Unable to use grpcui through load balancer in v1.4.2+

[rgallagher-adc]

We have a couple grpc servers sitting behind a load balancer. When I use grpcui release versions 1.4.2 and 1.4.3 via the load balancer I see:

Failed to compute set of methods to expose: rpc error: code = Internal desc = stream terminated by RST_STREAM with error code: INTERNAL_ERROR

When we use v1.4.1 or earlier I am able to connect no problem.

Interestingly, when I use version 1.4.2 to connect directly to the server behind the load balancer, I am able to connect without issue.

In case it's useful here are the verbose logs when I use v1.4.3:

2025/05/21 15:59:51 INFO: [core] [Channel #1] Channel created
2025/05/21 15:59:51 INFO: [core] [Channel #1] original dial target is: ":443"
2025/05/21 15:59:51 INFO: [core] [Channel #1] parsed dial target is: resolver.Target{URL:url.URL{Scheme:"", Opaque:"443", User:(url.Userinfo)(nil), Host:"", Path:"", RawPath:"", OmitHost:false, ForceQuery:false, RawQuery:"", Fragment:"", RawFragment:""}}
2025/05/21 15:59:51 INFO: [core] [Channel #1] fallback to scheme "passthrough"
2025/05/21 15:59:51 INFO: [core] [Channel #1] parsed dial target is: passthrough:///:443
2025/05/21 15:59:51 INFO: [core] [Channel #1] Channel authority set to ":443"
2025/05/21 15:59:51 INFO: [core] [Channel #1] Resolver state updated: {
"Addresses": [
{
"Addr": ":443",
"ServerName": "",
"Attributes": null,
"BalancerAttributes": null,
"Metadata": null
}
],
"Endpoints": [
{
"Addresses": [
{
"Addr": ":443",
"ServerName": "",
"Attributes": null,
"BalancerAttributes": null,
"Metadata": null
}
],
"Attributes": null
}
],
"ServiceConfig": null,
"Attributes": null
} (resolver returned new addresses)
2025/05/21 15:59:51 INFO: [core] [Channel #1] Channel switches to new LB policy "pick_first"
2025/05/21 15:59:51 INFO: [core] [pick-first-lb 0xc0003cb290] Received new config {
"shuffleAddressList": false
}, resolver state {
"Addresses": [
{
"Addr": ":443",
"ServerName": "",
"Attributes": null,
"BalancerAttributes": null,
"Metadata": null
}
],
"Endpoints": [
{
"Addresses": [
{
"Addr": ":443",
"ServerName": "",
"Attributes": null,
"BalancerAttributes": null,
"Metadata": null
}
],
"Attributes": null
}
],
"ServiceConfig": null,
"Attributes": null
}
2025/05/21 15:59:51 INFO: [core] [Channel #1 SubChannel #2] Subchannel created
2025/05/21 15:59:51 INFO: [core] [Channel #1] Channel Connectivity change to CONNECTING
2025/05/21 15:59:51 INFO: [core] [Channel #1] Channel exiting idle mode
2025/05/21 15:59:51 INFO: [core] [Channel #1 SubChannel #2] Subchannel Connectivity change to CONNECTING
2025/05/21 15:59:51 INFO: [core] [Channel #1 SubChannel #2] Subchannel picks a new address "**:443" to connect
2025/05/21 15:59:51 INFO: [core] [pick-first-lb 0xc0003cb290] Received SubConn state update: 0xc0003cb4a0, {ConnectivityState:CONNECTING ConnectionError:}
2025/05/21 15:59:51 INFO: [core] [Channel #1 SubChannel #2] Subchannel Connectivity change to READY
2025/05/21 15:59:51 INFO: [core] [pick-first-lb 0xc0003cb290] Received SubConn state update: 0xc0003cb4a0, {ConnectivityState:READY ConnectionError:}
2025/05/21 15:59:51 INFO: [core] [Channel #1] Channel Connectivity change to READY
Failed to compute set of methods to expose: rpc error: code = Internal desc = stream terminated by RST_STREAM with error code: INTERNAL_ERROR
2025/05/21 15:59:51 INFO: [core] [Channel #1] Channel Connectivity change to SHUTDOWN
2025/05/21 15:59:51 INFO: [core] [Channel #1] Closing the name resolver
2025/05/21 15:59:51 INFO: [core] [Channel #1] ccBalancerWrapper: closing
2025/05/21 15:59:51 INFO: [core] [Channel #1 SubChannel #2] Subchannel Connectivity change to SHUTDOWN
2025/05/21 15:59:51 INFO: [core] [Channel #1 SubChannel #2] Subchannel deleted
2025/05/21 15:59:51 INFO: [transport] [client-transport 0xc00037c488] Closing: rpc error: code = Canceled desc = grpc: the client connection is closing
2025/05/21 15:59:51 INFO: [transport] [client-transport 0xc00037c488] loopyWriter exiting with error: transport closed by client
2025/05/21 15:59:51 INFO: [core] [Channel #1] Channel deleted

