flake: StreamingDataflowWorkerTest.testNumberOfWorkerHarnessThreadsIsHonored

org.apache.beam.runners.dataflow.worker.StreamingDataflowWorkerTest.testNumberOfWorkerHarnessThreadsIsHonored[1: [streamingEngine=true]]

org.junit.runners.model.TestTimedOutException: test timed out after 10000 milliseconds
at java.io.FileInputStream.readBytes(Native Method)
at java.io.FileInputStream.read(FileInputStream.java:255)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:284)
at java.io.BufferedInputStream.read(BufferedInputStream.java:345)
at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:284)
at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:326)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)
at java.io.InputStreamReader.read(InputStreamReader.java:184)
at java.io.BufferedReader.fill(BufferedReader.java:161)
at java.io.BufferedReader.readLine(BufferedReader.java:324)
at java.io.BufferedReader.readLine(BufferedReader.java:389)
at java.io.BufferedReader$1.hasNext(BufferedReader.java:571)
at java.util.Iterator.forEachRemaining(Iterator.java:115)
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:566)
at org.apache.beam.runners.dataflow.options.DefaultGcpRegionFactory.getRegionFromGcloudCli(DefaultGcpRegionFactory.java:85)
at org.apache.beam.runners.dataflow.options.DefaultGcpRegionFactory.create(DefaultGcpRegionFactory.java:54)
at org.apache.beam.runners.dataflow.options.DefaultGcpRegionFactory.create(DefaultGcpRegionFactory.java:39)
at org.apache.beam.sdk.options.ProxyInvocationHandler.returnDefaultHelper(ProxyInvocationHandler.java:611)
at org.apache.beam.sdk.options.ProxyInvocationHandler.getDefault(ProxyInvocationHandler.java:552)
at org.apache.beam.sdk.options.ProxyInvocationHandler.invoke(ProxyInvocationHandler.java:169)
at com.sun.proxy.$Proxy132.getRegion(Unknown Source)
at org.apache.beam.runners.dataflow.worker.status.DebugCapture$Manager.<init>(DebugCapture.java:123)
at org.apache.beam.runners.dataflow.worker.StreamingDataflowWorker.<init>(StreamingDataflowWorker.java:630)
at org.apache.beam.runners.dataflow.worker.StreamingDataflowWorkerTest.makeWorker(StreamingDataflowWorkerTest.java:698)
at org.apache.beam.runners.dataflow.worker.StreamingDataflowWorkerTest.testNumberOfWorkerHarnessThreadsIsHonored(StreamingDataflowWorkerTest.java:1002)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:288)
at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:282)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.lang.Thread.run(Thread.java:748)

https://ci-beam.apache.org/job/beam_PreCommit_Java_Commit/20742/testReport/junit/org.apache.beam.runners.dataflow.worker/StreamingDataflowWorkerTest/testNumberOfWorkerHarnessThreadsIsHonored_1___streamingEngine_true___2/