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  1. ZABBIX BUGS AND ISSUES
  2. ZBX-4393

Zabbix_server ignores Timeout config option for snmp checks

    Details

    • Type: Incident report
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 1.8.8
    • Fix Version/s: 2.1.0
    • Component/s: Server (S)
    • Labels:
    • Environment:
      FreeBSD 8.2 RELEASE amd64, zabbix-server-1.8.8, net-snmp-5.7

      Description

      Looks like zabbix_server doesn't listen to Timeout config option for snmp checks on FreeBSD (Don't have Linux, can't check).

      Now I have Timeout=30, but I see zabbix log messages like:
      1749:20111125:172042.270 SNMP Host [spb9124-F1S2]: first network error, wait for 15 seconds
      1749:20111125:172043.271 SNMP Host [spb9124-F2S2]: first network error, wait for 15 seconds
      1754:20111125:172058.267 SNMP Host [spb9124-F1S2]: another network error, wait for 15 seconds

      Ok, let's do debug = 4.
      ...
      47693:20111123:111039.182 In get_values()
      47693:20111123:111039.182 In DCconfig_get_poller_items() poller_type:0
      47693:20111123:111039.182 End of DCconfig_get_poller_items():1
      47693:20111123:111039.182 In substitute_simple_macros() data:'snmp.cpu'
      47693:20111123:111039.182 In substitute_simple_macros() data:'iowa'
      47693:20111123:111039.182 In substitute_simple_macros() data:'CISCO-SYSTEM-EXT-MIB::cseSysCPUUtilization.0'
      47693:20111123:111039.182 In get_value() key:'snmp.cpu'
      47693:20111123:111039.182 In get_value_snmp() key:'snmp.cpu' oid:'CISCO-SYSTEM-EXT-MIB::cseSysCPUUtilization.0'
      47693:20111123:111039.182 In snmp_open_session()
      47693:20111123:111039.182 SNMP [iowa@192.168.9.42:161]
      47693:20111123:111039.183 End of snmp_open_session()
      47693:20111123:111039.183 Standard processing
      47693:20111123:111039.183 In snmp_normalize(oid:CISCO-SYSTEM-EXT-MIB::cseSysCPUUtilization.0)
      47693:20111123:111039.183 End of snmp_normalize():CISCO-SYSTEM-EXT-MIB::cseSysCPUUtilization.0
      47693:20111123:111039.183 In get_snmp(oid:CISCO-SYSTEM-EXT-MIB::cseSysCPUUtilization.0)
      47695:20111123:111039.199 In get_values()
      47695:20111123:111039.199 In DCconfig_get_poller_items() poller_type:0
      47695:20111123:111039.199 End of DCconfig_get_poller_items():0
      47695:20111123:111039.199 End of get_values()
      47695:20111123:111039.199 poller #3 spent 0.000112 seconds while updating 0 values
      47695:20111123:111039.199 In DCconfig_get_poller_nextcheck() poller_type:0
      47695:20111123:111039.199 End of DCconfig_get_poller_nextcheck():1322032240
      47695:20111123:111039.199 sleeping for 1 seconds
      ....
      47693:20111123:111040.185 End of get_snmp():NETWORK_ERROR
      47693:20111123:111040.185 In snmp_close_session()
      47693:20111123:111040.185 End of snmp_close_session()
      47693:20111123:111040.185 End of get_value_snmp():NETWORK_ERROR
      47693:20111123:111040.185 Item [spb9124-F1S1:snmp.cpu] error: Timeout while connecting to [192.168.9.42:161]
      47693:20111123:111040.185 In zabbix_log()
      47693:20111123:111040.185 In DCconfig_get_items() hostid:0 key:'zabbix[log]'
      47693:20111123:111040.185 End of DCconfig_get_items():0
      47693:20111123:111040.185 End of zabbix_log()
      47693:20111123:111040.186 End of get_value():NETWORK_ERROR
      47693:20111123:111040.186 query [txnlev:1] [begin;]
      47693:20111123:111040.186 query [txnlev:1] [update hosts set snmp_errors_from=1322032240,snmp_disable_until=1322032255 where hostid=10182]
      47693:20111123:111040.186 query [txnlev:1] [commit;]
      47693:20111123:111040.186 SNMP Host [spb9124-F1S1]: first network error, wait for 15 seconds
      .....
      About 1 second for timeout. Why?

