HystrixCommand and Weld
Hi @all,
since yesterday I observed a strange behaviour with HystrixCommand and Wildfly 10 (Weld).
First we create a Bean with CDI injection:
@Stateless
@Remote
public class Bean implements BeanInterface {
@Inject
private Adapter adapter;
@Override
public Result getDebitData(Request request) {
return adapter.getDebitData(request);
}
}
The adapter communicates to a REST server and is protected by a Hysterix command.
public class Adapter {
@Inject
private RestConnector connector;
@HystrixCommand
@Interceptors({ HystrixInterceptor.class })
public Result getDebitData(Request request) {
Response clientResponse = connector.connect().getDebitData(request);
checkHttpStatusCodeWasSuccess(clientResponse);
return clientResponse.readEntity(Result .class);
}
}
If we now let run our integration test case I observe a strange behaviour. The method getDebitData is not executed once it is executed many times. A breakpoint inside Adapter.getDebitData will be never reached.
The log file log like this:
2017-09-27 15:32:41,971 DEBUG [com.netflix.hystrix.contrib.javanica.command.GenericCommand] (hystrix-Adapter$Proxy$_$$_WeldSubclass-6) execute command: getDebitData
2017-09-27 15:32:41,971 DEBUG [com.netflix.hystrix.contrib.javanica.command.GenericCommand] (hystrix-Adapter$Proxy$_$$_WeldSubclass-9) execute command: getDebitData
2017-09-27 15:32:41,972 DEBUG [com.netflix.hystrix.contrib.javanica.command.GenericCommand] (hystrix-Adapter$Proxy$_$$_WeldSubclass-1) execute command: getDebitData
2017-09-27 15:32:41,974 DEBUG [com.netflix.hystrix.contrib.javanica.command.GenericCommand] (hystrix-Adapter$Proxy$_$$_WeldSubclass-8) execute command: getDebitData
2017-09-27 15:32:41,974 DEBUG [com.netflix.hystrix.contrib.javanica.command.GenericCommand] (hystrix-Adapter$Proxy$_$$_WeldSubclass-10) execute command: getDebitData
2017-09-27 15:32:41,974 DEBUG [com.netflix.hystrix.contrib.javanica.command.GenericCommand] (hystrix-Adapter$Proxy$_$$_WeldSubclass-2) execute command: getDebitData
2017-09-27 15:32:41,975 DEBUG [com.netflix.hystrix.contrib.javanica.command.GenericCommand] (hystrix-Adapter$Proxy$_$$_WeldSubclass-3) execute command: getDebitData
2017-09-27 15:32:41,975 DEBUG [com.netflix.hystrix.contrib.javanica.command.GenericCommand] (hystrix-Adapter$Proxy$_$$_WeldSubclass-5) execute command: getDebitData
2017-09-27 15:32:41,975 DEBUG [com.netflix.hystrix.contrib.javanica.command.GenericCommand] (hystrix-Adapter$Proxy$_$$_WeldSubclass-7) execute command: getDebitData
2017-09-27 15:32:41,976 DEBUG [com.netflix.hystrix.contrib.javanica.command.GenericCommand] (hystrix-Adapter$Proxy$_$$_WeldSubclass-4) execute command: getDebitData
2017-09-27 15:32:41,976 DEBUG [com.netflix.hystrix.AbstractCommand] (hystrix-Adapter$Proxy$_$$_WeldSubclass-4) HystrixCommand execution REJECTED_THREAD_EXECUTION and fallback failed.: java.lan
g.RuntimeException: No fallback available.
[...]
Caused by: java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.FutureTask@6ad88423 rejected from java.util.concurrent.ThreadPoolExecutor@797ba7e8[Running, pool size = 10, active threads = 10, queued tasks = 0, completed tasks = 180]
Hystrix tries many times to execute the command instead of once. The thread pool doesn't have enough size. The connection to the server will never be executed. If I remove the HystricCommand the code works as expected.
The only parameter which is set is: hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds 60000
Does anybody know what happens in the background? Why ist the command executed more than once? How can I get the correct behaviour?
Thanks in advance,
Markus
