NCP shows Nextcloud check: error and background jobs not running

Nextcloud version (eg, 20.0.5): 24.0.5
Operating system and version (eg, Ubuntu 20.04): Debian GNU/Linux 11. 5.15.32-v8+ (aarch64)
Apache or nginx version (eg, Apache 2.4.25): 2.4.54
PHP version (eg, 7.4): 8.1.11

The issue you are facing:
NCP Admin webpanel shows Nextcloud check: error then I discovered that background jobs haven’t been running for 2 months. I tried rebooting, updating NCP, upgrading Nextcloud (failed though and it says Nextcloud is down). The thing is, Nextcloud works fine despite all these. Backups and snapshots stopped working since 2 months ago too. I backed track and its seems like the issue started after I upgraded from NC23 to NC 24. Can’t remember anymore but I think it also upgraded from PHP 7 to PHP 8.

Is this the first time you’ve seen this error? (Y/N): Y

The output of your Nextcloud log in Admin > Logging:


/usr/local/bin/ncc: line 3: 261652 Segmentation fault      ${SUDO} php /var/www/nextcloud/occ "$@"
NextCloudPi version  v1.50.3
NextCloudPi image    NextCloudPi_10-08-21
OS                   Debian GNU/Linux 11. 5.15.32-v8+ (aarch64)
automount            yes
USB devices          sda sdb 
datadir              /media/myCloudDrive/ncdata
data in SD           no
data filesystem      btrfs
data disk usage      147G/466G
rootfs usage         5.0G/30G
swapfile             /var/swap
dbdir                /var/lib/mysql
Nextcloud check      error
HTTPD service        up
PHP service          up
MariaDB service      up
Redis service        up
HPB service          down
Postfix service      up
Internet check       no
public IP            ***REMOVED SENSITIVE VALUE***
public IP            ***REMOVED SENSITIVE VALUE***
Port check 80        closed
Port check 443       closed
IP                   ***REMOVED SENSITIVE VALUE***
gateway              ***REMOVED SENSITIVE VALUE***
Interface            enxb827eb36ec12
certificates         ***REMOVED SENSITIVE VALUE***
NAT loopback         no
Uptime               20:24

Nextcloud configuration

/usr/local/bin/ncp-report: line 48: 261779 Segmentation fault      sudo -u www-data php /var/www/nextcloud/occ config:list system

