These are chat archives for allegro/hermes

17th
Oct 2016
Stevo Slavić
@sslavic
Oct 17 2016 12:55
hi there
Adam Dubiel
@adamdubiel
Oct 17 2016 12:56
hi
Stevo Slavić
@sslavic
Oct 17 2016 12:56
great to hear about 0.10 support being rolled out, PR merged
Adam Dubiel
@adamdubiel
Oct 17 2016 12:56
already runnin it on prod, everything looks good
:)
Stevo Slavić
@sslavic
Oct 17 2016 12:59
nice; also good timing, we were just about to evaluate the PR, with our additions (trying to enable security, at least ZK first)
curious about your comment related to consumer groups
Adam Dubiel
@adamdubiel
Oct 17 2016 12:59
yes, what about it?
Stevo Slavić
@sslavic
Oct 17 2016 13:00
are names changed with new logis so offsets will be (re)set according to auto reset setting?
logic*
Adam Dubiel
@adamdubiel
Oct 17 2016 13:00
no, no offsets are reset
but we tested running consumers for 0.10 an 0.9 on same cluster and afair it did not go well
Stevo Slavić
@sslavic
Oct 17 2016 13:00
ah I understand
Adam Dubiel
@adamdubiel
Oct 17 2016 13:01
maybe lets ask @wojtkiewicz who did the tesing for details
Stevo Slavić
@sslavic
Oct 17 2016 13:01
well with 0.10, it's not client side activity anymore, or at least not as much, to do the rebalancing of consumer instances in a group
Adam Dubiel
@adamdubiel
Oct 17 2016 13:01
yes, exactly
Stevo Slavić
@sslavic
Oct 17 2016 13:01
while with 0.9 and before it was all almost client side activity, fiddling with zookeeper
Adam Dubiel
@adamdubiel
Oct 17 2016 13:01
so offsets are fine as long as you have been committing them in dual mode or to kafka only
Stevo Slavić
@sslavic
Oct 17 2016 13:02
so mixing two probably messed up, broker tried to decide and client to loadbalance same group, they were stepping on each other toes
to kafka only; good to know, thanks for clarification
Adam Dubiel
@adamdubiel
Oct 17 2016 13:02
yeah, i'm not sure if it was a total disaster or something worked, but i know it was not good overall
and stopping all consumers / upgrading / starting went very well, no problems