simply about difficult
Suppose you just run into this exception, saying that gRPC cannot assign requested address: TL;DR: most likely you opened too many connections, and you run out of ephemeral ports. Consider channel/stub reuse: https://mchesnavsky.tech/grpc-channel-stub-reuse. Details: first, we should distinguish between fixed ports, and ephemeral ports. Ephemeral ports are typically used by client devices initiating communication with […]
READ MORECreating new gRPC channels and stubs involves establishing connections and negotiating capabilities with the server. Reusing them eliminates this overhead for subsequent calls. By keeping connections alive, you avoid the initial handshake delay for each RPC, leading to faster communication. However, you should ensure that reusing the channel doesn’t create a bottleneck in your application. […]
READ MORELet’s discuss some details around that how gRPC manages transport providers. Remember, that we have two closely related concepts in gRPC: If you didn’t familiar with NameResolvers, I strongly encourage you to peruse previous part of our narrative here: https://mchesnavsky.tech/name-resolution-providers. This article will be about the latter. Alright, we should elaborate, that a gRPC channel […]
READ MOREWe have something special today. It all started with that I updated grpc-java version from 1.43.2 to 1.60.0. Alright, I just updated dependency and anticipated it working. However, I run into exception on ManagedChannel build at the client side: Exception I got looks like this: Another modifications: If you’re looking for the simplest & quickest […]
READ MORESuppose we just run into this error: And you use IntelliJ IDEA. The thing is that you need to double check at least four places that you have chosen the proper JDK version. Step #1 First things first, make sure that you have JDK 21 selected under File -> Project Settings -> Project -> SDK: […]
READ MORESuppose you have an error: Or related one: The first thing you need to do is to check your main class defined in manifest. If you’re 100% sure that everything is all right, then check any running JVM processes, associated with that file and kill them. The thing is that you probably ran the old […]
READ MOREIf you getting these opencensus errors in GCP from time to time: It worth to recheck dependency version of each opencensus component, that actually presented in your final jar: You may have opencensus-api version 0.19.2, and opencensus-impl version 0.15.0. Thus solution is to equalize all these versions. You can review your dependency versions with following […]
READ MOREIf you facing this error: Then the reason is Java XML Binding, it is a tool for mapping between XML documents and Java objects. These classes has been removed from internal of JDK since 11 version and moved to Jakarta EE. This transition was happened with replacing javax to jakarta in package names. javax in your stacktrace tells us that […]
READ MOREException looks like this: Suppose you want to start mockserver docker image on Mac M1. Probably you doing something like this: Most likely this error happens because of poor docker x86-64 image compatibility with the ARM (M1) CPU architecture. If you see carefully, then you can find out that some versions of mockserver images (including […]
READ MORESuppose you have Spring Boot actuator in your application, and you want to access metrics programmatically. Or you want to gather a lot of system/application metrics initially. After you enable the Spring Boot actuator in your application (https://www.baeldung.com/spring-boot-actuators), just autowire all actuator auto wire candidates: You can use them like this: That’s all.
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