“Selector loop waiting on select” when running mul

Question

I'm using wiremock for mocking a web service. I'm using that to provide a service access to some of units that we are testing. So basically we have multiple junit tests which use stubs from wiremock.

But when we run multiple tests at once (let's say run a whole test.java file) it will keep waiting after it completed some of the test cases. And something like following will be displayed at the bottom of the log,

[qtp1669854350-14-selector-ServerConnectorManager@62dfb098/0]
 DEBUG org.eclipse.jetty.io.SelectorManager - Selector loop waiting on select

Junit version : 4.12
Wiremock version : 2.5.0 (wiremock-standalone)
Java version : 1.8.0_77

Also I checked this SO problem. But still can't figure out how to overcome this.

Answer 1

That message is probably a red herring. I suggest grabbing a thread dump during a pause (kill -3 on *nix). That will tell you where exactly the code is blocking.