[Samba] Failed to init inotify - Too many open files

[L.P.H. van Belle]

you can try : 
sysctl fs.inotify.max_user_instances=1536

if that does not work, try upgrading your kernel. 

Greetz, 

Louis



>-----Oorspronkelijk bericht-----
>Van: meike.stone at googlemail.com 
>[mailto:samba-bounces at lists.samba.org] Namens Meike Stone
>Verzonden: woensdag 10 juni 2015 15:47
>Aan: samba at lists.samba.org
>Onderwerp: [Samba] Failed to init inotify - Too many open files
>
>Hello,
>
>I've a problem on my system with inotify.
>
>In the smbd logfile are shown a lot messages like this:
>
>[2015/06/10 11:15:21.644453,  0, pid=57030, effective(12700, 100),
>real(0, 0)] smbd/notify_inotify.c:297(inotify_setup) Failed to init
>inotify - Too many open files
>[2015/06/10 11:15:23.968497,  0, pid=57030, effective(12700, 100),
>real(0, 0)] smbd/notify_inotify.c:297(inotify_setup) Failed to init
>inotify - Too many open files
>[2015/06/10 11:15:24.192444,  0, pid=57030, effective(12700, 100),
>real(0, 0)] smbd/notify_inotify.c:297(inotify_setup) Failed to init
>inotify - Too many open files
>[2015/06/10 11:15:28.616495,  0, pid=57030, effective(12700, 100),
>real(0, 0)] smbd/notify_inotify.c:297(inotify_setup) Failed to init
>inotify - Too many open files
>
>I can't find the reason, why smbd ist complaining. But in the 
>source code, I see
>
>    in->fd = inotify_init();
>    if (in->fd == -1) {
>        DEBUG(0,("Failed to init inotify - %s\n", strerror(errno)));
>        talloc_free(in);
>        return map_nt_error_from_unix(errno);
>    }
>
>it is nothing special from smbs/samba. But why the kernel 
>throws this message?
>
>Here a little bit about samba and the system:
>=============================================
>
>* The samba version is 3.6.25
>* Used by about 1000 users
>* Linux kernel 3.0.101-0.46 64bit (SLES11SP3)
>
>* Inotify configuration from system:
>  ----------------------------------
># sysctl -a | grep inotify
>fs.inotify.max_queued_events = 16384
>fs.inotify.max_user_instances = 128
>fs.inotify.max_user_watches = 65536
>
>
>* The samba config:
>-------------------
>
>[global]
>    workgroup = Samba
>    map to guest = Bad User
>    security = user
>    server string = FILESERVER
>
>    load printers = no
>    printcap name = /dev/null
>    disable spoolss = yes
>
>    ldap admin dn = uid=samba_admin,o=company,c=net
>    passdb backend = ldapsam:"ldap://ldap01.company.net
>ldap://ldap01.company.net"
>    ldap suffix = cn=samba,o=company,c=net
>    ldap user suffix = cn=accounts
>    ldap group suffix = cn=groups
>    ldap passwd sync = No
>
>    unix extensions = no
>    follow symlinks = yes
>    wide links = yes
>
>    vfs objects = extd_audit
>    debug uid = yes
>    debug pid = yes
>    debug class = yes
>    log level = 0 vfs:2
>    syslog = 0
>    max log size = 1024
>    log file = /var/log/smbduserlogs/%U.log
>
>[DATA]
>    path = /data
>    comment = share
>    writeable = yes
>    browseable = no
>    nt acl support = no
>    inherit permissions = yes
>    store dos attributes = yes
>
>
>
>* To check the system status regarding samba and inotify I let run
>   by cron following script at every 5 minutes
>------------------------------------------------------------------
>#!/bin/sh
>LOG_FILE="/tmp/inotify.log"
>d=$(date +"%c")
>echo -e "\n $d ===================" >>$LOG_FILE
>find /proc/*/fd/* -type l -lname 'anon_inode:inotify' 2>/dev/null |
>cut -f 1-3 -d'/' | uniq -c | sort -n >>$LOG_FILE
>ps -eLf >>$LOG_FILE
>smbstatus >>$LOG_FILE
>
>I never got processes with more then 10 inotify file descriptors ..
>
>
>If I look to the limits from a "complaining processes" I see 
>nothing "wrong":
># cat /proc/57030/limits
>Limit                     Soft Limit           Hard Limit      
>     Units
>Max cpu time              unlimited            unlimited       
>     seconds
>Max file size             unlimited            unlimited       
>     bytes
>Max data size             unlimited            unlimited       
>     bytes
>Max stack size            8388608              unlimited       
>     bytes
>Max core file size        16777216             unlimited       
>     bytes
>Max resident set          57507328000          unlimited       
>     bytes
>Max processes             516081               516081          
>     processes
>Max open files            16404                16404           
>     files
>Max locked memory         65536                262144          
>     bytes
>Max address space         57559531520          unlimited       
>     bytes
>Max file locks            unlimited            unlimited       
>     locks
>Max pending signals       516081               516081          
>     signals
>Max msgqueue size         819200               819200          
>     bytes
>Max nice priority         0                    0
>Max realtime priority     0                    0
>Max realtime timeout      unlimited            unlimited            us
>
>
>Tracing the syscall inotify_init() via ftrace is not possible, because
>the kernel
>was not compiled with CONFIG_FUNCTION_TRACER.
>
>
>Can anyone help me?
>
>
>Thanks Meike
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