Hi,
I have external machine that insert a document on my Couchbase cluster (with java sdk).
For a few minute one server node of the cluster was down (reboot for upgrade hw) and the log reported this exception:
18:09:41.910 [RxComputationScheduler-2] WARN Endpoint: [couchbase01-xxx/xxx:11210][KeyValueEndpoint]: Could not connect to endpoint, retrying with delay 4096 MILLISECONDS:
com.couchbase.client.deps.io.netty.channel.ConnectTimeoutException: Connect callback did not return, hit safeguarding timeout.
at com.couchbase.client.core.endpoint.AbstractEndpoint$3.call(AbstractEndpoint.java:317) ~[core-io-1.3.6.jar:na]
at com.couchbase.client.core.endpoint.AbstractEndpoint$3.call(AbstractEndpoint.java:310) ~[core-io-1.3.6.jar:na]
at rx.internal.operators.SingleOperatorOnErrorResumeNext$2.onError(SingleOperatorOnErrorResumeNext.java:69) [rxjava-1.1.8.jar:1.1.8]
at rx.Single$18.onError(Single.java:1883) [rxjava-1.1.8.jar:1.1.8]
at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:152) [rxjava-1.1.8.jar:1.1.8]
at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:115) [rxjava-1.1.8.jar:1.1.8]
at rx.observers.SerializedObserver.onError(SerializedObserver.java:153) [rxjava-1.1.8.jar:1.1.8]
at rx.observers.SerializedSubscriber.onError(SerializedSubscriber.java:78) [rxjava-1.1.8.jar:1.1.8]
at rx.internal.operators.OperatorTimeoutBase$TimeoutSubscriber$1.onError(OperatorTimeoutBase.java:187) [rxjava-1.1.8.jar:1.1.8]
at rx.Single$1$1.onError(Single.java:85) [rxjava-1.1.8.jar:1.1.8]
at rx.Single$3.call(Single.java:505) [rxjava-1.1.8.jar:1.1.8]
at rx.Single$3.call(Single.java:501) [rxjava-1.1.8.jar:1.1.8]
at rx.Single$1.call(Single.java:90) [rxjava-1.1.8.jar:1.1.8]
at rx.Single$1.call(Single.java:70) [rxjava-1.1.8.jar:1.1.8]
at rx.Observable.unsafeSubscribe(Observable.java:9861) [rxjava-1.1.8.jar:1.1.8]
at rx.internal.operators.OperatorTimeoutBase$TimeoutSubscriber.onTimeout(OperatorTimeoutBase.java:200) [rxjava-1.1.8.jar:1.1.8]
at rx.internal.operators.OperatorTimeout$1$1.call(OperatorTimeout.java:41) [rxjava-1.1.8.jar:1.1.8]
at rx.internal.schedulers.EventLoopsScheduler$EventLoopWorker$2.call(EventLoopsScheduler.java:189) [rxjava-1.1.8.jar:1.1.8]
at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55) [rxjava-1.1.8.jar:1.1.8]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [na:1.7.0_51]
at java.util.concurrent.FutureTask.run(FutureTask.java:262) [na:1.7.0_51]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178) [na:1.7.0_51]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292) [na:1.7.0_51]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_51]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_51]
at java.lang.Thread.run(Thread.java:744) [na:1.7.0_51]
I think it’s normal, but the is problem that exception has blocked my external machine and I had to restart it.