Debug build.

Author: trivialfis

appveyor.yml

@@ -94,7 +94,7 @@ build_script:
         cmake .. -G"%generator%" -DCMAKE_CONFIGURATION_TYPES="Release" -DR_LIB=ON &&
         cmake --build . --target install --config Release
       )
-    - if /i "%target%" == "jvm" cd jvm-packages && mvn test -pl :xgboost4j_2.12
+    - if /i "%target%" == "jvm" cd jvm-packages && mvn -e -X test -pl :xgboost4j_2.12
 
 test_script:
     - cd %APPVEYOR_BUILD_FOLDER%

jvm-packages/create_jni.py

@@ -20,6 +20,7 @@
     "USE_S3": "OFF",
 
     "USE_CUDA": "OFF",
+    'CMAKE_BUILD_TYPE': 'Debug',
     "JVM_BINDINGS": "ON"
 }
 
@@ -95,7 +96,7 @@ def normpath(path):
                 args.append("-DRABIT_MOCK:BOOL=ON")
 
             run("cmake .. " + " ".join(args) + maybe_generator)
-            run("cmake --build . --config Release" + maybe_parallel_build)
+            run("cmake --build . --config Debug" + maybe_parallel_build)
 
         with cd("demo/regression"):
             run(sys.executable + " mapfeat.py")