*Problem Description:*
I am trying to configure the round_robin load balancing policy using a Service Config provided via DNS, as outlined in the A2-service-configs-in-dns.md <https://github.com/grpc/proposal/blob/master/A2-service-configs-in-dns.md>. However, I do not observe any DNS TXT record queries in the client logs, and the load balancing policy remains set to pick_first. ------------------------------ *Additional Details:* 1. *Environment:* - The gRPC client *(grpc-c++/1.30.3 grpc-c/10.0.0 (linux; chttp2)*) is configured with the following service URI: <streaming-recognition service-uri="dns:///aiml-pool.dev.orange.intra:50051" /> 2. *DNS Setup:* - The DNS record is configured as follows: $ nslookup -type=TXT _grpc_config.aiml-pool.dev.orange.intraServer: 62.217.251.212Address: 62.217.251.212#53 Non-authoritative answer:_grpc_config.aiml-pool.dev.orange.intra text = "grpc_config=[{\"serviceConfig\":{\"loadBalancingPolicy\":\"round_robin\",\"methodConfig\":[{\"name\":[{\"service\":\"VoicebotService\",\"method\":\"recognize\"}],\"waitForReady\":true}]}}]" 3. *Client Logs:* - Enabling DEBUG level logs shows queries for A and AAAA records, but no queries for TXT records (entire log file is attached): [DEBUG] Load Streaming Recognition Attribute: service-uri = dns:///aiml-pool.dev.orange.intra:50051[DEBUG] Using ares dns resolver[DEBUG] (c-ares resolver) request:0x7f6714037610 create_hostbyname_request_locked host:aiml-pool.dev.orange.intra port:33731 is_balancer:0 qtype:AAAA[DEBUG] (c-ares resolver) request:0x7f6714037610 create_hostbyname_request_locked host:aiml-pool.dev.orange.intra port:33731 is_balancer:0 qtype:A[DEBUG] (c-ares resolver) request:0x7f7bf8037610 on_hostbyname_done_locked qtype=A host=aiml-pool.dev.orange.intra ARES_SUCCESS[DEBUG] (c-ares resolver) request:0x7f7bf8037610 c-ares resolver gets a AF_INET result:[DEBUG] (c-ares resolver) request:0x7f7bf8037610 c-ares resolver gets a AF_INET result:[INFO] [child_policy_handler 0x7f7bd4001ea0] created new LB policy "pick_first" (0x7f7bf80253f0) 4. *Expected Behavior:* - The client should query the TXT record _grpc_config.aiml-pool.dev.orange.intra to retrieve the ServiceConfig and apply the round_robin policy. ------------------------------ *Questions:* 1. Is there a specific configuration required to enable the client to query TXT records for the Service Config? 2. Could there be a limitation or bug in the C gRPC client implementation that prevents it from querying TXT records? Thank you for your assistance! Best regards, Gabriel Banu -- You received this message because you are subscribed to the Google Groups "grpc.io" group. To unsubscribe from this group and stop receiving emails from it, send an email to grpc-io+unsubscr...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/grpc-io/c09b0708-0f0d-4eb0-b894-a0357a186f71n%40googlegroups.com.
