InnoDB and [authz_host:error] error logs

How can fix this?

InnoDB: innodb_empty_free_list_algorithm has been changed to legacy because of small buffer pool size. In order to use backoff, increase buffer pool at least up to 20MB.

and the [authz_host:error] ?

thanks

NextCloudPi diagnostics

NextCloudPi version  v1.3.6
NextCloudPi image    NextCloudPi_01-12-19
distribution         Debian GNU/Linux 9 \n \l
automount            yes
USB devices          sda 
datadir              /media/DATAcloud/ncdata
data in SD           no
data filesystem      btrfs
data disk usage      303G/3.7T
rootfs usage         3.8G/30G
swapfile             /var/swap
dbdir                /var/lib/mysql
Nextcloud check      ok
Nextcloud version    15.0.2.0
HTTPD service        up
PHP service          up
MariaDB service      up
Redis service        up
Postfix service      up
internet check       ok
port check 80        open
port check 443       open
IP                   ***REMOVED SENSITIVE VALUE***
gateway              ***REMOVED SENSITIVE VALUE***
interface            enx001e0632be42
certificates         ***REMOVED SENSITIVE VALUE***
NAT loopback         no
uptime               21min

Nextcloud configuration

{
    "system": {
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": {
            "0": "localhost",
            "5": "nextcloudpi.local",
            "7": "nextcloudpi",
            "8": "nextcloudpi.lan",
            "1": "192.168.0.9",
            "4": "robserver.mycloud.bz",
            "3": "robserver.mycloud.bz"
        },
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "15.0.2.0",
        "overwrite.cli.url": "https:\/\/robserver.mycloud.bz\/",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "memcache.local": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0,
            "timeout": 0,
            "password": "***REMOVED SENSITIVE VALUE***"
        },
        "tempdirectory": "\/media\/DATAcloud\/ncdata\/tmp",
        "mail_smtpmode": "smtp",
        "mail_smtpauthtype": "LOGIN",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "overwriteprotocol": "https",
        "loglevel": "2",
        "log_type": "file",
        "maintenance": false,
        "logfile": "\/media\/DATAcloud\/ncdata\/nextcloud.log",
        "mail_sendmailmode": "smtp",
        "mail_smtpsecure": "tls",
        "mail_smtpauth": 1,
        "mail_smtpport": "587",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "htaccess.RewriteBase": "\/"
    }
}

