Zabbix Agent Memory Leak

[G10h4ck]

Hi all!

I am trying zabbix as monitoring system on our community network in Italy ( ninux.org )

I am experiencing a big problem with the agent, our devices are embedded system with openwrt and ~16MB of ram so a have noticed rapidly of a memory leak on latest version of zabbix_agentd

as you can see here http://eigenlab.org/~gioacchino/Imma...emory_leak.png

the free memory on the device is slowly decreasing after starting zabbix agentd end grow up instantly when /etc/init.d/zabbix_agentd restart is runned

here more infos:

root@OpenWrt:~# zabbix_agentd -V
Zabbix Agent (daemon) v1.8.11 (revision 26205) (20 March 2012)
Compilation time: Apr  5 2012 15:56:04



root@OpenWrt:~# ps ax
  PID USER       VSZ STAT COMMAND
    1 root      1384 S    init       
    2 root         0 SW   [kthreadd]
    3 root         0 SW   [ksoftirqd/0]
    4 root         0 SW   [events/0]
    5 root         0 SW   [khelper]
    8 root         0 SW   [async/mgr]
   39 root         0 SW   [sync_supers]
   41 root         0 SW   [bdi-default]
   43 root         0 SW   [kblockd/0]
   71 root         0 SW   [kswapd0]
   72 root         0 SW   [aio/0]
   73 root         0 SW   [crypto/0]
   85 root         0 SW   [mtdblockd]
   91 root         0 SW   [ar71xx-spi]
  225 root         0 SW   [ipolldevd]
  278 root         0 SWN  [jffs2_gcd_mtd4]
  293 root      1376 S    /bin/sh /etc/init.d/rcS S boot 
  294 root      1384 S    init       
  296 root      1376 S    logger -s -p 6 -t sysinit 
  308 root      1388 S    syslogd -C16 
  310 root      1368 S    klogd 
  324 root       780 S    /sbin/hotplug2 --override --persistent --set-worker /
  432 root         0 SW   [events_nrt]
  434 root         0 SW   [cfg80211]
  441 root         0 SW   [khubd]
  511 root         0 SW   [phy0]
  561 root         0 SW   [bat_events]
  670 root      1456 S    hostapd -P /var/run/wifi-phy0.pid -B /var/run/hostapd
  848 root      1132 S    /usr/sbin/dropbear -P /var/run/dropbear.1.pid -s -p 2
  858 root       800 S    /usr/bin/mini_snmpd -c public -i br-clients,wlan0-1 -
  900 root      1380 S    watchdog -t 5 /dev/watchdog 
 1424 root      1380 S    /usr/sbin/ntpd -n -p 0.openwrt.pool.ntp.org -p 1.open
 5043 zabbix    1584 S    /usr/sbin/zabbix_agentd 
 5044 zabbix    1584 S    /usr/sbin/zabbix_agentd 
 5045 zabbix    1844 S    /usr/sbin/zabbix_agentd   <--- JUST AFTER SOME MINUTER FROM RESTART
 5046 zabbix    1592 S    /usr/sbin/zabbix_agentd 
 5084 root      1204 S    /usr/sbin/dropbear -P /var/run/dropbear.1.pid -s -p 2
 5085 root      1388 S    -ash 
 5140 root      1376 R    ps ax




root@OpenWrt:~# cat /etc/zabbix/zabbix_agentd.conf 
# This is config file for zabbix_agentd
# To get more information about ZABBIX, go http://www.zabbix.com

############ GENERAL PARAMETERS #################

# List of comma delimited IP addresses (or hostnames) of ZABBIX servers. 
# No spaces allowed. First entry is used for sending active checks.
# Note that hostnames must resolve hostname->IP address and
# IP address->hostname.

Server=zabbix.eigenlab.org

# Server port for sending active checks

#ServerPort=10051

# Unique hostname. Required for active checks.

Hostname=localhost

# Listen port. Default is 10050

#ListenPort=10050

# IP address to bind agent
# If missing, bind to all available IPs

#ListenIP=127.0.0.1

# Number of pre-forked instances of zabbix_agentd.
# Default value is 5
# This parameter must be between 1 and 16

StartAgents=1

# How often refresh list of active checks. 2 minutes by default.

#RefreshActiveChecks=120

# Disable active checks. The agent will work in passive mode listening server.

#DisableActive=1

# Enable remote commands for ZABBIX agent. By default remote commands disabled.

#EnableRemoteCommands=1

# Specifies debug level
# 0 - debug is not created
# 1 - critical information
# 2 - error information
# 3 - warnings
# 4 - information (default)
# 5 - for debugging (produces lots of information)

DebugLevel=3

# Name of PID file

PidFile=/var/run/zabbix/zabbix_agentd.pid

# Name of log file.
# If not set, syslog will be used

LogFile=/var/log/zabbix/zabbix_agentd.log

# Spend no more than Timeout seconds on processing
# Must be between 1 and 30

Timeout=3

####### USER-DEFINED MONITORED PARAMETERS #######
# Format: UserParameter=<key>,<shell command>
# Note that shell command must not return empty string or EOL only
#UserParameter=system.test,who|wc -l
### Set of parameter for monitoring MySQL server (v3.23.42 and later)
### Change -u<username> and add -p<password> if required
#UserParameter=mysql.ping,mysqladmin -uroot ping|grep alive|wc -l
#UserParameter=mysql.uptime,mysqladmin -uroot status|cut -f2 -d":"|cut -f1 -d"T"
#UserParameter=mysql.threads,mysqladmin -uroot status|cut -f3 -d":"|cut -f1 -d"Q"
#UserParameter=mysql.questions,mysqladmin -uroot status|cut -f4 -d":"|cut -f1 -d"S"
#UserParameter=mysql.slowqueries,mysqladmin -uroot status|cut -f5 -d":"|cut -f1 -d"O"
#UserParameter=mysql.qps,mysqladmin -uroot status|cut -f9 -d":"
#UserParameter=mysql.version,mysql -V

I am trying to run zabbix_agentd under valgrind on my workstation, but i didn't find a way to make it not detach

Any helps would be very appreciated!!

[richlv]

could you please report this in the zabbix issue tracker at https://support.zabbix.com ?
thanks

btw, your agent config file is quite old (not causing any memleaks, hopefully ) - grabbing the one from 1.8.11 archive would be suggested

[G10h4ck]

reported here https://support.zabbix.com/browse/ZBX-4848