Flaky-test: TransactionBufferClientTest.testAbortOnTopic

[labuladong]

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Example failure

https://github.com/apache/pulsar/actions/runs/3581022993/jobs/6023785340#step:10:817

Exception stacktrace

Full exception stacktrace

Error:  Tests run: 57, Failures: 1, Errors: 0, Skipped: 55, Time elapsed: 70.181 s <<< FAILURE! - in org.apache.pulsar.broker.transaction.buffer.TransactionBufferClientTest
  Error:  testAbortOnTopic(org.apache.pulsar.broker.transaction.buffer.TransactionBufferClientTest)  Time elapsed: 3.345 s  <<< FAILURE!
  java.util.concurrent.ExecutionException: org.apache.pulsar.client.api.transaction.TransactionBufferClientException$RequestTimeoutException: Transaction buffer request timeout.
    at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:396)
    at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2073)
    at org.apache.pulsar.broker.transaction.buffer.TransactionBufferClientTest.testAbortOnTopic(TransactionBufferClientTest.java:126)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:568)
    at org.testng.internal.invokers.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:139)
    at org.testng.internal.invokers.InvokeMethodRunnable.runOne(InvokeMethodRunnable.java:47)
    at org.testng.internal.invokers.InvokeMethodRunnable.call(InvokeMethodRunnable.java:76)
    at org.testng.internal.invokers.InvokeMethodRunnable.call(InvokeMethodRunnable.java:11)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
    at java.base/java.lang.Thread.run(Thread.java:[833](https://github.com/apache/pulsar/actions/runs/3581022993/jobs/6023785340#step:10:834))
  Caused by: org.apache.pulsar.client.api.transaction.TransactionBufferClientException$RequestTimeoutException: Transaction buffer request timeout.
    at org.apache.pulsar.broker.transaction.buffer.impl.TransactionBufferHandlerImpl.lambda$endTxn$0(TransactionBufferHandlerImpl.java:140)
    at io.netty.util.HashedWheelTimer$HashedWheelTimeout.run(HashedWheelTimer.java:715)
    at io.netty.util.concurrent.ImmediateExecutor.execute(ImmediateExecutor.java:34)
    at io.netty.util.HashedWheelTimer$HashedWheelTimeout.expire(HashedWheelTimer.java:703)
    at io.netty.util.HashedWheelTimer$HashedWheelBucket.expireTimeouts(HashedWheelTimer.java:790)
    at io.netty.util.HashedWheelTimer$Worker.run(HashedWheelTimer.java:503)
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
    ... 1 more

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