diff --git a/etl/src/main/java/edu/harvard/hms/dbmi/avillach/hpds/etl/genotype/GenomicDatasetMerger.java b/etl/src/main/java/edu/harvard/hms/dbmi/avillach/hpds/etl/genotype/GenomicDatasetMerger.java
index e66f0c30..88b4fd14 100644
--- a/etl/src/main/java/edu/harvard/hms/dbmi/avillach/hpds/etl/genotype/GenomicDatasetMerger.java
+++ b/etl/src/main/java/edu/harvard/hms/dbmi/avillach/hpds/etl/genotype/GenomicDatasetMerger.java
@@ -118,7 +118,8 @@ public Map<String, FileBackedByteIndexedInfoStore> mergeVariantIndexes() throws
         if (!infoStores1.keySet().equals(infoStores2.keySet())) {
             throw new IllegalStateException("Info stores do not match");
         }
-        for (Map.Entry<String, FileBackedByteIndexedInfoStore> infoStores1Entry : infoStores1.entrySet()) {
+        //for (Map.Entry<String, FileBackedByteIndexedInfoStore> infoStores1Entry : infoStores1.entrySet()) {
+        infoStores1.entrySet().parallelStream().forEach(infoStores1Entry -> {
             FileBackedByteIndexedInfoStore infoStore2 = infoStores2.get(infoStores1Entry.getKey());
 
             FileBackedByteIndexedStorage<String, Integer[]> allValuesStore1 = infoStores1Entry.getValue().getAllValues();
@@ -137,9 +138,14 @@ public Map<String, FileBackedByteIndexedInfoStore> mergeVariantIndexes() throws
 
             InfoStore infoStore = new InfoStore(infoStore2.description, null, infoStores1Entry.getKey());
             infoStore.allValues = mergedInfoStoreValues;
-            FileBackedByteIndexedInfoStore mergedStore = new FileBackedByteIndexedInfoStore(new File(outputDirectory), infoStore);
+            FileBackedByteIndexedInfoStore mergedStore = null;
+            try {
+                mergedStore = new FileBackedByteIndexedInfoStore(new File(outputDirectory), infoStore);
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            }
             mergedInfoStores.put(infoStores1Entry.getKey(), mergedStore);
-        }
+        });
 
         mergedVariantStore.setVariantSpecIndex(variantSpecList.toArray(new String[0]));
         return mergedInfoStores;
@@ -161,7 +167,7 @@ private String[] mergePatientIds() {
      */
     public Map<String, FileBackedJsonIndexStorage<Integer, ConcurrentHashMap<String, VariantMasks>>> mergeChromosomeMasks() {
         Map<String, FileBackedJsonIndexStorage<Integer, ConcurrentHashMap<String, VariantMasks>>> mergedMaskStorage = new ConcurrentHashMap<>();
-        variantStore1.getVariantMaskStorage().keySet().parallelStream().forEach(chromosome -> {
+        variantStore1.getVariantMaskStorage().keySet().forEach(chromosome -> {
             try {
                 mergedMaskStorage.put(chromosome, mergeChromosomeMask(chromosome));
             } catch (FileNotFoundException e) {
@@ -218,7 +224,7 @@ public FileBackedJsonIndexStorage<Integer, ConcurrentHashMap<String, VariantMask
         FileBackedJsonIndexStorage<Integer, ConcurrentHashMap<String, VariantMasks>> variantMaskStorage2 = variantStore2.getVariantMaskStorage().get(chromosome);
 
         FileBackedJsonIndexStorage<Integer, ConcurrentHashMap<String, VariantMasks>> merged = new FileBackedStorageVariantMasksImpl(new File(outputDirectory + chromosome + "masks.bin"));
-        variantMaskStorage1.keys().forEach(key -> {
+        variantMaskStorage1.keys().parallelStream().forEach(key -> {
             Map<String, VariantMasks> masks1 = variantMaskStorage1.get(key);
             Map<String, VariantMasks> masks2 = variantMaskStorage2.get(key);
             if (masks2 == null) {
diff --git a/processing/src/main/java/edu/harvard/hms/dbmi/avillach/hpds/processing/GenomicProcessorConfig.java b/processing/src/main/java/edu/harvard/hms/dbmi/avillach/hpds/processing/GenomicProcessorConfig.java
index ba3e5109..baf1a4c1 100644
--- a/processing/src/main/java/edu/harvard/hms/dbmi/avillach/hpds/processing/GenomicProcessorConfig.java
+++ b/processing/src/main/java/edu/harvard/hms/dbmi/avillach/hpds/processing/GenomicProcessorConfig.java
@@ -5,15 +5,11 @@
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.PropertySource;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 import reactor.core.scheduler.Schedulers;
 
-import java.util.ArrayList;
 import java.util.List;
-import java.util.stream.Collectors;
-import java.util.stream.IntStream;
 
 @SpringBootApplication
 public class GenomicProcessorConfig {