CODEWITHSUNDEEP
javaspringspring-bootspring-cachespring-data-couchbase
mickygo
mickygo

Reputation: 107

spring-data-couchbase throws DocumentDoesNotExistException for non-existent documents

I am using spring-data-couchbase 2.1.2 with spring-boot 1.4.0.RC1 and couchbase-spring-cache

It works fine when caching is disabled as it returns NULL object When caching is enabled and try to find a non-existing document in the bucket it throws an exception:

com.couchbase.client.java.error.DocumentDoesNotExistException: null
    at com.couchbase.client.java.CouchbaseAsyncBucket$22.call(CouchbaseAsyncBucket.java:684) ~[java-client-2.2.8.jar:na]
    at com.couchbase.client.java.CouchbaseAsyncBucket$22.call(CouchbaseAsyncBucket.java:671) ~[java-client-2.2.8.jar:na]
    at rx.internal.operators.OperatorMap$1.onNext(OperatorMap.java:54) ~[rxjava-1.0.17.jar:1.0.17]
    at rx.observers.Subscribers$5.onNext(Subscribers.java:234) ~[rxjava-1.0.17.jar:1.0.17]
    at rx.subjects.SubjectSubscriptionManager$SubjectObserver.onNext(SubjectSubscriptionManager.java:223) ~[rxjava-1.0.17.jar:1.0.17]
    at rx.subjects.AsyncSubject.onCompleted(AsyncSubject.java:101) ~[rxjava-1.0.17.jar:1.0.17]
    at com.couchbase.client.core.endpoint.AbstractGenericHandler.completeResponse(AbstractGenericHandler.java:354) ~[core-io-1.2.9.jar:na]
    at com.couchbase.client.core.endpoint.AbstractGenericHandler.access$000(AbstractGenericHandler.java:72) ~[core-io-1.2.9.jar:na]
    at com.couchbase.client.core.endpoint.AbstractGenericHandler$1.call(AbstractGenericHandler.java:372) ~[core-io-1.2.9.jar:na]
    at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55) ~[rxjava-1.0.17.jar:1.0.17]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) ~[na:1.7.0_80]
    at java.util.concurrent.FutureTask.run(FutureTask.java:262) ~[na:1.7.0_80]
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178) ~[na:1.7.0_80]
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292) ~[na:1.7.0_80]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) ~[na:1.7.0_80]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) ~[na:1.7.0_80]
    at java.lang.Thread.run(Thread.java:745) ~[na:1.7.0_80]
Caused by: rx.exceptions.OnErrorThrowable$OnNextValue: OnError while emitting onNext value: com.couchbase.client.core.message.kv.RemoveResponse.class
    at rx.exceptions.OnErrorThrowable.addValueAsLastCause(OnErrorThrowable.java:109) ~[rxjava-1.0.17.jar:1.0.17]
    at rx.exceptions.Exceptions.throwOrReport(Exceptions.java:188) ~[rxjava-1.0.17.jar:1.0.17]
    at rx.internal.operators.OperatorMap$1.onNext(OperatorMap.java:56) ~[rxjava-1.0.17.jar:1.0.17]
    ... 14 common frames omitted

Is it because of AsyncBucket? Is it possible to disable AsyncBucket?

Source code https://github.com/maverickmicky/spring-couchbase-cache

Upvotes: 3

Views: 1757

Answers (2)

Arpit Aggarwal
Arpit Aggarwal

Reputation: 29266

I am across the same exception and use case is I am caching the resource which return null, for example:

@Override
@Cacheable(value = "EMPLOYEE_", key = "#id")
public Employee getEmployee(int id) {
    return null;
}

And fixed it using the unless attribute of @Cacheable which is available as of Spring 3.2, as follows:

@Override
@Cacheable(value = "EMPLOYEE_", key = "#id", unless = "#result == null")
public Employee getEmployee(int id) {
    return null;
}

Have written an article as well which describe my problem and fix for the same - Fixing com.couchbase.client.java.error.DocumentDoesNotExistException – Couchbase

Upvotes: 1

Simon Baslé
Simon Baslé

Reputation: 28301

This is an issue indeed... As soon as an eviction attempt for a key that isn't in cache is made, the exception will be thrown :(

I've created an issue for this (with work arounds).

edit: To work around the issue, you should be able to declare a CacheErrorHandler that has a handleCacheEvictError method that simply catches DocumentDoesNotExistException. See the documentation section on configuring the cache abstraction here and the CachingConfigurer javadoc.

Upvotes: 5

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