[Varnish] #283: varnishlog stops working at 2gb

Varnish varnish-bugs at projects.linpro.no
Fri Jul 25 12:42:00 CEST 2008

#283: varnishlog stops working at 2gb
 Reporter:  wichert     |        Owner:  phk                
     Type:  defect      |       Status:  closed             
 Priority:  normal      |    Milestone:  Varnish 2.0 release
Component:  varnishlog  |      Version:  trunk              
 Severity:  normal      |   Resolution:  invalid            
 Keywords:              |  
Comment (by wichert):

 OS limits seem fine:
 [root at wrk-varn01 proxy]# ulimit -a
 core file size          (blocks, -c) 0
 data seg size           (kbytes, -d) unlimited
 max nice                        (-e) 0
 file size               (blocks, -f) unlimited
 pending signals                 (-i) 27776
 max locked memory       (kbytes, -l) 32
 max memory size         (kbytes, -m) unlimited
 open files                      (-n) 1024
 pipe size            (512 bytes, -p) 8
 POSIX message queues     (bytes, -q) 819200
 max rt priority                 (-r) 0
 stack size              (kbytes, -s) 10240
 cpu time               (seconds, -t) unlimited
 max user processes              (-u) 27776
 virtual memory          (kbytes, -v) unlimited
 file locks                      (-x) unlimited

 The filesystem (ext3) also supports larger files. As a test I made a copy
 of varnish.log and added it to itself, which worked fine:

 [root at wrk-varn01 log]# cp -a varnish.log /tmp
 [root at wrk-varn01 log]# cat varnish.log >> /tmp/varnish.log
 [root at wrk-varn01 log]# du -hs /tmp/varnish.log
 4.1G    /tmp/varnish.log

 .. more poking around ..

 strace indeed shows write(2) failing:
 write(4, "\7\0\34\0\03010.7.50.183 59122"..., 34) = -1 EFBIG
 (File too large)
 --- SIGXFSZ (File size limit exceeded) @ 0 (0) ---
 +++ killed by SIGXFSZ +++
 I wonder why cat succeeds where varnishlog fails.

Ticket URL: <http://varnish.projects.linpro.no/ticket/283#comment:2>
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