HTTPd logs

[Thu Jan 17 20:47:01.108359 2019] [authz_host:error] [pid 1583:tid 2791826480] [client 192.168.0.101:64932] AH01753: access check of 'localhost' to /img/reboot.svg failed, reason: unable to get the remote host name
[Thu Jan 17 20:47:01.119999 2019] [authz_host:error] [pid 1583:tid 2758239280] [client 192.168.0.101:64932] AH01753: access check of 'localhost' to /img/defaults.svg failed, reason: unable to get the remote host name
[Thu Jan 17 20:47:01.123966 2019] [authz_host:error] [pid 1583:tid 2775032880] [client 192.168.0.101:64932] AH01753: access check of 'localhost' to /img/search.svg failed, reason: unable to get the remote host name, referer: https://192.168.0.9:4443/css/ncp.css
[Thu Jan 17 20:47:01.173129 2019] [authz_host:error] [pid 1583:tid 2775032880] [client 192.168.0.101:64932] AH01753: access check of 'localhost' to /img/nc-button.svg failed, reason: unable to get the remote host name, referer: https://192.168.0.9:4443/css/ncp.css
[Thu Jan 17 20:47:01.175016 2019] [authz_host:error] [pid 1583:tid 2775032880] [client 192.168.0.101:64932] AH01753: access check of 'localhost' to /img/dashboard.svg failed, reason: unable to get the remote host name, referer: https://192.168.0.9:4443/css/ncp.css
[Thu Jan 17 20:47:01.178487 2019] [authz_host:error] [pid 1583:tid 2758239280] [client 192.168.0.101:64932] AH01753: access check of 'localhost' to /img/wizard.svg failed, reason: unable to get the remote host name, referer: https://192.168.0.9:4443/css/ncp.css
[Thu Jan 17 20:47:01.178516 2019] [authz_host:error] [pid 1583:tid 2775032880] [client 192.168.0.101:64932] AH01753: access check of 'localhost' to /img/settings-white.svg failed, reason: unable to get the remote host name, referer: https://192.168.0.9:4443/css/ncp.css
[Thu Jan 17 20:47:01.183520 2019] [authz_host:error] [pid 1583:tid 2775032880] [client 192.168.0.101:64932] AH01753: access check of 'localhost' to /img/info-white.svg failed, reason: unable to get the remote host name, referer: https://192.168.0.9:4443/css/ncp.css
[Thu Jan 17 20:47:01.185327 2019] [authz_host:error] [pid 1583:tid 2775032880] [client 192.168.0.101:64932] AH01753: access check of 'localhost' to /img/files.svg failed, reason: unable to get the remote host name, referer: https://192.168.0.9:4443/css/ncp.css
[Thu Jan 17 20:47:01.185328 2019] [authz_host:error] [pid 1583:tid 2758239280] [client 192.168.0.101:64932] AH01753: access check of 'localhost' to /img/menu.svg failed, reason: unable to get the remote host name, referer: https://192.168.0.9:4443/css/ncp.css
[Thu Jan 17 20:47:01.274542 2019] [authz_host:error] [pid 1583:tid 2758239280] [client 192.168.0.101:64932] AH01753: access check of 'localhost' to /ncp-launcher.php failed, reason: unable to get the remote host name
[Thu Jan 17 20:47:01.317251 2019] [authz_host:error] [pid 1583:tid 2775032880] [client 192.168.0.101:64932] AH01753: access check of 'localhost' to /ncp-output.php failed, reason: unable to get the remote host name
[Thu Jan 17 20:47:06.276190 2019] [authz_host:error] [pid 1583:tid 2758239280] [client 192.168.0.101:64932] AH01753: access check of 'localhost' to /ncp-launcher.php failed, reason: unable to get the remote host name
[Thu Jan 17 21:04:52.208880 2019] [authz_host:error] [pid 1583:tid 2758239280] [client 192.168.0.101:64932] AH01753: access check of 'localhost' to /img/info.svg failed, reason: unable to get the remote host name, referer: https://192.168.0.9:4443/css/ncp.css
[Thu Jan 17 21:04:52.208880 2019] [authz_host:error] [pid 1583:tid 2791826480] [client 192.168.0.101:64932] AH01753: access check of 'localhost' to /img/red-circle.svg failed, reason: unable to get the remote host name, referer: https://192.168.0.9:4443/css/ncp.css
[Thu Jan 17 21:04:53.567797 2019] [authz_host:error] [pid 1583:tid 2791826480] [client 192.168.0.101:64932] AH01753: access check of 'localhost' to /ncp-launcher.php failed, reason: unable to get the remote host name
[Thu Jan 17 21:05:35.996384 2019] [authz_host:error] [pid 1583:tid 2791826480] [client 192.168.0.101:64932] AH01753: access check of 'localhost' to /ncp-launcher.php failed, reason: unable to get the remote host name
[Thu Jan 17 21:05:35.996401 2019] [authz_host:error] [pid 1583:tid 2758239280] [client 192.168.0.101:64932] AH01753: access check of 'localhost' to /img/green-circle.svg failed, reason: unable to get the remote host name, referer: https://192.168.0.9:4443/css/ncp.css
[Thu Jan 17 21:05:42.624025 2019] [authz_host:error] [pid 1583:tid 2791826480] [client 192.168.0.101:64932] AH01753: access check of 'localhost' to /ncp-launcher.php failed, reason: unable to get the remote host name
[Thu Jan 17 21:05:44.465318 2019] [authz_host:error] [pid 1583:tid 2791826480] [client 192.168.0.101:64932] AH01753: access check of 'localhost' to /ncp-launcher.php failed, reason: unable to get the remote host name

Database logs

2019-01-17 20:45:25 3063959552 [Note] InnoDB: innodb_empty_free_list_algorithm has been changed to legacy because of small buffer pool size. In order to use backoff, increase buffer pool at least up to 20MB.