HTTPd logs

[Sat Dec 17 07:01:58.925690 2022] [authz_host:error] [pid 201717:tid 547663237504] [client 192.168.1.13:49486] AH01753: access check of 'localhost' to / failed, reason: unable to get the remote host name
[Sat Dec 17 07:01:58.930627 2022] [authz_host:error] [pid 201717:tid 547663237504] [client 192.168.1.13:49486] AH01753: access check of 'localhost' to /index.php failed, reason: unable to get the remote host name
[Sat Dec 17 07:01:58.971312 2022] [authz_host:error] [pid 201717:tid 547663237504] [client 192.168.1.13:49486] AH01753: access check of 'localhost' to /index.php failed, reason: unable to get the remote host name
[Sat Dec 17 07:02:03.463176 2022] [authz_host:error] [pid 201717:tid 547663237504] [client 192.168.1.13:49486] AH01753: access check of 'localhost' to /js/minified.js failed, reason: unable to get the remote host name
[Sat Dec 17 07:02:03.463193 2022] [authz_host:error] [pid 201717:tid 547646435712] [client 192.168.1.13:49486] AH01753: access check of 'localhost' to /js/ncp.js failed, reason: unable to get the remote host name
[Sat Dec 17 07:02:03.464118 2022] [authz_host:error] [pid 201717:tid 547671630208] [client 192.168.1.13:49486] AH01753: access check of 'localhost' to /img/loading-small.gif failed, reason: unable to get the remote host name
[Sat Dec 17 07:02:03.464816 2022] [authz_host:error] [pid 201717:tid 547638034816] [client 192.168.1.13:49486] AH01753: access check of 'localhost' to /img/ncp-logo.svg failed, reason: unable to get the remote host name
[Sat Dec 17 07:02:03.504016 2022] [authz_host:error] [pid 201717:tid 547654836608] [client 192.168.1.13:49486] AH01753: access check of 'localhost' to /css/ncp.css failed, reason: unable to get the remote host name
[Sat Dec 17 07:02:03.533246 2022] [authz_host:error] [pid 201717:tid 547654836608] [client 192.168.1.13:49486] AH01753: access check of 'localhost' to /ncp-output.php failed, reason: unable to get the remote host name
[Sat Dec 17 07:02:03.542726 2022] [authz_host:error] [pid 201717:tid 547646435712] [client 192.168.1.13:49486] AH01753: access check of 'localhost' to /ncp-launcher.php failed, reason: unable to get the remote host name
[Sat Dec 17 07:02:19.394834 2022] [authz_host:error] [pid 201717:tid 547646435712] [client 192.168.1.13:49486] AH01753: access check of 'localhost' to /ncp-launcher.php failed, reason: unable to get the remote host name
[Sat Dec 17 07:02:22.993851 2022] [authz_host:error] [pid 201717:tid 547646435712] [client 192.168.1.13:49486] AH01753: access check of 'localhost' to /ncp-launcher.php failed, reason: unable to get the remote host name
[Sat Dec 17 07:39:31.516681 2022] [authz_host:error] [pid 201717:tid 547646435712] [client 192.168.1.13:49486] AH01753: access check of 'localhost' to / failed, reason: unable to get the remote host name
[Sat Dec 17 07:39:31.605749 2022] [authz_host:error] [pid 201717:tid 547646435712] [client 192.168.1.13:49486] AH01753: access check of 'localhost' to / failed, reason: unable to get the remote host name
[Sat Dec 17 07:39:31.608608 2022] [authz_host:error] [pid 201717:tid 547646435712] [client 192.168.1.13:49486] AH01753: access check of 'localhost' to /index.php failed, reason: unable to get the remote host name
[Sat Dec 17 07:39:31.650123 2022] [authz_host:error] [pid 201717:tid 547646435712] [client 192.168.1.13:49486] AH01753: access check of 'localhost' to /index.php failed, reason: unable to get the remote host name
[Sat Dec 17 07:39:36.469390 2022] [authz_host:error] [pid 201717:tid 547646435712] [client 192.168.1.13:49486] AH01753: access check of 'localhost' to /ncp-output.php failed, reason: unable to get the remote host name
[Sat Dec 17 07:39:36.481355 2022] [authz_host:error] [pid 201717:tid 547654836608] [client 192.168.1.13:49486] AH01753: access check of 'localhost' to /ncp-launcher.php failed, reason: unable to get the remote host name
[Sat Dec 17 07:39:53.258868 2022] [authz_host:error] [pid 201717:tid 547654836608] [client 192.168.1.13:49486] AH01753: access check of 'localhost' to /ncp-launcher.php failed, reason: unable to get the remote host name
[Sat Dec 17 07:39:57.503721 2022] [authz_host:error] [pid 201717:tid 547654836608] [client 192.168.1.13:49486] AH01753: access check of 'localhost' to /ncp-launcher.php failed, reason: unable to get the remote host name

Database logs

2022-06-10 11:02:45 0 [Note] InnoDB: 10.3.34 started; log sequence number 714516850; transaction id 262868
2022-06-10 11:02:45 0 [Note] InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool
2022-06-10 11:02:45 0 [Note] Plugin 'FEEDBACK' is disabled.
2022-06-10 11:02:45 0 [Note] Server socket created on IP: '127.0.0.1'.
2022-06-10 11:02:45 0 [Note] Reading of all Master_info entries succeeded
2022-06-10 11:02:45 0 [Note] Added new Master_info '' to hash table
2022-06-10 11:02:45 0 [Note] /usr/sbin/mysqld: ready for connections.
Version: '10.3.34-MariaDB-0+deb10u1'  socket: '/run/mysqld/mysqld.sock'  port: 3306  Debian 10
2022-06-10 11:02:49 0 [Note] InnoDB: Buffer pool(s) load completed at 220610 11:02:49
2022-06-10 11:24:03 0 [Note] /usr/sbin/mysqld (initiated by: unknown): Normal shutdown
2022-06-10 11:24:03 0 [Note] Event Scheduler: Purging the queue. 0 events
2022-06-10 11:24:03 0 [Note] InnoDB: FTS optimize thread exiting.
2022-06-10 11:24:03 0 [Note] InnoDB: Starting shutdown...
2022-06-10 11:24:03 0 [Note] InnoDB: Dumping buffer pool(s) to /var/lib/mysql/ib_buffer_pool
2022-06-10 11:24:03 0 [Note] InnoDB: Instance 0, restricted to 4096 pages due to innodb_buf_pool_dump_pct=25
2022-06-10 11:24:03 0 [Note] InnoDB: Buffer pool(s) dump completed at 220610 11:24:03
2022-06-10 11:24:05 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1"
2022-06-10 11:24:05 0 [Note] InnoDB: Shutdown completed; log sequence number 714707942; transaction id 263116
2022-06-10 11:24:05 0 [Note] /usr/sbin/mysqld: Shutdown complete


