Question

我有一个非常简单的Spring Boot应用程序，该应用程序从外部系统接收数据并将其保存到Couchbase。我正在尝试处理我的应用程序遇到数据库临时连接问题的情况。

我在应用程序中使用Couchbase 6.0和spring-data-couchbase版本3.1.2.RELEASE，并尝试通过RetryTemplate实现CustomExceptionClassifierRetryPolicy，如下所示：

retryTemplate.setRetryPolicy(new CustomExceptionClassifierRetryPolicy());

下面是我的CustomExceptionClassifierRetryPolicy

的实现

public class CustomExceptionClassifierRetryPolicy extends ExceptionClassifierRetryPolicy {
private static final long serialVersionUID = 1L;

public CustomExceptionClassifierRetryPolicy() {
    final AlwaysRetryPolicy alwaysRetryPolicy = new AlwaysRetryPolicy();
    this.setExceptionClassifier(new Classifier<Throwable, RetryPolicy>() {
        @Override
        public RetryPolicy classify(Throwable classifiable) {
            if (classifiable.getCause() instanceof TransientDataAccessException) {
                return alwaysRetryPolicy;
            }
            return new NeverRetryPolicy();
        }
    });
}

}

通过上述实现，我将AlwaysRetryPolicy设置为处理所有与瞬态网络相关的问题，这些问题可能会在一段时间后解决。

问题是，当我关闭Couchbase并尝试插入文档（只是为了模拟网络问题）时，我从docs中看到CouchbaseDataIntegrityViolationException异常（请参阅下面的stacktrace） NonTransientDataAccessException的子类。这完全违反了定义CustomExceptionClassifierRetryPolicy的目的。

org.springframework.data.couchbase.core.CouchbaseDataIntegrityViolationException: Insert document failed: java.util.concurrent.TimeoutException: {"b":"LWS_ORDER_AUDIT","s":"kv","t":2500000,"i":"0x88"}; nested exception is java.lang.RuntimeException: java.util.concurrent.TimeoutException: {"b":"LWS_ORDER_AUDIT","s":"kv","t":2500000,"i":"0x88"}
    at org.springframework.data.couchbase.core.CouchbaseTemplate.handleWriteResultError(CouchbaseTemplate.java:208)
    at org.springframework.data.couchbase.core.CouchbaseTemplate.access$500(CouchbaseTemplate.java:97)
    at org.springframework.data.couchbase.core.CouchbaseTemplate$11.doInBucket(CouchbaseTemplate.java:658)
    at org.springframework.data.couchbase.core.CouchbaseTemplate$11.doInBucket(CouchbaseTemplate.java:603)
    at org.springframework.data.couchbase.core.CouchbaseTemplate.execute(CouchbaseTemplate.java:553)
    at org.springframework.data.couchbase.core.CouchbaseTemplate.doPersist(CouchbaseTemplate.java:603)
    at org.springframework.data.couchbase.core.CouchbaseTemplate.insert(CouchbaseTemplate.java:283)
    at org.springframework.data.couchbase.core.CouchbaseTemplate.insert(CouchbaseTemplate.java:277)
    at com.lws.orderauditservice.service.CouchbaseService.saveAudits(CouchbaseService.java:54)
    at com.lws.orderauditservice.service.KafkaOrderAuditConsumerService.receiveAuditData(KafkaOrderAuditConsumerService.java:28)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189)
    at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:119)
    at org.springframework.kafka.listener.adapter.HandlerAdapter.invoke(HandlerAdapter.java:48)
    at org.springframework.kafka.listener.adapter.MessagingMessageListenerAdapter.invokeHandler(MessagingMessageListenerAdapter.java:283)
    at org.springframework.kafka.listener.adapter.RecordMessagingMessageListenerAdapter.onMessage(RecordMessagingMessageListenerAdapter.java:80)
    at org.springframework.kafka.listener.adapter.RecordMessagingMessageListenerAdapter.onMessage(RecordMessagingMessageListenerAdapter.java:51)
    at org.springframework.kafka.listener.adapter.RetryingMessageListenerAdapter.lambda$onMessage$0(RetryingMessageListenerAdapter.java:120)
    at org.springframework.retry.support.RetryTemplate.doExecute(RetryTemplate.java:287)
    at org.springframework.retry.support.RetryTemplate.execute(RetryTemplate.java:211)
    at org.springframework.kafka.listener.adapter.RetryingMessageListenerAdapter.onMessage(RetryingMessageListenerAdapter.java:114)
    at org.springframework.kafka.listener.adapter.RetryingMessageListenerAdapter.onMessage(RetryingMessageListenerAdapter.java:40)
    at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeRecordListener(KafkaMessageListenerContainer.java:1141)
    at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeWithRecords(KafkaMessageListenerContainer.java:1115)
    at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeRecordListener(KafkaMessageListenerContainer.java:1057)
    at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeListener(KafkaMessageListenerContainer.java:903)
    at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.run(KafkaMessageListenerContainer.java:753)
Caused by: java.lang.RuntimeException: java.util.concurrent.TimeoutException: {"b":"LWS_ORDER_AUDIT","s":"kv","t":2500000,"i":"0x88"}
    at rx.exceptions.Exceptions.propagate(Exceptions.java:57)
    at rx.observables.BlockingObservable.blockForSingle(BlockingObservable.java:463)
    at rx.observables.BlockingObservable.single(BlockingObservable.java:340)
    at com.couchbase.client.java.CouchbaseBucket.insert(CouchbaseBucket.java:320)
    at com.couchbase.client.java.CouchbaseBucket.insert(CouchbaseBucket.java:315)
    at org.springframework.data.couchbase.core.CouchbaseTemplate$11.doInBucket(CouchbaseTemplate.java:634)
    ... 30 more
Caused by: java.util.concurrent.TimeoutException: {"b":"LWS_ORDER_AUDIT","s":"kv","t":2500000,"i":"0x88"}
    at com.couchbase.client.java.bucket.api.Utils$1.call(Utils.java:131)
    at com.couchbase.client.java.bucket.api.Utils$1.call(Utils.java:127)
    at rx.internal.operators.OperatorOnErrorResumeNextViaFunction$4.onError(OperatorOnErrorResumeNextViaFunction.java:140)
    at rx.internal.operators.OnSubscribeTimeoutTimedWithFallback$TimeoutMainSubscriber.onTimeout(OnSubscribeTimeoutTimedWithFallback.java:166)
    at rx.internal.operators.OnSubscribeTimeoutTimedWithFallback$TimeoutMainSubscriber$TimeoutTask.call(OnSubscribeTimeoutTimedWithFallback.java:191)
    at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    ... 1 more

我认为为org.springframework.dao.TransientDataAccessException异常定义重试策略可以解决我的问题，但确实有帮助。

有人可以在如何处理我的应用程序中所有与网络临时相关的问题并寻求重试机制方面指导我吗？

使用Spring Data Couchbase处理瞬态异常

0 个答案: