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Posted to commits@servicecomb.apache.org by GitBox <gi...@apache.org> on 2020/08/18 14:57:52 UTC
[GitHub] [servicecomb-java-chassis] xuzhiyonggithubper opened a new issue #1925: What Do I Do If a Bug Occurs When Executors Execute Asynchronous Tasks That Contain RestTemplate Invoking?
xuzhiyonggithubper opened a new issue #1925:
URL: https://github.com/apache/servicecomb-java-chassis/issues/1925
**english
scenario:microservice invoke
problems:A task is split into multiple tasks. Executors is used to execute one of the tasks. The task is an asynchronous task (the task is blocked until condition A occurs). When RestTemplate is used to invoke other microservices in the asynchronous task, a bug with an unknown cause occurs.
chinese
场景：微服务调用
问题：将一个任务分解，使用Executors执行其中的一个任务，这个任务是异步任务（调用之后直接阻塞，直到发生条件A），在异步任务中使用RestTemplate调用其他微服务，出现不明原因的bug。**
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[GitHub] [servicecomb-java-chassis] xuzhiyonggithubper commented on issue #1925: What Do I Do If a Bug Occurs When Executors Execute Asynchronous Tasks That Contain RestTemplate Invoking?
Posted by GitBox <gi...@apache.org>.
xuzhiyonggithubper commented on issue #1925:
URL: https://github.com/apache/servicecomb-java-chassis/issues/1925#issuecomment-675535403
Executors es
ArrayList<Callable<String>> list=new ArrayList<>()
list.add(new Watch());
es.invaokeall(list)
futures.for
future.get
invoke other microservice appear exception
class Watch is a asynchronous task
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[GitHub] [servicecomb-java-chassis] xuzhiyonggithubper commented on issue #1925: What Do I Do If a Bug Occurs When Executors Execute Asynchronous Tasks That Contain RestTemplate Invoking?
Posted by GitBox <gi...@apache.org>.
xuzhiyonggithubper commented on issue #1925:
URL: https://github.com/apache/servicecomb-java-chassis/issues/1925#issuecomment-675795619
main方法中执行，伪代码如下，使用Executors执行特定任务，特定任务实现Callable接口。如果不使用线程函数式从上往下结果正常。
Executors es
ArrayList<Callable> list=new ArrayList<>()
list.add(new Watch());
es.invaokeall(list)
futures.for
future.get
invoke other microservice appear exception
//future中调用其他微服务，会出现不正常的日志，函数式从上往下正常。watch是个执行即阻塞的方法（直到满足A添条件）
class Watch is a asynchronous task
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[GitHub] [servicecomb-java-chassis] yhs0092 commented on issue #1925: What Do I Do If a Bug Occurs When Executors Execute Asynchronous Tasks That Contain RestTemplate Invoking?
Posted by GitBox <gi...@apache.org>.
yhs0092 commented on issue #1925:
URL: https://github.com/apache/servicecomb-java-chassis/issues/1925#issuecomment-675795233
你是不是在 Reactive 调用的回调部分代码里写了个同步调用啊？Reactive 调用的回调代码是跑在 eventloop 线程里的，因此不能阻塞，在这里发起同步调用可能会把 eventloop 线程挂住，日志里面会打印 vertx 的报错信息，显示eventloop 线程被 block
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