],
"macs": [],
"public_key_algorithms": [],
"trusted_user_ca_keys": [],
"revoked_user_certs_file": "",
"login_banner_file": "",
"enabled_ssh_commands": [
"md5sum",
"sha1sum",
"sha256sum",
"cd",
"pwd",
"scp"
],
"keyboard_interactive_authentication": true,
"keyboard_interactive_auth_hook": "",
"password_authentication": true
},
"ftpd": {
"bindings": [
{
"port": 0,
"address": "",
"apply_proxy_config": true,
"tls_mode": 0,
"certificate_file": "",
"certificate_key_file": "",
"min_tls_version": 12,
"force_passive_ip": "",
"passive_ip_overrides": [],
"passive_host": "",
"client_auth_type": 0,
"tls_cipher_suites": [],
"passive_connections_security": 0,
"active_connections_security": 0,
"debug": false
}
],
"banner_file": "",
"active_transfers_port_non_20": true,
"passive_port_range": {
"start": 50000,
"end": 50100
},
"disable_active_mode": false,
"enable_site": false,
"hash_support": 0,
"combine_support": 0,
"certificate_file": "",
"certificate_key_file": "",
"ca_certificates": [],
"ca_revocation_lists": []
},
"webdavd": {
"bindings": [
{
"port": 0,
"address": "",
"enable_https": false,
"certificate_file": "",
"certificate_key_file": "",
"min_tls_version": 12,
"client_auth_type": 0,
"tls_cipher_suites": [],
"tls_protocols": [],
"prefix": "",
"proxy_mode": 0,
"proxy_allowed": [],
"client_ip_proxy_header": "",
"client_ip_header_depth": 0,
"disable_www_auth_header": false
}
],
"certificate_file": "",
"certificate_key_file": "",
"ca_certificates": [],
"ca_revocation_lists": [],
"cors": {
"enabled": false,
"allowed_origins": [],
"allowed_methods": [],
"allowed_headers": [],
"exposed_headers": [],
"allow_credentials": false,
"max_age": 0,
"options_passthrough": false,
"options_success_status": 0,
"allow_private_network": false
},
"cache": {
"users": {
"expiration_time": 0,
"max_size": 50
},
"mime_types": {
"enabled": true,
"max_size": 1000,
"custom_mappings": []
}
}
},
"data_provider": {
"driver": "sqlite",
"name": "/var/lib/sftpgo/sftpgo.db",
"host": "",
"port": 0,
"username": "",
"password": "",
"sslmode": 0,
"disable_sni": false,
"target_session_attrs": "",
"root_cert": "",
"client_cert": "",
"client_key": "",
"connection_string": "",
"sql_tables_prefix": "",
"track_quota": 2,
"delayed_quota_update": 0,
"pool_size": 0,
"users_base_dir": "/srv/sftpgo/data",
"actions": {
"execute_on": [],
"execute_for": [],
"hook": ""
},
"external_auth_hook": "",
"external_auth_scope": 0,
"pre_login_hook": "",
"post_login_hook": "",
"post_login_scope": 0,
"check_password_hook": "",
"check_password_scope": 0,
"password_hashing": {
"bcrypt_options": {
"cost": 10
},
"argon2_options": {
"memory": 65536,
"iterations": 1,
"parallelism": 2
},
"algo": "bcrypt"
},
"password_validation": {
"admins": {
"min_entropy": 0
},
"users": {
"min_entropy": 0
}
},
"password_caching": true,
"update_mode": 0,
"create_default_admin": false,
"naming_rules": 5,
"is_shared": 0,
"node": {
"host": "",
"port": 0,
"proto": "http"
},
"backups_path": "/srv/sftpgo/backups"
},
"httpd": {
"bindings": [
{
"port": 8080,
"address": "",
"enable_web_admin": true,
"enable_web_client": true,
"enable_rest_api": true,
"enabled_login_methods": 0,
"disabled_login_methods": 0,
"enable_https": false,
"certificate_file": "",
"certificate_key_file": "",
"min_tls_version": 12,
"client_auth_type": 0,
"tls_cipher_suites": [],
"tls_protocols": [],
"proxy_mode": 0,
"proxy_allowed": [],
"client_ip_proxy_header": "",
