blueflood: Maven build tests fail on Ubuntu 16.04 with OpenJDK 1.8

Good morning,

The tests on blueflood masterbranch are not passing on my machine when running mvn test -X integration-test.

testConfigTtl_valid(com.rackspacecloud.blueflood.cache.ConfigTtlProviderTest)  Time elapsed: 0.009 sec  <<< ERROR!
java.lang.IllegalStateException: Optional.get() cannot be called on an absent value
        at com.rackspacecloud.blueflood.cache.ConfigTtlProviderTest.testConfigTtl_valid(ConfigTtlProviderTest.java:50)

testConfigTtlForStrings(com.rackspacecloud.blueflood.cache.ConfigTtlProviderTest)  Time elapsed: 0 sec  <<< FAILURE!
java.lang.AssertionError
        at com.rackspacecloud.blueflood.cache.ConfigTtlProviderTest.testConfigTtlForStrings(ConfigTtlProviderTest.java:61)

Running com.rackspacecloud.blueflood.cache.SafetyTtlProviderTest
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.003 sec - in com.rackspacecloud.blueflood.cache.SafetyTtlProviderTest
Running com.rackspacecloud.blueflood.cache.CombinedTtlProviderTest
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0 sec - in com.rackspacecloud.blueflood.cache.CombinedTtlProviderTest
Running com.rackspacecloud.blueflood.cache.LocatorCacheTest
Tests run: 10, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 18.011 sec - in com.rackspacecloud.blueflood.cache.LocatorCacheTest

Results :

Failed tests:
  ConfigTtlProviderTest.testConfigTtlForStrings:61
Tests in error:
  ConfigTtlProviderTest.testConfigTtl_valid:50 » IllegalState Optional.get() can...

Tests run: 734, Failures: 1, Errors: 1, Skipped: 0

Disabling (commenting out actually) of the com.rackspacecloud.blueflood.cache.ConfigTtlProviderTest.testConfigTtl_valid and com.rackspacecloud.blueflood.cache.ConfigTtlProviderTest.testConfigTtlForStrings works (of course) and maven finishes the blueflood-core tests without problems.

This smells like a Java 8 upgrading issue, because it is about Optionals, i think.

Specs:

Description:    Ubuntu 16.04.2 LTS
Release:        16.04
Codename:       xenial
Apache Maven 3.3.9
Maven home: /usr/share/maven
Java version: 1.8.0_121, vendor: Oracle Corporation
Java home: /usr/lib/jvm/java-8-openjdk-amd64/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "4.4.0-75-generic", arch: "amd64", family: "unix"
openjdk version "1.8.0_121"
OpenJDK Runtime Environment (build 1.8.0_121-8u121-b13-0ubuntu1.16.04.2-b13)
OpenJDK 64-Bit Server VM (build 25.121-b13, mixed mode)

I’m looking into it myself right now, but are not yet familiar with the code myself, nor with Optionals. I’ll post a fix if I find one, but if somebody knows a fix already, please comment.