Assorted fixes (#466)

* Timeouts and fixes

Signed-off-by: Alex Black <blacka101@gmail.com>

* Increase default timeout to 90s due to slow PPC CI machines

Signed-off-by: Alex Black <blacka101@gmail.com>

* Another timeout tweak

Signed-off-by: Alex Black <blacka101@gmail.com>

* Svhn

Signed-off-by: Alex Black <blacka101@gmail.com>

deeplearning4j/deeplearning4j-common-tests/src/main/java/org/deeplearning4j/BaseDL4JTest.java

@@ -68,7 +68,7 @@ public abstract class BaseDL4JTest {
      * Override this method to set the default timeout for methods in the test class
      */
     public long getTimeoutMilliseconds(){
-        return 60_000;
+        return 90_000;
     }
 
     /**

deeplearning4j/deeplearning4j-core/src/test/java/org/deeplearning4j/datasets/fetchers/SvhnDataFetcherTest.java

@@ -24,17 +24,22 @@ import org.junit.rules.Timeout;
 import java.io.File;
 
 import static org.junit.Assert.assertTrue;
+import static org.junit.Assume.assumeTrue;
 
 /**
  * @author saudet
  */
 public class SvhnDataFetcherTest extends BaseDL4JTest {
 
-    @Rule
-    public Timeout timeout = Timeout.seconds(600);
+    @Override
+    public long getTimeoutMilliseconds() {
+        return 480_000L;    //Shouldn't take this long but slow download or drive access on CI machines may need extra time.
+    }
 
     @Test
     public void testSvhnDataFetcher() throws Exception {
+        assumeTrue(isIntegrationTests());   //Ignore unless integration tests - CI can get caught up on slow disk access
+
         SvhnDataFetcher fetch = new SvhnDataFetcher();
         File path = fetch.getDataSetPath(DataSetType.TRAIN);
         File path2 = fetch.getDataSetPath(DataSetType.TEST);

deeplearning4j/deeplearning4j-core/src/test/java/org/deeplearning4j/optimizer/listener/TestCheckpointListener.java

@@ -183,11 +183,11 @@ public class TestCheckpointListener extends BaseDL4JTest {
 
         CheckpointListener l = new CheckpointListener.Builder(f)
                 .keepLast(3)
-                .saveEvery(4, TimeUnit.SECONDS)
+                .saveEvery(4900, TimeUnit.MILLISECONDS)
                 .build();
         net.setListeners(l);
 
-        for(int i=0; i<5; i++ ){   //10 iterations total
+        for(int i=0; i<3; i++ ){   //10 iterations total
             net.fit(iter);
             Thread.sleep(5000);
         }
@@ -211,9 +211,10 @@ public class TestCheckpointListener extends BaseDL4JTest {
             ns.add(n.getIterationCount());
         }
 
-        assertEquals(3, l.availableCheckpoints().size());
-        assertEquals(ns.toString(), 3, ns.size());
-        assertTrue(ns.containsAll(Arrays.asList(4,6,8)));
+        assertEquals(2, l.availableCheckpoints().size());
+        assertEquals(ns.toString(), 2, ns.size());
+        System.out.println(ns);
+        assertTrue(ns.containsAll(Arrays.asList(2,4)));
     }
 
     @Test

deeplearning4j/deeplearning4j-core/src/test/java/org/deeplearning4j/optimizer/listener/TestListeners.java

@@ -70,6 +70,11 @@ public class TestListeners extends BaseDL4JTest {
     @Rule
     public TemporaryFolder tempDir = new TemporaryFolder();
 
+    @Override
+    public long getTimeoutMilliseconds() {
+        return 90000L;
+    }
+
     @Test
     public void testSettingListenersUnsupervised() {
         //Pretrain layers should get copies of the listeners, in addition to the

deeplearning4j/deeplearning4j-nn/src/main/java/org/deeplearning4j/nn/multilayer/MultiLayerNetwork.java

@@ -767,6 +767,13 @@ public class MultiLayerNetwork implements Serializable, Classifier, Layer, Neura
         if (!isInitCalled())
             init();
 
+        if (solver == null) {
+            try (MemoryWorkspace wsO = Nd4j.getMemoryManager().scopeOutOfWorkspaces()) {
+                solver = new Solver.Builder().configure(conf()).listeners(getListeners()).model(this)
+                        .build();
+            }
+        }
+
         solver.getOptimizer().setGradientsAccumulator(accumulator);
     }
 

deeplearning4j/deeplearning4j-scaleout/spark/dl4j-spark-parameterserver/src/test/java/org/deeplearning4j/spark/parameterserver/train/GradientSharingTrainingTest.java

@@ -75,7 +75,7 @@ public class GradientSharingTrainingTest extends BaseSparkTest {
 
     @Override
     public long getTimeoutMilliseconds() {
-        return 90000L;
+        return 180000L;
     }
 
     @Test

nd4j/nd4j-common-tests/src/main/java/org/nd4j/common/tests/BaseND4JTest.java

@@ -55,7 +55,7 @@ public abstract class BaseND4JTest {
      * Override this method to set the default timeout for methods in the test class
      */
     public long getTimeoutMilliseconds(){
-        return 60_000;
+        return 90_000;
     }
 
     /**