TaskRepositoy.findByChainDealIdAndTaskIndex() returns non-unique result

[zguesmi]

Error

Query { "$java" : Query: { "chainDealId" : "0x3795a95c341f4d60b829d7b5b37dc26d5f6bacd45b2ec26c4fadd498f25f03b8", "taskIndex" : 0 }, Fields: { }, Sort: { } } returned non unique result

Stacktrace:

Exception in thread "Scheduled-1" io.reactivex.exceptions.OnErrorNotImplementedException: The exception was not handled due to missing onError handler in the subscribe() method call. Further reading: https://github.com/ReactiveX/RxJava/wiki/Error-Handling | org.springframework.dao.IncorrectResultSizeDataAccessException: Query { "$java" : Query: { "chainDealId" : "0x3795a95c341f4d60b829d7b5b37dc26d5f6bacd45b2ec26c4fadd498f25f03b8", "taskIndex" : 0 }, Fields: { }, Sort: { } } returned non unique result.
	at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:704)
    ...
	at io.reactivex.Flowable.subscribe(Flowable.java:14651)
	at com.iexec.core.chain.DealWatcherService.subscribeToDealEventInRange(DealWatcherService.java:176)
	at com.iexec.core.chain.DealWatcherService.replayDealEvent(DealWatcherService.java:160)
	at jdk.internal.reflect.GeneratedMethodAccessor166.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.base/java.lang.reflect.Method.invoke(Unknown Source)
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:343)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:752)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688)
	at com.iexec.core.chain.DealWatcherService$$EnhancerBySpringCGLIB$$6099193c.replayDealEvent(<generated>)
	at jdk.internal.reflect.GeneratedMethodAccessor166.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.base/java.lang.reflect.Method.invoke(Unknown Source)
	at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:84)
	at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.base/java.util.concurrent.FutureTask.runAndReset(Unknown Source)
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)
Caused by: org.springframework.dao.IncorrectResultSizeDataAccessException: Query { "$java" : Query: { "chainDealId" : "0x3795a95c341f4d60b829d7b5b37dc26d5f6bacd45b2ec26c4fadd498f25f03b8", "taskIndex" : 0 }, Fields: { }, Sort: { } } returned non unique result.
	at org.springframework.data.mongodb.core.ExecutableFindOperationSupport$ExecutableFindSupport.oneValue(ExecutableFindOperationSupport.java:133)
	at org.springframework.data.mongodb.repository.query.AbstractMongoQuery.lambda$getExecution$4(AbstractMongoQuery.java:126)
	at org.springframework.data.mongodb.repository.query.AbstractMongoQuery.execute(AbstractMongoQuery.java:99)
	at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:605)
	at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.lambda$invoke$3(RepositoryFactorySupport.java:595)
	at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:595)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:59)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:93)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.data.repository.core.support.SurroundingTransactionDetectorMethodInterceptor.invoke(SurroundingTransactionDetectorMethodInterceptor.java:61)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212)
	at com.iexec.core.task.$Proxy132.findByChainDealIdAndTaskIndex(Unknown Source)
	at com.iexec.core.task.TaskService.addTask(TaskService.java:102)
	at com.iexec.core.chain.DealWatcherService.handleDeal(DealWatcherService.java:130)
	at com.iexec.core.chain.DealWatcherService.onDealEvent(DealWatcherService.java:101)
	at java.base/java.util.Optional.ifPresent(Unknown Source)
	at com.iexec.core.chain.DealWatcherService.lambda$subscribeToDealEventInRange$2(DealWatcherService.java:176)
	at io.reactivex.internal.subscribers.LambdaSubscriber.onNext(LambdaSubscriber.java:65)
	... 39 more

Fix:

Add @Document to Task entity.