How to handle UndeliverableException error thrown via blockingFirst() in Micronaut? - rx-java2

Question

Below is a snippet from my micronaut web service:
try {
val result = hClient.exchange(GET<String>("$readEndpoint/$token")).blockingFirst()
logger.error("result")
} catch (e: Exception) {
logger.error(e.message)
}
hClient is a reactive http client injected as #Inject val hClient: RxHttpClient
The endpoint is throwing "Connection reset by peer" exception.
Issue I am facing
Even though I have wrapped code in try and catch, An exception io.reactivex.exceptions.UndeliverableException is thrown and not caught.
I basically get two exceptions thrown, one is caught by catch block with message Error occurred reading HTTP response: Connection reset by peer, another one is flowing up to service with message io.reactivex.exceptions.UndeliverableException: The exception could not be delivered to the consumer because it has already canceled/disposed the flow or the exception has nowhere to go to begin with. Further reading: https://github.com/ReactiveX/RxJava/wiki/What's-different-in-2.0#error-handling | java.nio.channels.ClosedChannelException
Reproducible via below code
Keep timeout too less to receive a timeout error.
micronaut:
http:
client:
read-timeout: 1s
#Controller("/")
class TokenController(
#Client("https://hello123456789.com/dummy") #Inject val hClient: RxHttpClient
) {
#Get("/test")
fun refresh(): String {
try {
val result = hClient.exchange(HttpRequest.GET<String>("/token/1234")).blockingFirst()
println("result")
} catch (e: Exception) {
println(e.message)
}
return ""
}
}
Googling told me that I need to add global onError to rxjava but couldn't find how to do that in Micronaut.
Any help is appreciated.