"client_ip_header_depth": 0,
"hide_login_url": 0,
"render_openapi": true,
"languages": [
"en"
],
"oidc": {
"client_id": "",
"client_secret": "",
"client_secret_file": "",
"config_url": "",
"redirect_base_url": "",
"scopes": [
"openid",
"profile",
"email"
],
"username_field": "",
"role_field": "",
"implicit_roles": false,
"custom_fields": [],
"insecure_skip_signature_check": false,
"debug": false
},
"security": {
"enabled": false,
"allowed_hosts": [],
"allowed_hosts_are_regex": false,
"hosts_proxy_headers": [],
"https_redirect": false,
"https_host": "",
"https_proxy_headers": [],
"sts_seconds": 0,
"sts_include_subdomains": false,
"sts_preload": false,
"content_type_nosniff": false,
"content_security_policy": "",
"permissions_policy": "",
"cross_origin_opener_policy": "",
"cross_origin_resource_policy": "",
"cross_origin_embedder_policy": "",
"referrer_policy": "",
"cache_control": ""
},
"branding": {
"web_admin": {
"name": "",
"short_name": "",
"favicon_path": "",
"logo_path": "",
"disclaimer_name": "",
"disclaimer_path": "",
"default_css": [],
"extra_css": []
},
"web_client": {
"name": "",
"short_name": "",
"favicon_path": "",
"logo_path": "",
"disclaimer_name": "",
"disclaimer_path": "",
"default_css": [],
"extra_css": []
}
}
}
],
"templates_path": "templates",
"static_files_path": "static",
"openapi_path": "openapi",
"web_root": "",
"certificate_file": "",
"certificate_key_file": "",
"ca_certificates": [],
"ca_revocation_lists": [],
"signing_passphrase": "",
"signing_passphrase_file": "",
"token_validation": 0,
"cookie_lifetime": 20,
"share_cookie_lifetime": 120,
"jwt_lifetime": 20,
"max_upload_file_size": 0,
"cors": {
"enabled": false,
"allowed_origins": [],
"allowed_methods": [],
"allowed_headers": [],
"exposed_headers": [],
"allow_credentials": false,
"max_age": 0,
"options_passthrough": false,
"options_success_status": 0,
"allow_private_network": false
},
"setup": {
"installation_code": "",
"installation_code_hint": "Installation code"
},
"hide_support_link": false
},
"telemetry": {
"bind_port": 0,
"bind_address": "127.0.0.1",
"enable_profiler": false,
"auth_user_file": "",
"certificate_file": "",
"certificate_key_file": "",
"min_tls_version": 12,
"tls_cipher_suites": [],
"tls_protocols": []
},
"http": {
"timeout": 20,
"retry_wait_min": 2,
"retry_wait_max": 30,
"retry_max": 3,
"ca_certificates": [],
"certificates": [],
"skip_tls_verify": false,
"headers": []
},
"command": {
"timeout": 30,
"env": [],
"commands": []
},
"kms": {
"secrets": {
"url": "",
"master_key": "",
"master_key_path": ""
}
},
"mfa": {
"totp": [
{
"name": "Default",
"issuer": "SFTPGo",
"algo": "sha1"
}
]
},
"smtp": {
"host": "",
"port": 587,
"from": "",
"user": "",
"password": "",
"auth_type": 0,
"encryption": 0,
"domain": "",
"templates_path": "templates",
"debug": 0,
"oauth2": {
"provider": 0,
"tenant": "",
"client_id": "",
"client_secret": "",
"refresh_token": ""
}
},
"plugins": []
}
Relevant log output
{
"level": "debug",
"time": "2025-11-17T14:00:59.002",
"sender": "common",
"message": "waiting for the update of the transfers current size"
}
{
"level": "debug",
"time": "2025-11-17T14:00:59.002",
"sender": "common",
"message": "getting overquota transfers"
}
{
"level": "debug",
"time": "2025-11-17T14:00:59.002",
"sender": "common",
"message": "number of overquota transfers: 0"
}What are you using SFTPGo for?
Private user, home usecase (home backup/VPS)
Additional info
No response