2019-01-17 20:45:25 3063959552 [Note] InnoDB: Using mutexes to ref count buffer pool pages
2019-01-17 20:45:25 3063959552 [Note] InnoDB: The InnoDB memory heap is disabled
2019-01-17 20:45:25 3063959552 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2019-01-17 20:45:25 3063959552 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2019-01-17 20:45:25 3063959552 [Note] InnoDB: Compressed tables use zlib 1.2.8
2019-01-17 20:45:25 3063959552 [Note] InnoDB: Using Linux native AIO
2019-01-17 20:45:25 3063959552 [Note] InnoDB: Using generic crc32 instructions
2019-01-17 20:45:25 3063959552 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2019-01-17 20:45:25 3063959552 [Note] InnoDB: Completed initialization of buffer pool
2019-01-17 20:45:25 3063959552 [Note] InnoDB: Highest supported file format is Barracuda.
2019-01-17 20:45:27 3063959552 [Note] InnoDB: 128 rollback segment(s) are active.
2019-01-17 20:45:27 3063959552 [Note] InnoDB: Waiting for purge to start
2019-01-17 20:45:27 3063959552 [Note] InnoDB:  Percona XtraDB (http://www.percona.com) 5.6.41-84.1 started; log sequence number 93574911
2019-01-17 20:45:29 2483024704 [Note] InnoDB: Dumping buffer pool(s) not yet started
2019-01-17 20:45:29 3063959552 [Note] Plugin 'FEEDBACK' is disabled.
2019-01-17 20:45:31 3063959552 [Note] Server socket created on IP: '127.0.0.1'.
2019-01-17 20:45:31 3063959552 [Note] /usr/sbin/mysqld: ready for connections.
Version: '10.1.37-MariaDB-0+deb9u1'  socket: '/var/run/mysqld/mysqld.sock'  port: 3306  Debian 9.6