These are the verbose logs for v1.4.1:

2025/05/21 19:28:01 INFO: [core] [Channel #1] Channel created
2025/05/21 19:28:01 INFO: [core] [Channel #1] original dial target is: ":443"
2025/05/21 19:28:01 INFO: [core] [Channel #1] parsed dial target is: resolver.Target{URL:url.URL{Scheme:"", Opaque:"443", User:(url.Userinfo)(nil), Host:"", Path:"", RawPath:"", OmitHost:false, ForceQuery:false, RawQuery:"", Fragment:"", RawFragment:""}}
2025/05/21 19:28:01 INFO: [core] [Channel #1] fallback to scheme "passthrough"
2025/05/21 19:28:01 INFO: [core] [Channel #1] parsed dial target is: passthrough:///:443
2025/05/21 19:28:01 INFO: [core] [Channel #1] Channel authority set to ":443"
2025/05/21 19:28:01 INFO: [core] [Channel #1] Resolver state updated: {
"Addresses": [
{
"Addr": ":443",
"ServerName": "",
"Attributes": null,
"BalancerAttributes": null,
"Metadata": null
}
],
"Endpoints": [
{
"Addresses": [
{
"Addr": ":443",
"ServerName": "",
"Attributes": null,
"BalancerAttributes": null,
"Metadata": null
}
],
"Attributes": null
}
],
"ServiceConfig": null,
"Attributes": null
} (resolver returned new addresses)
2025/05/21 19:28:01 INFO: [core] [Channel #1] Channel switches to new LB policy "pick_first"
2025/05/21 19:28:01 INFO: [core] [pick-first-lb 0xc000357620] Received new config {
"shuffleAddressList": false
}, resolver state {
"Addresses": [
{
"Addr": ":443",
"ServerName": "",
"Attributes": null,
"BalancerAttributes": null,
"Metadata": null
}
],
"Endpoints": [
{
"Addresses": [
{
"Addr": ":443",
"ServerName": "",
"Attributes": null,
"BalancerAttributes": null,
"Metadata": null
}
],
"Attributes": null
}
],
"ServiceConfig": null,
"Attributes": null
}
2025/05/21 19:28:01 INFO: [core] [Channel #1 SubChannel #2] Subchannel created
2025/05/21 19:28:01 INFO: [core] [Channel #1] Channel Connectivity change to CONNECTING
2025/05/21 19:28:01 INFO: [core] [Channel #1] Channel exiting idle mode
2025/05/21 19:28:01 INFO: [core] [Channel #1 SubChannel #2] Subchannel Connectivity change to CONNECTING
2025/05/21 19:28:01 INFO: [core] [Channel #1 SubChannel #2] Subchannel picks a new address "**:443" to connect
2025/05/21 19:28:01 INFO: [core] [pick-first-lb 0xc000357620] Received SubConn state update: 0xc0003577a0, {ConnectivityState:CONNECTING ConnectionError:}
2025/05/21 19:28:02 INFO: [core] [Channel #1 SubChannel #2] Subchannel Connectivity change to READY
2025/05/21 19:28:02 INFO: [core] [pick-first-lb 0xc000357620] Received SubConn state update: 0xc0003577a0, {ConnectivityState:READY ConnectionError:}
2025/05/21 19:28:02 INFO: [core] [Channel #1] Channel Connectivity change to READY
gRPC Web UI available at http://127.0.0.1:52461/