      [root@octans ~]# tcpdump -N -i bce0 host 192.168.9.42
      ....
      17:25:39.675758 IP monitoring.59216 > spb9124-f1s1.snmp: C=iowa GetRequest(33) E:cisco.9.305.1.1.1.0
      17:25:39.850199 IP monitoring > spb9124-f1s1: ICMP echo request, id 15879, seq 1280, length 76
      17:25:39.850451 IP spb9124-f1s1 > monitoring: ICMP echo reply, id 15879, seq 1280, length 76
      17:25:40.050191 IP monitoring > spb9124-f1s1: ICMP echo request, id 15879, seq 1280, length 76
      17:25:40.050429 IP spb9124-f1s1 > monitoring: ICMP echo reply, id 15879, seq 1280, length 76
      17:25:40.251189 IP monitoring > spb9124-f1s1: ICMP echo request, id 15879, seq 1280, length 76
      17:25:40.251428 IP spb9124-f1s1 > monitoring: ICMP echo reply, id 15879, seq 1280, length 76
      17:25:40.452795 IP monitoring > spb9124-f1s1: ICMP echo request, id 15879, seq 1280, length 76
      17:25:40.453040 IP spb9124-f1s1 > monitoring: ICMP echo reply, id 15879, seq 1280, length 76
      17:25:40.651187 IP monitoring > spb9124-f1s1: ICMP echo request, id 15879, seq 1280, length 76
      17:25:40.651425 IP spb9124-f1s1 > monitoring: ICMP echo reply, id 15879, seq 1280, length 76
      17:25:40.692946 IP spb9124-f1s1.snmp > monitoring.59216: C=iowa GetResponse(34) E:cisco.9.305.1.1.1.0=0
      17:25:40.692963 IP monitoring > spb9124-f1s1: ICMP monitoring udp port 59216 unreachable, length 36
      ....

      About 1 second for waiting responce again. 1 second is default timeout parameter for net-snmp.

      So let's try net-snmp's snmpget - same tcpdump output.
      And this
      [root@octans ~]# time snmpget -c iowa -v1 192.168.9.42 1.3.6.1.4.1.9.9.305.1.1.1.0
      Timeout: No Response from 192.168.9.42.
      1.02s real 0.01s user 0.00s sys

      But if I set -t 30 all works good every time.
      [root@octans ~]# time snmpget -t 30 -c iowa -v1 192.168.9.42 1.3.6.1.4.1.9.9.305.1.1.1.0
      SNMPv2-SMI::enterprises.9.9.305.1.1.1.0 = Gauge32: 0
      1.60s real 0.02s user 0.00s sys

      P.S.
      [root@octans /usr/ports/net-mgmt/zabbix-server]# make showconfig
      ===> The following configuration options are available for zabbix-server-1.8.8,2:
      MYSQL=on "Use MySQL backend"
      PGSQL=off "Use PostgreSQL backend"
      SQLITE=off "Use SQLite backend"
      IPV6=on "Support for IPv6"
      FPING=on "Use fping for pinging hosts"
      JABBER=on "Support for jabber media type"
      CURL=on "Support web monitoring with cURL"
      LDAP=off "Support for checking LDAP servers"
      IPMI=on "Support for IPMI"
      SSH=on "Support for SSH-based checks"
      IODBC=off "Support for iODBC"
      UNIXODBC=off "Support for unixODBC"
      ===> Use 'make config' to modify these settings

      [root@octans /usr/ports/net-mgmt/net-snmp]# make showconfig
      ===> The following configuration options are available for net-snmp-5.7_5:
      IPV6=on "Build with IPv6 support"
      MFD_REWRITES=off "Build with 64-bit Interface Counters"
      PERL=on "Install additional perl modules"
      PERL_EMBEDDED=on "Build embedded perl"
      DUMMY=on "Enable dummy values as placeholders"
      TKMIB=off "Install graphical MIB browser"
      DMALLOC=off "Enable dmalloc debug memory allocator"
      UNPRIVILEGED=off "Allow unprivileged users to execute net-snmp"
      ===> Use 'make config' to modify these settings

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              • Assignee:
                Unassigned
                Reporter:
                mox1987 Pavel Timofeev
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                11 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: