Github user pvillard31 commented on the issue: https://github.com/apache/nifi/pull/1480 @trixpan I just wanted to check before getting this merged but I believe setting the properties like you did does not change the locale settings for surefire plugin (unit tests). The fact is I know there are some tests failing with French locale although the travis build looks OK. There is at least one in: ```` nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-framework-cluster/ ```` This is tracked with NIFI-2683. So I just did some tests: If I run ```` mvn clean install -Duser.language=fr -Duser.region=FR ```` In the above directory, the build is fine. But if I change the parent pom.xml with what I suggested in the JIRA: ```` <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-surefire-plugin</artifactId> <version>2.18</version> <configuration> <includes> <include>**/*Test.class</include> <include>**/Test*.class</include> <include>**/*Spec.class</include> </includes> <redirectTestOutputToFile>true</redirectTestOutputToFile> <argLine combine.children="append">-Xmx1G -Djava.net.preferIPv4Stack=true -Duser.language=fr -Duser.region=FR</argLine> </configuration> <dependencies> <dependency> <!-- Force surefire to use JUnit --> <groupId>org.apache.maven.surefire</groupId> <artifactId>surefire-junit4</artifactId> <version>2.18</version> </dependency> </dependencies> </plugin> ```` and run ```` mvn clean install ```` then I have a test failure: ```` Failed tests: StandardHttpResponseMapperSpec.MergeResponses: #responseEntities.size() HTTP 200 #httpMethod responses for #requestUriPart:122 Condition not satisfied: ```` IIRC the arguments passed along the maven command are not used by surefire plugin which uses its own environment to run unit tests. So here is my proposition, in the parent pom, add an empty property like this: ```` <properties> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> <maven.min-version>3.1.0</maven.min-version> <maven.surefire.arguments/> ... </properties> ```` Then, in the plugin configuration, change the argLine with: ```` <argLine combine.children="append">-Xmx1G -Djava.net.preferIPv4Stack=true ${maven.surefire.arguments}</argLine> ```` This way, there is absolutely no change with the current behavior and the default locale of the system will remain the one used when building. However you can now specify the locale to use with: ```` mvn clean install -Dmaven.surefire.arguments="-Duser.language=fr -Duser.region=FR" ```` And I confirm that the test is failing as "expected". What do you think?
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