couchbase 报 The Content of this Observable is already released. Subscribe earlier or tune the Couch

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严重: StandardWrapper.Throwable
java.lang.RuntimeException: java.util.concurrent.TimeoutException
at com.couchbase.client.java.util.Blocking.blockForSingle(Blocking.java:75)
at com.couchbase.client.java.CouchbaseCluster.openBucket(CouchbaseCluster.java:296)
at com.couchbase.client.java.CouchbaseCluster.openBucket(CouchbaseCluster.java:277)
at com.couchbase.client.java.CouchbaseCluster.openBucket(CouchbaseCluster.java:266)

at com.couchbase.client.java.CouchbaseCluster.openBucket(CouchbaseCluster.java:256)

...

2016-3-16 12:11:02 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet springServlet threw exception
java.lang.IllegalStateException: The Content of this Observable is already released. Subscribe earlier or tune the CouchbaseEnvironment#autoreleaseAfter() setting.
at com.couchbase.client.core.utils.UnicastAutoReleaseSubject$OnSubscribeAction.call(UnicastAutoReleaseSubject.java:230)
at com.couchbase.client.core.utils.UnicastAutoReleaseSubject$OnSubscribeAction.call(UnicastAutoReleaseSubject.java:202)
at rx.Observable$2.call(Observable.java:162)
at rx.Observable$2.call(Observable.java:154)
at rx.Observable$2.call(Observable.java:162)
at rx.Observable$2.call(Observable.java:154)
at rx.Observable$2.call(Observable.java:162)
at rx.Observable$2.call(Observable.java:154)
at rx.Observable$2.call(Observable.java:162)
at rx.Observable$2.call(Observable.java:154)
at rx.Observable.unsafeSubscribe(Observable.java:8171)
at rx.internal.operators.OperatorZip$Zip.start(OperatorZip.java:212)
at rx.internal.operators.OperatorZip$ZipSubscriber.onNext(OperatorZip.java:154)
at rx.internal.operators.OperatorZip$ZipSubscriber.onNext(OperatorZip.java:119)
at rx.internal.util.ScalarSynchronousObservable$1.call(ScalarSynchronousObservable.java:46)
at rx.internal.util.ScalarSynchronousObservable$1.call(ScalarSynchronousObservable.java:35)
at rx.Observable$2.call(Observable.java:162)
at rx.Observable$2.call(Observable.java:154)
at rx.Observable.unsafeSubscribe(Observable.java:8171)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:231)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:140)
at rx.internal.operators.OperatorMap$1.onNext(OperatorMap.java:54)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emitScalar(OperatorMerge.java:472)
at rx.internal.operators.OperatorMerge$MergeSubscriber.tryEmit(OperatorMerge.java:434)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:227)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:140)
at rx.internal.operators.OperatorMap$1.onNext(OperatorMap.java:54)
at rx.observers.Subscribers$5.onNext(Subscribers.java:234)
at rx.subjects.SubjectSubscriptionManager$SubjectObserver.onNext(SubjectSubscriptionManager.java:222)
at rx.subjects.AsyncSubject.onCompleted(AsyncSubject.java:101)
at com.couchbase.client.core.endpoint.AbstractGenericHandler$1.call(AbstractGenericHandler.java:265)
at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:98)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:207)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)

研究了好久终于知道原因：

Couchbase连接服务端的时候会进行cdn解析，解析操作非常慢，比如我们输入192.168.8.8等内网地址也会先进行解析，解析不到才会再用ip地址连接，目前我用的版本是4.1的版本，不知道后续版本中是否会解决这个问题，临时解决方案就是在客户端机器上修改hosts文件，加入 192.168.8.8 192.168.8.8的映射，这样CB在解析的时候就可以直接找到这个地址，问题解决。

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