Nextcloud logs

{"reqId":"Y52BK4SreZp4UutncY76GAABRwQ","level":3,"time":"2022-12-17T08:44:08+00:00","remoteAddr":"112.202.200.25","user":"kugiigi","app":"PHP","method":"POST","url":"/index.php/apps/mail/api/mailboxes/4/sync","message":"Undefined array key 241910 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#145","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36","version":"24.0.5.1","exception":{"Exception":"Error","Message":"Undefined array key 241910 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#145","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/mail/lib/Cache/Cache.php","line":145,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"function":"save","class":"OCA\\Mail\\Cache\\Cache","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"}}
{"reqId":"Y52BK4SreZp4UutncY76GAABRwQ","level":3,"time":"2022-12-17T08:44:08+00:00","remoteAddr":"112.202.200.25","user":"kugiigi","app":"PHP","method":"POST","url":"/index.php/apps/mail/api/mailboxes/4/sync","message":"Undefined array key 241910 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#147","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36","version":"24.0.5.1","exception":{"Exception":"Error","Message":"Undefined array key 241910 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#147","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/mail/lib/Cache/Cache.php","line":147,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"function":"save","class":"OCA\\Mail\\Cache\\Cache","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"}}
{"reqId":"Y52BZoSreZp4UutncY76MgABRwQ","level":3,"time":"2022-12-17T08:44:31+00:00","remoteAddr":"112.202.200.25","user":"kugiigi","app":"PHP","method":"GET","url":"/index.php/apps/mail/api/messages?mailboxId=4&limit=20","message":"Undefined array key 241950 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#145","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36","version":"24.0.5.1","exception":{"Exception":"Error","Message":"Undefined array key 241950 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#145","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/mail/lib/Cache/Cache.php","line":145,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"function":"save","class":"OCA\\Mail\\Cache\\Cache","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"}}
{"reqId":"Y52BZoSreZp4UutncY76MgABRwQ","level":3,"time":"2022-12-17T08:44:31+00:00","remoteAddr":"112.202.200.25","user":"kugiigi","app":"PHP","method":"GET","url":"/index.php/apps/mail/api/messages?mailboxId=4&limit=20","message":"Undefined array key 241950 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#147","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36","version":"24.0.5.1","exception":{"Exception":"Error","Message":"Undefined array key 241950 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#147","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/mail/lib/Cache/Cache.php","line":147,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"function":"save","class":"OCA\\Mail\\Cache\\Cache","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"}}
{"reqId":"Y52BZoSreZp4UutncY76MgABRwQ","level":3,"time":"2022-12-17T08:44:31+00:00","remoteAddr":"112.202.200.25","user":"kugiigi","app":"PHP","method":"GET","url":"/index.php/apps/mail/api/messages?mailboxId=4&limit=20","message":"Undefined array key 241952 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#145","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36","version":"24.0.5.1","exception":{"Exception":"Error","Message":"Undefined array key 241952 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#145","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/mail/lib/Cache/Cache.php","line":145,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"function":"save","class":"OCA\\Mail\\Cache\\Cache","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"}}
{"reqId":"Y52BZoSreZp4UutncY76MgABRwQ","level":3,"time":"2022-12-17T08:44:31+00:00","remoteAddr":"112.202.200.25","user":"kugiigi","app":"PHP","method":"GET","url":"/index.php/apps/mail/api/messages?mailboxId=4&limit=20","message":"Undefined array key 241952 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#147","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36","version":"24.0.5.1","exception":{"Exception":"Error","Message":"Undefined array key 241952 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#147","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/mail/lib/Cache/Cache.php","line":147,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"function":"save","class":"OCA\\Mail\\Cache\\Cache","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"}}
{"reqId":"Y52BZoSreZp4UutncY76MgABRwQ","level":3,"time":"2022-12-17T08:44:31+00:00","remoteAddr":"112.202.200.25","user":"kugiigi","app":"PHP","method":"GET","url":"/index.php/apps/mail/api/messages?mailboxId=4&limit=20","message":"Undefined array key 241958 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#145","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36","version":"24.0.5.1","exception":{"Exception":"Error","Message":"Undefined array key 241958 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#145","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/mail/lib/Cache/Cache.php","line":145,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"function":"save","class":"OCA\\Mail\\Cache\\Cache","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"}}
