Exceptions on Reason: 'timeout' and 'null'

まだ誰も着手していません。

Hi there,
There are some ‘timeout’ errors as follows when I run a Java Spring program with influxdb-client-java. Could someone tell me how to fix these errors? Thanks a lot.

__Steps to reproduce:__
List the minimal actions needed to reproduce the behavior.
1. setup InfluxDB version 2.7.1 on cloud VM;
2. setup a Java Spring program with Influxdb-client-java version 6.7.0;
3. setup the influx.writeTimeout = 15S;
4. write a lot of data to InfluxDB with this program;
5. run this program for at last a week, there are some 'timeout' and 'null' erros:

__Expected behavior:__
There are no 'timeout' or 'null' errors.

__Actual behavior:__
there are some 'timeout' and 'null' erros:

error logs

```
2023-06-24 17:00:15,715 WARN [RxNewThreadScheduler-1] com.influxdb.client.write.events.WriteRetriableErrorEvent: The retriable error occurred during writing of data. Reason: 'timeout'. Retry in: 18.225s.
2023-06-24 17:00:44,143 WARN [RxNewThreadScheduler-463230] com.influxdb.client.write.events.WriteRetriableErrorEvent: The retriable error occurred during writing of data. Reason: 'timeout'. Retry in: 37.234s.
2023-06-24 17:01:21,714 WARN [RxNewThreadScheduler-463231] com.influxdb.client.write.events.WriteRetriableErrorEvent: The retriable error occurred during writing of data. Reason: 'null'. Retry in: 50.281s.
2023-06-24 17:02:12,110 WARN [RxNewThreadScheduler-463232] com.influxdb.client.write.events.WriteRetriableErrorEvent: The retriable error occurred during writing of data. Reason: 'null'. Retry in: 85.256s.
2023-06-24 17:03:05,626 ERROR [RxNewThreadScheduler-463229] com.influxdb.client.write.events.WriteErrorEvent: The error occurred during writing of data
com.influxdb.exceptions.InfluxException: Max retry time exceeded.
at com.influxdb.internal.AbstractRestClient.toInfluxException(AbstractRestClient.java:102)
at com.influxdb.client.internal.AbstractWriteClient.lambda$new$8(AbstractWriteClient.java:174)
at io.reactivex.rxjava3.internal.subscribers.LambdaSubscriber.onNext(LambdaSubscriber.java:65)
at io.reactivex.rxjava3.internal.operators.flowable.FlowableDoFinally$DoFinallySubscriber.onNext(FlowableDoFinally.java:85)
at io.reactivex.rxjava3.internal.operators.mixed.FlowableConcatMapMaybe$ConcatMapMaybeSubscriber.drain(FlowableConcatMapMaybe.java:238)
at io.reactivex.rxjava3.internal.operators.mixed.FlowableConcatMapMaybe$ConcatMapMaybeSubscriber.innerSuccess(FlowableConcatMapMaybe.java:119)
at io.reactivex.rxjava3.internal.operators.mixed.FlowableConcatMapMaybe$ConcatMapMaybeSubscriber$ConcatMapMaybeObserver.onSuccess(FlowableConcatMapMaybe.java:276)
at io.reactivex.rxjava3.internal.operators.maybe.MaybeOnErrorNext$OnErrorNextMaybeObserver$NextMaybeObserver.onSuccess(MaybeOnErrorNext.java:122)
at io.reactivex.rxjava3.internal.operators.maybe.MaybeJust.subscribeActual(MaybeJust.java:36)
at io.reactivex.rxjava3.core.Maybe.subscribe(Maybe.java:5375)
at io.reactivex.rxjava3.internal.operators.maybe.MaybeOnErrorNext$OnErrorNextMaybeObserver.onError(MaybeOnErrorNext.java:97)
at io.reactivex.rxjava3.internal.operators.maybe.MaybePeek$MaybePeekObserver.onErrorInner(MaybePeek.java:147)
at io.reactivex.rxjava3.internal.operators.maybe.MaybePeek$MaybePeekObserver.onError(MaybePeek.java:134)
at io.reactivex.rxjava3.internal.operators.maybe.MaybeMap$MapMaybeObserver.onError(MaybeMap.java:95)
at io.reactivex.rxjava3.internal.operators.maybe.MaybeTimeoutMaybe$TimeoutFallbackMaybeObserver.onError(MaybeTimeoutMaybe.java:195)
at io.reactivex.rxjava3.internal.operators.maybe.MaybeError.subscribeActual(MaybeError.java:35)
at io.reactivex.rxjava3.core.Maybe.subscribe(Maybe.java:5375)
at io.reactivex.rxjava3.internal.operators.maybe.MaybeTimeoutMaybe$TimeoutMainMaybeObserver.otherComplete(MaybeTimeoutMaybe.java:133)
