gistfile1.txt

We are using latest collectd and the plugin SNMP but we are facing an issue.
When a network switch device is not responsing, a segfault event is raised and collectd daemon gets killed.

Through the use of { snmp_gets }, we get the following:
snmpwalk -v 2c -c comstrg swicth IF-MIB::ifInOctets
Timeout: No Response from switch

This same switch configured in collectd fires a timeout (as a collectd error and a segfault event) even though it is the only device configured in collectd configuration file.

Here is some stacktrace:

[2014-11-13 15:55:01] snmp plugin: host esomehost: snmp_sess_synch_response failed: Timeout
Nov 13 15:55:01 machine kernel: collectd[41452]: segfault at 18 ip 000000363b075fb3 sp 00007f4cb1602580 error 4 in libc-2.12.so[363b000000+18a000]

We're using : CentOS 6.6

Collectd commit : ec0e109

./configure --prefix=/usr/local/monitoring/snmp --disable-apple_sensors --disable-aquaero --disable-mic --disable-netapp --disable-nut --disable-lpar --disable-oracle --disable-pf --disable-onewire --disable-redis --disable-routeros --disable-tokyotyrant --disable-tape --disable-sigrok --disable-write_mongodb --disable-write_redis --disable-zfs_arc --disable-xmms --disable-rrdcached --disable-pinba --disable-modbus --disable-gmond --disable-libvirt --disable-java  --disable-madwifi --disable-wireless --disable-olsrd --disable-teamspeak2 --enable-write_riemann --disable-amqp --enable-snmp --enable-write_graphite--disable-perl

Configurations :

###############
collectd.conf
###############

Hostname         "SNMP"
#FQDNLookup   true                                                                                       
BaseDir     "/usr/local/monitoring/snmp/var/lib/collectd"
PIDFile     "/usr/local/monitoring/snmp/var/run/collectd-snmp.pid"
PluginDir   "/usr/local/monitoring/snmp/lib/collectd"
TypesDB     "/usr/local/monitoring/snmp/share/collectd/types.db"

Interval 300 # 20
readthreads 10
writethreads 10

#Timeout 2 # 5
# Log file support
LoadPlugin "logfile"
<Plugin "logfile">
    LogLevel "debug"
    File "/var/log/collectd-snmp.log"
    Timestamp true
</Plugin>

# System logging
LoadPlugin "syslog"
<Plugin syslog>
        LogLevel "info"
        NotifyLevel "OKAY"
</Plugin> # END_OF_SYSLOG

LoadPlugin "write_graphite"
<Plugin write_graphite>
    <Carbon>
        Host "carbon2.somefqdn"
        Port "2003"
        Protocol "tcp"
        Prefix "collectd."
        AlwaysAppendDS false
        SeparateInstances false
        EscapeCharacter "_"
    </Carbon>
</Plugin>

LoadPlugin "write_riemann"
<Plugin "write_riemann">
    <Node "kiss">
        Host "fqdn"
        Port "5555"
        Protocol UDP
        StoreRates true
        AlwaysAppendDS false
        TTLFactor 2.0
    </Node>
    Tag "riemann"
</Plugin>


<Include "/usr/local/monitoring/snmp/etc/collectd.d/">
    Filter "*.conf"
</Include>

##########
snmp.conf
##########

LoadPlugin snmp
<Plugin snmp>

  <Data "uptime">
    Type "uptime"
    Table false
    Instance ""
    Scale 0.01
    Values  "DISMAN-EVENT-MIB::sysUpTimeInstance"
  </Data>

  <Data "memory_free">
    Type "memory_free"
    Table true
    Instance "CISCO-MEMORY-POOL-MIB::ciscoMemoryPoolName"
    Values  "CISCO-MEMORY-POOL-MIB::ciscoMemoryPoolFree"
  </Data>

  <Data "memory_used">
    Type "memory_used"
    Table true
    Instance "CISCO-MEMORY-POOL-MIB::ciscoMemoryPoolName"
    Values "CISCO-MEMORY-POOL-MIB::ciscoMemoryPoolUsed" 
  </Data>

  <Data "CPU_usage">
    Type "percent"
    Table false
    Instance "cpmCPUTotalMonIntervalValue"
    Values "CISCO-PROCESS-MIB::cpmCPUTotalMonIntervalValue.1"
  </Data>

  <Data "std_traffic">
    Type "if_octets"
    Table true
    Instance "IF-MIB::ifDescr"
    Values "IF-MIB::ifInOctets" "IF-MIB::ifOutOctets"
  </Data>

  <Host "some.fqdn.net">
    Address "x.x.x.x"
    Version 2
    Community "Readonlypassword"
    Collect "memory_free" "memory_used" "std_traffic" "uptime"
#    Interval 300
  </Host> 

</Plugin>

######################################

Thanks for your support