[ 
https://issues.apache.org/jira/browse/FLINK-8040?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Gary Yao updated FLINK-8040:
----------------------------
    Description: 
Test {{ResourceGuard#testCloseBlockIfAcquired()}} fails sporadically with 
{noformat}
java.io.IOException: Resource guard was already closed.

        at 
org.apache.flink.util.ResourceGuard.acquireResource(ResourceGuard.java:72)
        at 
org.apache.flink.util.ResourceGuardTest.testCloseBlockIfAcquired(ResourceGuardTest.java:74)
        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:50)
        at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
        at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
        at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
        at org.junit.rules.RunRules.evaluate(RunRules.java:20)
{noformat}

*How to reproduce*
Run the test with a high number of iterations.
To further provoke a failure, add {{Thread.sleep(100)}} before the following 
line
{code}
ResourceGuard.Lease lease_2 = resourceGuard.acquireResource();
{code}

This will more likely result in {{closed}} being {{true}} at the time the 2nd 
lease is acquired, and and exception is thrown:
{code}
        if (closed) {
                throw new IOException("Resource guard was already closed.");
        }
{code}

  was:
Test {{ResourceGuard#testCloseBlockIfAcquired()}} fails sporadically with 
{noformat}
java.io.IOException: Resource guard was already closed.

        at 
org.apache.flink.util.ResourceGuard.acquireResource(ResourceGuard.java:72)
        at 
org.apache.flink.util.ResourceGuardTest.testCloseBlockIfAcquired(ResourceGuardTest.java:74)
        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:50)
        at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
        at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
        at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
        at org.junit.rules.RunRules.evaluate(RunRules.java:20)
{noformat}

*How to reproduce*
Run the test with a high number of iterations.
To further provoke the failure, add {{Thread.sleep(100)}} before the following 
line
{code}
ResourceGuard.Lease lease_2 = resourceGuard.acquireResource();
{code}

This will more likely result in {{closed}} being {{true}} at the time the 2nd 
lease is acquired, and and exception is thrown:
{code}
        if (closed) {
                throw new IOException("Resource guard was already closed.");
        }
{code}


> Test instability ResourceGuard#testCloseBlockIfAcquired
> -------------------------------------------------------
>
>                 Key: FLINK-8040
>                 URL: https://issues.apache.org/jira/browse/FLINK-8040
>             Project: Flink
>          Issue Type: Bug
>          Components: Core, Tests
>    Affects Versions: 1.4.0, 1.5.0
>            Reporter: Gary Yao
>              Labels: test-stability
>             Fix For: 1.4.0, 1.5.0
>
>
> Test {{ResourceGuard#testCloseBlockIfAcquired()}} fails sporadically with 
> {noformat}
> java.io.IOException: Resource guard was already closed.
>       at 
> org.apache.flink.util.ResourceGuard.acquireResource(ResourceGuard.java:72)
>       at 
> org.apache.flink.util.ResourceGuardTest.testCloseBlockIfAcquired(ResourceGuardTest.java:74)
>       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:50)
>       at 
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
>       at 
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
>       at 
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
>       at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
>       at org.junit.rules.RunRules.evaluate(RunRules.java:20)
> {noformat}
> *How to reproduce*
> Run the test with a high number of iterations.
> To further provoke a failure, add {{Thread.sleep(100)}} before the following 
> line
> {code}
> ResourceGuard.Lease lease_2 = resourceGuard.acquireResource();
> {code}
> This will more likely result in {{closed}} being {{true}} at the time the 2nd 
> lease is acquired, and and exception is thrown:
> {code}
>       if (closed) {
>               throw new IOException("Resource guard was already closed.");
>       }
> {code}



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