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simon_irwin_849's avatar
Icon for Nimbostratus rankNimbostratus
Oct 27, 2010

High Speed Logging service requires restart

This is not strictly an iRules topic, but relates to HSL used within an iRule.



Is there a TMSH (or any other) command to restart HSL? Is it controlled by a particular service?


8 Replies

  • Hi Simon,



    I think HSL processing is within TMM, so you'd need to restart TMM or all services. What's the issue you're trying to address?



  • Is this still the only way to restart HSL? Has this been changed in V11? It would be a pity to bring everything down (or perform a fail-over) to restart one service....
  • what's the issue you are having?



    this is a bug about HSL i've found. not sure if it's what you are experiencing.



    Bug 343642 - HSL: B/W tracking apparently fails to recover from transient loss of all pool members.


    Bug 343642 is fixed in 10.2.2 and 11.0.0.
  • I restarted our Syslog server, and HSL hasn't logged since. I'm about to go restart TMM.
  • are you using tcp?


    what is software unit is running? is it 10.2.2?
  • i run nc -l -u -p 514 as syslog server.

    i was able to receive hsl log after ctrl+c and run nc again.

    [root@Edelweiss:Active] config  b version|grep -iA 1 version
    BIG-IP Version 10.2.0 1707.0
    Final Edition
    [root@Edelweiss:Active] config  b virtual bar list
    virtual bar {
       snat automap
       pool foo
       ip protocol tcp
       rules myrule
       profiles {
          http {}
          tcp {}
    [root@Edelweiss:Active] config  b rule myrule list
    rule myrule {
       when CLIENT_ACCEPTED {
       set hsl [HSL::open -proto UDP -pool syslogp]
    when HTTP_REQUEST {
        Log HTTP request as; see RFC 3164 Section 4.1.1 - "PRI Part" for more info
       HSL::send $hsl "<190>[clock format [clock seconds] -gmt 8] [IP::local_addr] [HTTP::uri]"
    [root@Edelweiss:Active] config  b pool syslogp list
    pool syslogp {
       members {}
  • Hamish's avatar
    Icon for Cirrocumulus rankCirrocumulus
    You might want to update to something later than 10.2.0. I had similar problems with HSL last year... Later is better...



    HSL with tcp has it's own set of challenges BTW... I had to do a 'bigstart restart tmm' quite a few times when stress testing. That's the only way to get it to work again IIRC...