The connection observed an error Webflux + Heroku - spring-boot

Question

I've already deployed for a first test my project that validate users through firebase as an external resource server.
In local environment it's working and looks like to be ok for a test on remote environment, usually I use Heroku.
When i first hit the server (with any kind of request), it display these logs :
io.netty.channel.unix.Errors$NativeIoException: epoll_wait(..) failed: Function not implemented
2023-01-06 07:58:02.050 WARN 4 --- [or-http-epoll-5] io.netty.channel.epoll.EpollEventLoop : Unexpected exception in the selector loop.
io.netty.channel.unix.Errors$NativeIoException: epoll_wait(..) failed: Function not implemented
2023-01-06 07:58:03.053 WARN 4 --- [or-http-epoll-5] io.netty.channel.epoll.EpollEventLoop : Unexpected exception in the selector loop.
io.netty.channel.unix.Errors$NativeIoException: epoll_wait(..) failed: Function not implemented
2023-01-06 07:58:04.053 WARN 4 --- [or-http-epoll-5] io.netty.channel.epoll.EpollEventLoop : Unexpected exception in the selector loop.
io.netty.channel.unix.Errors$NativeIoException: epoll_wait(..) failed: Function not implemented
2023-01-06 07:58:05.054 WARN 4 --- [or-http-epoll-5] io.netty.channel.epoll.EpollEventLoop : Unexpected exception in the selector loop.
io.netty.channel.unix.Errors$NativeIoException: epoll_wait(..) failed: Function not implemented
2023-01-06 07:58:06.054 WARN 4 --- [or-http-epoll-5] io.netty.channel.epoll.EpollEventLoop : Unexpected exception in the selector loop.
io.netty.channel.unix.Errors$NativeIoException: epoll_wait(..) failed: Function not implemented
ter at=error code=H12 desc="Request timeout" method=POST path="/user" host=dlv-izac-user.herokuapp.com request_id=1355dcfb-ffa5-4202-ab02-171c8f799711 fwd="87.0.149.6" dyno=web.1 connect=0ms service=30000ms status=503 bytes=0 protocol=https
2023-01-06 07:58:07.055 WARN 4 --- [or-http-epoll-5] io.netty.channel.epoll.EpollEventLoop : Unexpected exception in the selector loop.
io.netty.channel.unix.Errors$NativeIoException: epoll_wait(..) failed: Function not implemented
2023-01-06 07:58:08.056 WARN 4 --- [or-http-epoll-5] io.netty.channel.epoll.EpollEventLoop : Unexpected exception in the selector loop.
io.netty.channel.unix.Errors$NativeIoException: epoll_wait(..) failed: Function not implemented
2023-01-06 07:58:09.056 WARN 4 --- [or-http-epoll-5] io.netty.channel.epoll.EpollEventLoop : Unexpected exception in the selector loop.
io.netty.channel.unix.Errors$NativeIoException: epoll_wait(..) failed: Function not implemented
2023-01-06 07:58:10.056 WARN 4 --- [or-http-epoll-5] io.netty.channel.epoll.EpollEventLoop : Unexpected exception in the selector loop.
io.netty.channel.unix.Errors$NativeIoException: epoll_wait(..) failed: Function not implemented
2023-01-06 07:58:11.057 WARN 4 --- [or-http-epoll-5] io.netty.channel.epoll.EpollEventLoop : Unexpected exception in the selector loop.
io.netty.channel.unix.Errors$NativeIoException: epoll_wait(..) failed: Function not implemented
2023-01-06 07:58:12.079 WARN 4 --- [or-http-epoll-5] r.netty.http.client.HttpClientConnect : [884b052a, L:/172.16.225.34:54424 ! R:www.googleapis.com/74.125.193.95:443] The connection observed an error
java.nio.channels.ClosedChannelException: null
at io.netty.handler.ssl.SslHandler.channelInactive(SslHandler.java:1064) ~[netty-handler-4.1.76.Final.jar!/:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262) ~[netty-transport-4.1.76.Final.jar!/:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248) ~[netty-transport-4.1.76.Final.jar!/:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:241) ~[netty-transport-4.1.76.Final.jar!/:4.1.76.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelInactive(DefaultChannelPipeline.java:1405) ~[netty-transport-4.1.76.Final.jar!/:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262) ~[netty-transport-4.1.76.Final.jar!/:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248) ~[netty-transport-4.1.76.Final.jar!/:4.1.76.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelInactive(DefaultChannelPipeline.java:901) ~[netty-transport-4.1.76.Final.jar!/:4.1.76.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe$7.run(AbstractChannel.java:813) ~[netty-transport-4.1.76.Final.jar!/:4.1.76.Final]
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164) ~[netty-common-4.1.76.Final.jar!/:4.1.76.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:469) ~[netty-common-4.1.76.Final.jar!/:4.1.76.Final]
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:391) ~[netty-transport-classes-epoll-4.1.76.Final.jar!/:4.1.76.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986) ~[netty-common-4.1.76.Final.jar!/:4.1.76.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.76.Final.jar!/:4.1.76.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.76.Final.jar!/:4.1.76.Final]
at java.base/java.lang.Thread.run(Thread.java:829) ~[na:na]
2023-01-06 07:58:12.089 WARN 4 --- [or-http-epoll-5] io.netty.channel.epoll.EpollEventLoop : Unexpected exception in the selector loop.
io.netty.channel.unix.Errors$NativeIoException: epoll_wait(..) failed: Function not implemented
this is my yaml:
spring:
data:
mongodb:
auto-index-creation: false
uri: mongodb+srv://izac-user?retryWrites=true
security:
oauth2:
resourceserver:
jwt:
jwk-set-uri: https://www.googleapis.com/service_accounts/v1/jwk/securetoken%40system.gserviceaccount.com
rabbitmq:
port: 5671
host: ${RABBITMQ_HOST}
username: ${RABBITMQ_USERNAME}
password: ${RABBITMQ_PASSWORD}
ssl:
enabled: true
listener:
simple:
retry:
enabled: true
initial-interval: 3s
max-attempts: 2
max-interval: 5s
multiplier: 1
external-services:
izac: https://izac-dlv.herokuapp.com
qrcode: https://dlv-qrcode-generator.herokuapp.com
firebase:
credentials : XXX.json
projectId: XX-YYY.json
and this is my pom:
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-oauth2-resource-server</artifactId>
<version>3.0.0</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>com.google.firebase</groupId>
<artifactId>firebase-admin</artifactId>
<version>9.1.1</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb-reactive</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-amqp</artifactId>
<version>3.0.0</version>
</dependency>
<dependency>
<groupId>org.springdoc</groupId>
<artifactId>springdoc-openapi-ui</artifactId>
<version>1.6.13</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-amqp</artifactId>
<version>3.0.0</version>
</dependency>

Answer 1

I rewrite my comment :
After some tests the exception looks like to be caused by this part of the yaml:
https://www.googleapis.com/service_accounts/v1/jwk/securetoken%40system.gserviceaccount.com
because of the log [884b052a, L:/172.16.225.34:54424 ! R:www.googleapis.com/74.125.193.95:443] The connection observed an error
java.nio.channels.ClosedChannelException: null
But i cannot understand why.
security:
oauth2:
resourceserver:
jwt:
jwk-set-uri: https://www.googleapis.com/service_accounts/v1/jwk/securetoken%40system.gserviceaccount.com
Still not solved the error.