2018-10-11 10:45:57,198 [DiscoveryClient-HeartbeatExecutor-0] ERROR c.n.d.s.t.d.RedirectingEurekaHttpClient - Request execution error com.sun.jersey.api.client.ClientHandlerException: A message body reader for Java class com.netflix.appinfo.InstanceInfo, and Java type class com.netflix.appinfo.InstanceInfo, and MIME media type text/html was not found at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:630) at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:586) at com.netflix.discovery.shared.transport.jersey.AbstractJerseyEurekaHttpClient.sendHeartBeat(AbstractJerseyEurekaHttpClient.java:105) at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92) at com.netflix.discovery.shared.transport.decorator.MetricsCollectingEurekaHttpClient.execute(MetricsCollectingEurekaHttpClient.java:73) at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89) at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92) at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.executeOnNewServer(RedirectingEurekaHttpClient.java:118) at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.execute(RedirectingEurekaHttpClient.java:79) at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89) at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92) at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:119) at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89) at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92) at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77) at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89) at com.netflix.discovery.DiscoveryClient.renew(DiscoveryClient.java:824) at com.netflix.discovery.DiscoveryClient$HeartbeatThread.run(DiscoveryClient.java:1393) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) 2018-10-11 10:45:57,199 [DiscoveryClient-HeartbeatExecutor-0] WARN c.n.d.s.t.d.RetryableEurekaHttpClient - Request execution failed with message: A message body reader for Java class com.netflix.appinfo.InstanceInfo, and Java type class com.netflix.appinfo.InstanceInfo, and MIME media type text/html was not found 2018-10-11 10:45:57,199 [DiscoveryClient-HeartbeatExecutor-0] ERROR c.n.d.DiscoveryClient - DiscoveryClient_OSM-ADMIN/10.132.81.36:osm-admin:8082 - was unable to send heartbeat! com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:111) at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89) at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92) at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77) at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89) at com.netflix.discovery.DiscoveryClient.renew(DiscoveryClient.java:824) at com.netflix.discovery.DiscoveryClient$HeartbeatThread.run(DiscoveryClient.java:1393) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745)
2018-10-10 17:54:26,693 [DiscoveryClient-HeartbeatExecutor-0] ERROR c.n.d.s.t.d.RedirectingEurekaHttpClient - Request execution error com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused: connect
[DiscoveryClient-HeartbeatExecutor-0] WARN c.n.d.s.t.d.RetryableEurekaHttpClient - Request execution failed with message: A message body reader for Java class com.netflix.appinfo.InstanceInfo, and Java type class com.netflix.appinfo.InstanceInfo, and MIME media type text/html was not found 2018-10-11 14:30:14,194 [DiscoveryClient-HeartbeatExecutor-0] ERROR c.n.d.DiscoveryClient - DiscoveryClient_OSM-ADMIN/10.132.81.36:osm-admin:8082 - was unable to send heartbeat! com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
Streama is a free self hosted media streaming server running on Java, that you can install on your Linux distribution. Its features are similar to those of Kodi and Plex and it is simply a matter of personal choice which one you would like to use.
Streama is a decent Streaming self hosted media server that can get you some useful features. Is it any better compared to Plex and Kodi? Probably not, but yet it is up to you to decide.
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Quoting James Lewes and Martin Fowler, who played a key role in promoting microservices as an architectural style, is the best way to introduce this concept. Their authoritative article titled "Microservices" defines microservices as an approach to building a single application consisting of multiple small services that operate independently, with each service running in its own process and communicating using lightweight mechanisms like HTTP resource APIs. These services are designed around specific business capabilities and can be deployed independently using fully automated deployment tools. There is minimal centralized management of these services, which can be written in different programming languages and use various data storage technologies.
Microservices in Java refers to a software architecture pattern where an application is built as a collection of small, independent, and loosely coupled services that work together to provide a complete functionality. Each microservice is a standalone component that can be developed, deployed, and scaled independently, allowing for greater flexibility and scalability in large-scale applications.
In the context of Java, microservices are typically implemented using frameworks and tools that support the development of distributed systems. Some popular Java-based frameworks for building microservices include Spring Boot, Dropwizard, and Micronaut. These frameworks provide the necessary abstractions and utilities to simplify the development, deployment, and management of microservices.
When building microservices in Java, it is important to consider aspects such as service discovery, load balancing, fault tolerance, monitoring, and centralized logging. Also, implementing security measures, such as authentication and authorization, becomes crucial when working with distributed systems.
Microservices in Java provide a modular and scalable approach to developing complex applications by breaking them down into smaller, manageable components. This architectural style fosters flexibility, resilience, and the ability to adapt to changing business requirements.
Most enterprises start by designing their infrastructures as a single monolith or several tightly interdependent monolithic applications. The monolith carries out many functions. All of the programming for those functions resides in a cohesive piece of application code.
Over time, companies cannot make further changes to their coding without starting over from scratch. The process rapidly becomes overwhelming and can result in enterprises remaining stuck in their older methods long after they should have moved on to more upgrades.
At this point, developers may choose to divide a monolith's functionality into small, independently running microservices. The microservices loosely connect via APIs to form a microservices-based application architecture. Microservices architecture offers greater agility and pluggability because enterprises can independently develop, deploy, and scale each microservice. They can do this without necessarily incurring service outages, negatively impacting other parts of the application, or needing to refactor other microservices. The process is simpler, and when one part of the application needs to be adjusted or upgraded, this may be done without affecting everything else. The entire system is made more manageable.
As you can see, there are many benefits to microservices. They are more likely to be used by enterprises that have outgrown the original monolith system, but many companies now design their microservices architecture from the beginning. They learn from the mistakes of others and have discovered that it is easier to start out with a plan for expansion.
Study the operation of the monolith and determine the component functions and services it performs. Since all the functions will be mixed together, this may pose a challenge. It is an important part of determining what is needed for the microservices, so it should be the first thing developers focus on.
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