Netty: Requests are failing after some time

[deyanTG]

Hi,
We are using SBA 2.0.0 and our application is written on Spring Boot 2.0.0. We are able to run the SBA instance but occasionally we are getting the following errors.

Firefox

Chrome

After 'refresh' it works fine for some time but eventually breaks out again.

[joshiste]

After which time the error occurs? Could you please provide a sample project (GH repo or zip file) to reproduce the issue? (Works on my machine 😄 )

[deyanTG]

It depends... Sometimes the errors show up after a couple of seconds, sometimes several minutes are needed. I'd say it is not determinated.

This is another excerpt with open chrome console.

I'll provide and code repo as well, but I'am using simple SBA project with only one main method annotated with @EnableAdminServer.

There are only two configurations in application.properties of SBA.

server.port=19000 management.security.enabled=false

Client configurations related to SBA are the following:

spring.boot.admin.client.url=http://127.0.0.1:19000 spring.boot.admin.client.instance.management-base-url=http://127.0.0.1:18080 management.endpoints.web.exposure.include=*

[joshiste]

What Java version and platform is it running on?

[deyanTG]

java version "1.8.0_151"

Linux OS-0060 3.16.0-4-amd64 #1 SMP Debian 3.16.51-3 (2017-12-13) x86_64 GNU/Linux

[joshiste]

is the admin server running on tomcat (did you include spring-boot-starter-web?) or is it running on netty?

[deyanTG]

These are declared dependencies:

<dependency>
<groupId>de.codecentric</groupId>
 <artifactId>spring-boot-admin-starter-server</artifactId>
 <version>2.0.0</version>
</dependency>

<dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter</artifactId>
</dependency>

These are dependenciess from client side

<dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

<dependency>
 <groupId>de.codecentric</groupId>
 <artifactId>spring-boot-admin-starter-client</artifactId>
 <version>2.0.0</version>
</dependency>

As I said,we're using Spring Boot 2.0.0

2018-06-12 16:59:08.833 INFO 10257 --- [ctor-http-nio-1] r.ipc.netty.tcp.BlockingNettyContext : Started HttpServer on /0:0:0:0:0:0:0:0:19000 2018-06-12 16:59:08.834 INFO 10257 --- [ main] o.s.b.web.embedded.netty.NettyWebServer : Netty started on port(s): 19000

Netty container is in use

[joshiste]

Please add the spring-boot-starter-web and try running on tomcat

[deyanTG]

After switching to tomcat (as joshiste suggested) we don't get the above mentioned problems. Will monitor the system for some time but until now it never worked for so much time without getting rendering problems.