varnishlog 2.1.5 record limit

Thiago Figueiro TFigueiro at
Thu Feb 23 05:21:40 CET 2012

I'm using varnishlog (2.1.5) to help diagnose a production issue.  Specifically, I want to see the Cookie header from the client request:

   76 RxHeader     c Cookie: __utmc=54987508; 90374957_clogin=l=1329292359&v=1&e=1329294317271; s_cc=true
; s_sq=%5B%5BB%5D%5D; session_start_time=1329292261764; __utmz=54987508.1329292460.1.1.utmcsr=(direct)|ut
mccn=(direct)|utmcmd=(none); CoreID6=30738140851313292923591&ci=90

All Cookies I investigated are suspiciously 250 bytes long.

It seems that varnishlog truncates headers when writing to the binary log.

Yep, it does truncate it... Google fu:

I am now in a situation where I can't determine what happened because I don't have enough information.  I can't replicate the issue because I don't know who the customer was.

What would be the down-side of saving entire headers by default?  Any chances of re-opening that case as a change request?


Thiago Figueiró
Technical Operations Manager
Digital Business
P +61 (0)2 9358 7123
F +61 (0)2 9028 8500

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