Calling behaviour more than expected number of times does not assert failure when the call is from multple threads

If i expect a method on a mock to be called once, but call it twice from two different threads (once per thread), easymock does not fail the tests.

If i start two threads, but make two calls from one of them ( uncomment line 97 of ExpirationServiceImpl ) it correctly fails the test.

To demonstrate, untar and 'mvn test' the attached project.

carteda@foobar:/c/dev/workspaces/two/fitp-aggregator/expirationservice$ mvn clean test

[...]

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T E S T S
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Running com.nomura.fitp.expirationservice.ExpirationServiceTest
Exception in thread "Thread-1" java.lang.AssertionError:
Unexpected method call ExpirationHandler.handleExpiration(ExpirableTrade [expireTime=1328117827669, tradeId=already expired, tradeVersion=1, originalExpireTime=1328117857800]):
ExpirationHandler.handleExpiration(ExpirableTrade [expireTime=1328117827669, tradeId=already expired, tradeVersion=1, originalExpireTime=0]): expected: 1, actual: 2
ExpirationHandler.handleExpiration(ExpirableTrade [expireTime=1328117828269, tradeId=soon expired, tradeVersion=1, originalExpireTime=0]): expected: 1, actual: 0
at org.easymock.internal.MockInvocationHandler.invoke(MockInvocationHandler.java:44)
at org.easymock.internal.ObjectMethodsFilter.invoke(ObjectMethodsFilter.java:85)
at $Proxy6.handleExpiration(Unknown Source)
at com.nomura.fitp.expirationservice.internal.ExpirationServiceImpl$Retrier.run(ExpirationServiceImpl.java:120)
at java.lang.Thread.run(Thread.java:662)
Tests run: 4, Failures: 0, Errors: 0, Skipped: 3, Time elapsed: 0.579 sec

Results :

Tests run: 4, Failures: 0, Errors: 0, Skipped: 3

[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------