{"reqId":"Y52BZoSreZp4UutncY76MgABRwQ","level":3,"time":"2022-12-17T08:44:31+00:00","remoteAddr":"112.202.200.25","user":"kugiigi","app":"PHP","method":"GET","url":"/index.php/apps/mail/api/messages?mailboxId=4&limit=20","message":"Undefined array key 241958 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#147","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36","version":"24.0.5.1","exception":{"Exception":"Error","Message":"Undefined array key 241958 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#147","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/mail/lib/Cache/Cache.php","line":147,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"function":"save","class":"OCA\\Mail\\Cache\\Cache","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"}}
{"reqId":"Y52BZoSreZp4UutncY76MgABRwQ","level":3,"time":"2022-12-17T08:44:31+00:00","remoteAddr":"112.202.200.25","user":"kugiigi","app":"PHP","method":"GET","url":"/index.php/apps/mail/api/messages?mailboxId=4&limit=20","message":"Undefined array key 241959 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#145","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36","version":"24.0.5.1","exception":{"Exception":"Error","Message":"Undefined array key 241959 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#145","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/mail/lib/Cache/Cache.php","line":145,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"function":"save","class":"OCA\\Mail\\Cache\\Cache","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"}}
{"reqId":"Y52BZoSreZp4UutncY76MgABRwQ","level":3,"time":"2022-12-17T08:44:31+00:00","remoteAddr":"112.202.200.25","user":"kugiigi","app":"PHP","method":"GET","url":"/index.php/apps/mail/api/messages?mailboxId=4&limit=20","message":"Undefined array key 241959 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#147","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36","version":"24.0.5.1","exception":{"Exception":"Error","Message":"Undefined array key 241959 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#147","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/mail/lib/Cache/Cache.php","line":147,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"function":"save","class":"OCA\\Mail\\Cache\\Cache","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"}}
{"reqId":"Y52BZoSreZp4UutncY76MgABRwQ","level":3,"time":"2022-12-17T08:44:31+00:00","remoteAddr":"112.202.200.25","user":"kugiigi","app":"PHP","method":"GET","url":"/index.php/apps/mail/api/messages?mailboxId=4&limit=20","message":"Undefined array key 262005 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#145","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36","version":"24.0.5.1","exception":{"Exception":"Error","Message":"Undefined array key 262005 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#145","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/mail/lib/Cache/Cache.php","line":145,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"function":"save","class":"OCA\\Mail\\Cache\\Cache","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"}}
{"reqId":"Y52BZoSreZp4UutncY76MgABRwQ","level":3,"time":"2022-12-17T08:44:31+00:00","remoteAddr":"112.202.200.25","user":"kugiigi","app":"PHP","method":"GET","url":"/index.php/apps/mail/api/messages?mailboxId=4&limit=20","message":"Undefined array key 262005 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#147","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36","version":"24.0.5.1","exception":{"Exception":"Error","Message":"Undefined array key 262005 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#147","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/mail/lib/Cache/Cache.php","line":147,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"function":"save","class":"OCA\\Mail\\Cache\\Cache","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"}}
{"reqId":"Y52BZoSreZp4UutncY76MgABRwQ","level":3,"time":"2022-12-17T08:44:31+00:00","remoteAddr":"112.202.200.25","user":"kugiigi","app":"PHP","method":"GET","url":"/index.php/apps/mail/api/messages?mailboxId=4&limit=20","message":"Undefined array key 262009 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#145","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36","version":"24.0.5.1","exception":{"Exception":"Error","Message":"Undefined array key 262009 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#145","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/mail/lib/Cache/Cache.php","line":145,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"function":"save","class":"OCA\\Mail\\Cache\\Cache","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"}}
