There's a definite desire to separate the controller and normal traffic. That's evident in the comment linked below. I don't know the exact reasons why this is desired behavior.
Also, I misspoke earlier. It's not just the logging. They want to separate the controller and normal traffic into different connections. The separated logging is a natural consequence of that. https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/clients/consumer/internals/AbstractCoordinator.java#L593 > On Oct 23, 2017, at 2:21 AM, pravin kumar <pk007...@gmail.com> wrote: > > i have one doubt in ur answer: why should we differentiate the kafka logs > trafiic from controller node with the normal trafiic from the same node?? > > >> On Sat, Oct 21, 2017 at 1:52 AM, Eric Azama <eazama...@gmail.com> wrote: >> >> Kafka logs traffic to the Controller node separately from the normal >> traffic to the node. In order to differentiate it subtracts the broker id >> from 2147483647 (max int) and uses the result as the "node id" for the >> controller. >> >> On a related note, logs and metrics related to the bootstrap process seems >> to be logged with negative integers. -1 for the first bootstrap server, -2 >> for the second and so on. >> >> >> >> ---------- Forwarded message ---------- >> From: pravin kumar <pk007...@gmail.com> >> To: users@kafka.apache.org >> Cc: >> Bcc: >> Date: Fri, 20 Oct 2017 14:44:04 +0530 >> Subject: reg Kafka Node num >> I have run a Multiple Partition and Multiple Consumer application.Then i >> have altered the no of Partitions, >> >> in log im getting >> >> Using older server API v0 to send HEARTBEAT >> {group_id= >> altermultipartitionmulticonsumer2,group_generation_id=6, >> member_id=C2-b7b4f485-d0c3-466b-b0e7-b3de834832e9} to node 2147483647. >> (org.apache.kafka.clients.NetworkClient) >> >> i have one node and 3 consumers and 15 partitions. >> >> my doubt is :why im getting this num node 2147483647 since i have only >> one node >>