Nextcloud logs

{"reqId":"XD3ktn8AAQEAAAXgJHwAAAYW","level":2,"time":"2019-01-15T13:48:38+00:00","remoteAddr":"192.168.0.254","user":"--","app":"core","method":"POST","url":"\/index.php\/login","message":"Login failed: 'rob' (Remote IP: '192.168.0.254')","userAgent":"Mozilla\/5.0 (X11; Linux i686) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/71.0.3578.76 Safari\/537.36","version":"15.0.2.0"}
{"reqId":"XD3k0X8AAQEAAAXhSmEAAE4K","level":2,"time":"2019-01-15T13:49:06+00:00","remoteAddr":"192.168.0.254","user":"--","app":"core","method":"POST","url":"\/index.php\/login?user=rob","message":"Login failed: 'rob' (Remote IP: '192.168.0.254')","userAgent":"Mozilla\/5.0 (X11; Linux i686) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/71.0.3578.76 Safari\/537.36","version":"15.0.2.0"}
{"reqId":"XD3k8H8AAQEAAAXhSmIAAE8K","level":2,"time":"2019-01-15T13:49:37+00:00","remoteAddr":"192.168.0.254","user":"--","app":"core","method":"POST","url":"\/index.php\/login?user=rob","message":"Login failed: 'rob' (Remote IP: '192.168.0.254')","userAgent":"Mozilla\/5.0 (X11; Linux i686) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/71.0.3578.76 Safari\/537.36","version":"15.0.2.0"}
{"reqId":"XD3uP38AAQEAAD2xA4wAAAEA","level":2,"time":"2019-01-15T14:29:19+00:00","remoteAddr":"192.168.0.254","user":"rob","app":"core","method":"GET","url":"\/index.php\/login","message":"Login failed: 'rob' (Remote IP: '192.168.0.254')","userAgent":"Mozilla\/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/70.0.3538.5 Safari\/537.36","version":"15.0.2.0"}
{"reqId":"XD34RX8AAQEAAAWT7cUAAAAO","level":2,"time":"2019-01-15T15:12:05+00:00","remoteAddr":"37.171.137.135","user":"--","app":"core","method":"GET","url":"\/index.php\/avatar\/rob\/384","message":"Login failed: 'rob' (Remote IP: '37.171.137.135')","userAgent":"Mozilla\/5.0 (Android) ownCloud-android\/3.4.1","version":"15.0.2.0"}
{"reqId":"XD34RX8AAQEAAAWT7cUAAAAP","level":2,"time":"2019-01-15T15:12:05+00:00","remoteAddr":"37.171.137.135","user":"--","app":"core","method":"GET","url":"\/ocs\/v1.php\/cloud\/users\/rob?format=json","message":"Login failed: 'rob' (Remote IP: '37.171.137.135')","userAgent":"Mozilla\/5.0 (Android) ownCloud-android\/3.4.1","version":"15.0.2.0"}
{"reqId":"XD34RX8AAQEAAAWU470AAABQ","level":2,"time":"2019-01-15T15:12:05+00:00","remoteAddr":"37.171.137.135","user":"--","app":"core","method":"GET","url":"\/ocs\/v1.php\/cloud\/users\/rob?format=json","message":"Login failed: 'rob' (Remote IP: '37.171.137.135')","userAgent":"Mozilla\/5.0 (Android) ownCloud-android\/3.4.1","version":"15.0.2.0"}
{"reqId":"XD34SH8AAQEAAAWT7cYAAAAR","level":2,"time":"2019-01-15T15:12:09+00:00","remoteAddr":"37.171.137.135","user":"--","app":"core","method":"GET","url":"\/ocs\/v1.php\/cloud\/users\/rob?format=json","message":"Login failed: 'rob' (Remote IP: '37.171.137.135')","userAgent":"Mozilla\/5.0 (Android) ownCloud-android\/3.4.1","version":"15.0.2.0"}
{"reqId":"XD34Sn8AAQEAAAWT7cgAAAAM","level":2,"time":"2019-01-15T15:12:12+00:00","remoteAddr":"37.171.137.135","user":"--","app":"core","method":"GET","url":"\/ocs\/v1.php\/cloud\/capabilities?format=json","message":"Login failed: 'rob' (Remote IP: '37.171.137.135')","userAgent":"Mozilla\/5.0 (Android) ownCloud-android\/3.4.1","version":"15.0.2.0"}
{"reqId":"XD34TH8AAQEAAAWT7ckAAAAT","level":2,"time":"2019-01-15T15:12:15+00:00","remoteAddr":"37.171.137.135","user":"--","app":"core","method":"GET","url":"\/ocs\/v1.php\/cloud\/user?format=json","message":"Login failed: 'rob' (Remote IP: '37.171.137.135')","userAgent":"Mozilla\/5.0 (Android) ownCloud-android\/3.4.1","version":"15.0.2.0"}
{"reqId":"XD34638AAQEAAAWT7ekAAAAD","level":3,"time":"2019-01-15T15:14:52+00:00","remoteAddr":"192.168.0.254","user":"rob","app":"no app in context","method":"PUT","url":"\/remote.php\/dav\/files\/rob\/Disroot\/d\/KK\/6T5RZAFCQGXTCVPY24MYP5P64SKUJB\/ADGH2JR3N2PMRQANKOYNQQLD6BLXL3U5X45SGQPVEHLJWO45TZDA====","message":{"Exception":"OCP\\Lock\\LockedException","Message":"\"files\/5efcc89ce700bbf351bd2b36b79995bf\" is locked, existing lock on file: none","Code":0,"Trace":[{"file":"\/var\/www\/nextcloud\/lib\/private\/Files\/Storage\/Common.php","line":778,"function":"changeLock","class":"OC\\Lock\\MemcacheLockingProvider","type":"->","args":["files\/5efcc89ce700bbf351bd2b36b79995bf",2]},{"file":"\/var\/www\/nextcloud\/lib\/private\/Files\/Storage\/Wrapper\/Wrapper.php","line":615,"function":"changeLock","class":"OC\\Files\\Storage\\Common","type":"->","args":["files\/Disroot\/d\/KK\/6T5RZAFCQGXTCVPY24MYP5P64SKUJB\/ADGH2JR3N2PMRQANKOYNQQLD6BLXL3U5X45SGQPVEHLJWO45TZDA====",2,{"__class__":"OC\\Lock\\MemcacheLockingProvider"}]},{"file":"\/var\/www\/nextcloud\/lib\/private\/Files\/View.php","line":1964,"function":"changeLock","class":"OC\\Files\\Storage\\Wrapper\\Wrapper","type":"->","args":["files\/Disroot\/d\/KK\/6T5RZAFCQGXTCVPY24MYP5P64SKUJB\/ADGH2JR3N2PMRQANKOYNQQLD6BLXL3U5X45SGQPVEHLJWO45TZDA====",2,{"__class__":"OC\\Lock\\MemcacheLockingProvider"}]},{"file":"\/var\/www\/nextcloud\/apps\/dav\/lib\/Connector\/Sabre\/Node.php","line":359,"function":"changeLock","class":"OC\\Files\\View","type":"->","args":["\/Disroot\/d\/KK\/6T5RZAFCQGXTCVPY24MYP5P64SKUJB\/ADGH2JR3N2PMRQANKOYNQQLD6BLXL3U5X45SGQPVEHLJWO45TZDA====",2]},{"file":"\/var\/www\/nextcloud\/apps\/dav\/lib\/Connector\/Sabre\/File.php","line":219,"function":"changeLock","class":"OCA\\DAV\\Connector\\Sabre\\Node","type":"->","args":[2]},{"file":"\/var\/www\/nextcloud\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php","line":1130,"function":"put","class":"OCA\\DAV\\Connector\\Sabre\\File","type":"->","args":[null]},{"file":"\/var\/www\/nextcloud\/3rdparty\/sabre\/dav\/lib\/DAV\/CorePlugin.php","line":513,"function":"updateFile","class":"Sabre\\DAV\\Server","type":"->","args":["files\/rob\/Disroot\/d\/KK\/6T5RZAFCQGXTCVPY24MYP5P64SKUJB\/ADGH2JR3N2PMRQANKOYNQQLD6BLXL3U5X45SGQPVEHLJWO45TZDA====",null,null]},{"function":"httpPut","class":"Sabre\\DAV\\CorePlugin","type":"->","args":[{"absoluteUrl":"https:\/\/robserver.mycloud.bz\/remote.php\/dav\/files\/rob\/Disroot\/d\/KK\/6T5RZAFCQGXTCVPY24MYP5P64SKUJB\/ADGH2JR3N2PMRQANKOYNQQLD6BLXL3U5X45SGQPVEHLJWO45TZDA====","__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"\/var\/www\/nextcloud\/3rdparty\/sabre\/event\/lib\/EventEmitterTrait.php","line":105,"function":"call_user_func_array","args":[[{"__class__":"Sabre\\DAV\\CorePlugin"},"httpPut"],[{"absoluteUrl":"https:\/\/robserver.mycloud.bz\/remote.php\/dav\/files\/rob\/Disroot\/d\/KK\/6T5RZAFCQGXTCVPY24MYP5P64SKUJB\/ADGH2JR3N2PMRQANKOYNQQLD6BLXL3U5X45SGQPVEHLJWO45TZDA====","__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]]},{"file":"\/var\/www\/nextcloud\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php","line":479,"function":"emit","class":"Sabre\\Event\\EventEmitter","type":"->","args":["method:PUT",[{"absoluteUrl":"https:\/\/robserver.mycloud.bz\/remote.php\/dav\/files\/rob\/Disroot\/d\/KK\/6T5RZAFCQGXTCVPY24MYP5P64SKUJB\/ADGH2JR3N2PMRQANKOYNQQLD6BLXL3U5X45SGQPVEHLJWO45TZDA====","__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]]},{"file":"\/var\/www\/nextcloud\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php","line":254,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->","args":[{"absoluteUrl":"https:\/\/robserver.mycloud.bz\/remote.php\/dav\/files\/rob\/Disroot\/d\/KK\/6T5RZAFCQGXTCVPY24MYP5P64SKUJB\/ADGH2JR3N2PMRQANKOYNQQLD6BLXL3U5X45SGQPVEHLJWO45TZDA====","__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"\/var\/www\/nextcloud\/apps\/dav\/lib\/Server.php","line":301,"function":"exec","class":"Sabre\\DAV\\Server","type":"->","args":[]},{"file":"\/var\/www\/nextcloud\/apps\/dav\/appinfo\/v2\/remote.php","line":35,"function":"exec","class":"OCA\\DAV\\Server","type":"->","args":[]},{"file":"\/var\/www\/nextcloud\/remote.php","line":163,"args":["\/var\/www\/nextcloud\/apps\/dav\/appinfo\/v2\/remote.php"],"function":"require_once"}],"File":"\/var\/www\/nextcloud\/lib\/private\/Lock\/MemcacheLockingProvider.php","Line":129,"CustomMessage":"--"},"userAgent":"Mozilla\/5.0 (Macintosh) mirall\/2.5.1final (build 20181204) (Nextcloud)","version":"15.0.2.0"}
{"reqId":"XD36jH8AAQEAAAWT8DoAAAAQ","level":3,"time":"2019-01-15T15:21:48+00:00","remoteAddr":"192.168.0.254","user":"rob","app":"PHP","method":"POST","url":"\/index.php\/apps\/ocsms\/set\/country","message":"call_user_func() expects parameter 1 to be a valid callback, class 'OCA\\OcSms\\Db\\Config' not found at \/var\/www\/nextcloud\/lib\/public\/AppFramework\/Db\/Mapper.php#329","userAgent":"Mozilla\/5.0 (Macintosh; Intel Mac OS X 10.13; rv:60.0) Gecko\/20100101 Firefox\/60.0","version":"15.0.2.0"}
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