dhcp6c crashing on Signal 10

[lrosenman]

It says it made a core dump, but I don't see one.  Anyone else seeing this?

[lrosenman]

It seems(?) to be related to renew, and on ATT Fiber if that helps any.

[lrosenman]

Does anyone have any clues at all on this?  How can I get stuff to help get it diagnosed and hopefully fixed?

[marjohn56]

No other reports of this AFAIK. Firstly, can you set log level to debug for dhcp6c. If there's a core dump, I think it ends up in root, but I may be wrong.

[benyamin]

Just once, or is it a repeat offender...?

[lrosenman]

repeat offender on a regular basis.  Where do I set the debug level for dhcp6c?

[benyamin]

Hopefully this isn't due to comments or invisible white space in that override script...!

Not sure about setting debug level. @marjohn56 would know better.

Perhaps you could run it from the console shell in debug and foreground modes...

Wish I could help more but offline for next several hours... 8^d

[lrosenman]

i found the core.  I just had a system panic, which I dutifully sent to the developers.  We'll see if the dhcp6c stuff calms down. 

Where can I get the symbols for dhcp6c?

[lrosenman]

I also have the level set to debug on the interfaces -> Settings page.  Any help is appreciated.  Also more than happy to arrange access. (It's my home FW).

[marjohn56]

i found the core.  I just had a system panic, which I dutifully sent to the developers.  We'll see if the dhcp6c stuff calms down. 

Where can I get the symbols for dhcp6c?

Interfaces->Settings to set the logging level.

[lrosenman]

i found the core.  I just had a system panic, which I dutifully sent to the developers.  We'll see if the dhcp6c stuff calms down. 

Where can I get the symbols for dhcp6c?

Interfaces->Settings to set the logging level.

Yes, it's at debug.  What can I offer to help here? 

[lrosenman]

so far, post-panic, It's been stable.  We'll see.

[lrosenman]

still been stable. 

[marjohn56]

How often does your lease renew?

[lrosenman]

looks like 30 minutes from the log....

system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=9659
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[47239]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=10849
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[55768]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[59832]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=9551
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[74514]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=10979
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[85594]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=9191
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=10458
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[95736]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=10401
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[7175]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[10397]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 08:16:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=10957
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[46882]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=9222
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[55770]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=10729
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=9089
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[75038]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=10426
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[80741]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[96680]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=10906
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[1957]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=9469
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=10020
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[5194]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=10889
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[18453]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[30103]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 08:46:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=10454
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[28083]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=9891
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=9738
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[38185]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=9607
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[56501]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=9822
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[60948]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[69254]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=10363
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[84442]: dhcp6c RENEW on em4
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: removing an event on em4, state=RENEW
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=10568
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: reset a timer on em4, state=RENEW, timeo=0, retrans=9394
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[27804]: send renew to ff02::1:2%em4
system_20211109.log:Nov  9 09:16:18 home-fw.lerctr.org dhcp6c[93877]: dhcp6c RENEW on em4