CheckExitCalled exception

Exception:

org.junit.contrib.java.lang.system.internal.CheckExitCalled: Tried to exit with status 0.

at org.junit.contrib.java.lang.system.internal.NoExitSecurityManager.checkExit(NoExitSecurityManager.java:24)

at java.base/java.lang.Runtime.exit(Runtime.java:111)

at java.base/java.lang.System.exit(System.java:1785)

at example.InputStats.countInput(InputStats.java:23)

at example.InputStatsTest.testCountInput2(InputStatsTest.java:60)

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.base/java.lang.reflect.Method.invoke(Method.java:567)

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.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)

at org.junit.contrib.java.lang.system.ExpectedSystemExit$1.evaluate(ExpectedSystemExit.java:130)

at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)

at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)

at org.junit.contrib.java.lang.system.internal.LogPrintStream$1$1.evaluate(LogPrintStream.java:30)

at org.junit.contrib.java.lang.system.internal.PrintStreamHandler$3.evaluate(PrintStreamHandler.java:48)

at org.junit.contrib.java.lang.system.internal.LogPrintStream$1.evaluate(LogPrintStream.java:26)

at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:298)

at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:292)

at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)

at java.base/java.lang.Thread.run(Thread.java:830)

Lenskit: Popular items evaluation exception solution

In Lenskit 2.2.1 in evaluation when algorithms get to rank popular items the framework throws exception. The problem has been reported to the authors of Lenskit and it will be fixed soon. In this post I offer a workaround for this problem for those who use version 2.2.1.