{"reqId":"Y52BZoSreZp4UutncY76MgABRwQ","level":3,"time":"2022-12-17T08:44:31+00:00","remoteAddr":"112.202.200.25","user":"kugiigi","app":"PHP","method":"GET","url":"/index.php/apps/mail/api/messages?mailboxId=4&limit=20","message":"Undefined array key 262009 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#147","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36","version":"24.0.5.1","exception":{"Exception":"Error","Message":"Undefined array key 262009 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#147","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/mail/lib/Cache/Cache.php","line":147,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"function":"save","class":"OCA\\Mail\\Cache\\Cache","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"}}
{"reqId":"Y52BZoSreZp4UutncY76MgABRwQ","level":3,"time":"2022-12-17T08:44:31+00:00","remoteAddr":"112.202.200.25","user":"kugiigi","app":"PHP","method":"GET","url":"/index.php/apps/mail/api/messages?mailboxId=4&limit=20","message":"Undefined array key 262015 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#145","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36","version":"24.0.5.1","exception":{"Exception":"Error","Message":"Undefined array key 262015 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#145","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/mail/lib/Cache/Cache.php","line":145,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"function":"save","class":"OCA\\Mail\\Cache\\Cache","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"}}
{"reqId":"Y52BZoSreZp4UutncY76MgABRwQ","level":3,"time":"2022-12-17T08:44:31+00:00","remoteAddr":"112.202.200.25","user":"kugiigi","app":"PHP","method":"GET","url":"/index.php/apps/mail/api/messages?mailboxId=4&limit=20","message":"Undefined array key 262015 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#147","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36","version":"24.0.5.1","exception":{"Exception":"Error","Message":"Undefined array key 262015 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#147","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/mail/lib/Cache/Cache.php","line":147,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"function":"save","class":"OCA\\Mail\\Cache\\Cache","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"}}
{"reqId":"Y52BZoSreZp4UutncY76MgABRwQ","level":3,"time":"2022-12-17T08:44:31+00:00","remoteAddr":"112.202.200.25","user":"kugiigi","app":"PHP","method":"GET","url":"/index.php/apps/mail/api/messages?mailboxId=4&limit=20","message":"Undefined array key 262029 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#145","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36","version":"24.0.5.1","exception":{"Exception":"Error","Message":"Undefined array key 262029 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#145","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/mail/lib/Cache/Cache.php","line":145,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"function":"save","class":"OCA\\Mail\\Cache\\Cache","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"}}
{"reqId":"Y52BZoSreZp4UutncY76MgABRwQ","level":3,"time":"2022-12-17T08:44:31+00:00","remoteAddr":"112.202.200.25","user":"kugiigi","app":"PHP","method":"GET","url":"/index.php/apps/mail/api/messages?mailboxId=4&limit=20","message":"Undefined array key 262029 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#147","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36","version":"24.0.5.1","exception":{"Exception":"Error","Message":"Undefined array key 262029 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#147","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/mail/lib/Cache/Cache.php","line":147,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"function":"save","class":"OCA\\Mail\\Cache\\Cache","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"}}
{"reqId":"Y52BZoSreZp4UutncY76MgABRwQ","level":3,"time":"2022-12-17T08:44:31+00:00","remoteAddr":"112.202.200.25","user":"kugiigi","app":"PHP","method":"GET","url":"/index.php/apps/mail/api/messages?mailboxId=4&limit=20","message":"Undefined array key 262033 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#145","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36","version":"24.0.5.1","exception":{"Exception":"Error","Message":"Undefined array key 262033 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#145","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/mail/lib/Cache/Cache.php","line":145,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"function":"save","class":"OCA\\Mail\\Cache\\Cache","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"}}
{"reqId":"Y52BZoSreZp4UutncY76MgABRwQ","level":3,"time":"2022-12-17T08:44:31+00:00","remoteAddr":"112.202.200.25","user":"kugiigi","app":"PHP","method":"GET","url":"/index.php/apps/mail/api/messages?mailboxId=4&limit=20","message":"Undefined array key 262033 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#147","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36","version":"24.0.5.1","exception":{"Exception":"Error","Message":"Undefined array key 262033 at /var/www/nextcloud/apps/mail/lib/Cache/Cache.php#147","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/mail/lib/Cache/Cache.php","line":147,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"function":"save","class":"OCA\\Mail\\Cache\\Cache","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"}}

Maybe it’s the same issue as

??

Wow, this seems to have fixed the issue.
I’ll observe for now.

I wonder what happened though and if it’s possible that it’ll happen again.