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https://issues.apache.org/jira/browse/BEAM-9187?focusedWorklogId=518261&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-518261
 ]

ASF GitHub Bot logged work on BEAM-9187:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 01/Dec/20 03:23
            Start Date: 01/Dec/20 03:23
    Worklog Time Spent: 10m 
      Work Description: TheNeuralBit commented on a change in pull request 
#13448:
URL: https://github.com/apache/beam/pull/13448#discussion_r533048304



##########
File path: 
runners/java-fn-execution/src/test/java/org/apache/beam/runners/fnexecution/control/DefaultJobBundleFactoryTest.java
##########
@@ -459,27 +461,28 @@ public void loadBalancesBundles() throws Exception {
       verify(envFactory, Mockito.times(2)).createEnvironment(eq(environment), 
any());
 
       long tms = System.currentTimeMillis();
-      AtomicBoolean closed = new AtomicBoolean();
-      // close to free up environment for another bundle
-      TimerTask closeBundleTask =
-          new TimerTask() {
-            @Override
-            public void run() {
-              try {
-                b2.close();
-                closed.set(true);
-              } catch (Exception e) {
-                throw new RuntimeException(e);
-              }
-            }
-          };
-      new Timer().schedule(closeBundleTask, 100);
-
+      ScheduledExecutorService executor = 
Executors.newSingleThreadScheduledExecutor();
+      ScheduledFuture<Optional<Exception>> closingFuture =
+          executor.schedule(
+              () -> {
+                try {
+                  b2.close();
+                  return Optional.empty();
+                } catch (Exception e) {

Review comment:
       Hm could it be that Future only does that for unchecked exceptions? I 
had tried just making this `executor.schedule(b2::close, ..)` but it produces a 
compile error:
   ```
   incompatible thrown types Exception in method reference
   ```




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Issue Time Tracking
-------------------

    Worklog Id:     (was: 518261)
    Time Spent: 0.5h  (was: 20m)

> org.apache.beam.runners.fnexecution.control.DefaultJobBundleFactoryTest.loadBalancesBundles
>  is flaky
> ----------------------------------------------------------------------------------------------------
>
>                 Key: BEAM-9187
>                 URL: https://issues.apache.org/jira/browse/BEAM-9187
>             Project: Beam
>          Issue Type: Test
>          Components: runner-core
>            Reporter: Etienne Chauchot
>            Assignee: Brian Hulette
>            Priority: P1
>              Labels: flake, flaky-test
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> [org.apache.beam.runners.fnexecution.control.DefaultJobBundleFactoryTest.loadBalancesBundles|https://builds.apache.org/job/beam_PreCommit_Java_Commit/9730/testReport/junit/org.apache.beam.runners.fnexecution.control/DefaultJobBundleFactoryTest/loadBalancesBundles/]
>  UTest seem to be flaky: 
> [https://builds.apache.org/job/beam_PreCommit_Java_Commit/9730/testReport/junit/org.apache.beam.runners.fnexecution.control/DefaultJobBundleFactoryTest/loadBalancesBundles/]
>  
> I have runner-core as tag but in reality this test is in 
> org.apache.beam.runners.fnexecution.control but there is no corresponding tag



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