at io.reactivex.rxjava3.internal.operators.maybe.MaybeTimeoutMaybe$TimeoutOtherMaybeObserver.onSuccess(MaybeTimeoutMaybe.java:158)
at io.reactivex.rxjava3.internal.operators.maybe.MaybeTimer$TimerDisposable.run(MaybeTimer.java:58)
at io.reactivex.rxjava3.core.Scheduler$DisposeTask.run(Scheduler.java:644)
at io.reactivex.rxjava3.internal.schedulers.ScheduledRunnable.run(ScheduledRunnable.java:65)
at io.reactivex.rxjava3.internal.schedulers.ScheduledRunnable.call(ScheduledRunnable.java:56)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$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$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:750)
Caused by: java.util.concurrent.TimeoutException: Max retry time exceeded.
at com.influxdb.client.internal.AbstractWriteClient$ToWritePointsMaybe.apply(AbstractWriteClient.java:501)
at com.influxdb.client.internal.AbstractWriteClient$ToWritePointsMaybe.apply(AbstractWriteClient.java:432)
at io.reactivex.rxjava3.internal.operators.mixed.FlowableConcatMapMaybe$ConcatMapMaybeSubscriber.drain(FlowableConcatMapMaybe.java:219)
at io.reactivex.rxjava3.internal.operators.mixed.ConcatMapXMainSubscriber.onNext(ConcatMapXMainSubscriber.java:106)
at com.influxdb.client.internal.flowable.BackpressureBatchesBufferStrategy$OnBackpressureBufferStrategySubscriber.drain(BackpressureBatchesBufferStrategy.java:238)
at com.influxdb.client.internal.flowable.BackpressureBatchesBufferStrategy$OnBackpressureBufferStrategySubscriber.onNext(BackpressureBatchesBufferStrategy.java:149)
at com.influxdb.client.internal.flowable.BackpressureBatchesBufferStrategy$OnBackpressureBufferStrategySubscriber.onNext(BackpressureBatchesBufferStrategy.java:54)
at io.reactivex.rxjava3.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.tryEmitScalar(FlowableFlatMap.java:232)
at io.reactivex.rxjava3.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.onNext(FlowableFlatMap.java:150)
at io.reactivex.rxjava3.internal.operators.flowable.FlowableFilter$FilterSubscriber.tryOnNext(FlowableFilter.java:75)
at io.reactivex.rxjava3.internal.operators.flowable.FlowableFilter$FilterSubscriber.onNext(FlowableFilter.java:53)
at io.reactivex.rxjava3.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.tryEmit(FlowableFlatMap.java:270)
at io.reactivex.rxjava3.internal.operators.flowable.FlowableFlatMap$InnerSubscriber.onNext(FlowableFlatMap.java:627)
at io.reactivex.rxjava3.internal.operators.flowable.FlowableMap$MapSubscriber.onNext(FlowableMap.java:69)
at io.reactivex.rxjava3.subscribers.SerializedSubscriber.onNext(SerializedSubscriber.java:103)
at com.influxdb.client.internal.flowable.FlowableBufferTimedFlushable$BufferExactBoundedSubscriber.accept(FlowableBufferTimedFlushable.java:227)
at com.influxdb.client.internal.flowable.FlowableBufferTimedFlushable$BufferExactBoundedSubscriber.accept(FlowableBufferTimedFlushable.java:85)
at io.reactivex.rxjava3.internal.subscribers.QueueDrainSubscriber.fastPathOrderedEmitMax(QueueDrainSubscriber.java:107)
at com.influxdb.client.internal.flowable.FlowableBufferTimedFlushable$BufferExactBoundedSubscriber.run(FlowableBufferTimedFlushable.java:281)
at io.reactivex.rxjava3.core.Scheduler$Worker$PeriodicTask.run(Scheduler.java:543)
... 8 common frames omitted

```

__Specifications:__
- Client Version: Influxdb-client-java 6.7.0
- InfluxDB Version: 2.7.1
- JDK Version: JDK 8
- Platform: Linux

AbstractRestClient.toInfluxException と AbstractWriteClient のスタックトレースのエントリーポイントから始め、writeTimeout と retry 処理によってログに記録される理由がどのように生成されるかを追跡します。記載されている InfluxDB 2.7.1、client 6.7.0、JDK 8、Linux のセットアップを使用して、長時間実行される書き込みワークロードを再現します。timeout と null の結果の原因が確認され、検証済みの修正または文書化された解決策が得られれば完了です。

索引モデルが issue の本文から書いたものです。