Small fixes

Author: ldematte

x-pack/plugin/gpu/build.gradle

@@ -25,9 +25,7 @@ dependencies {
   testImplementation(testArtifact(project(':server')))
   clusterModules project(xpackModule('gpu'))
 }
-tasks.named("yamlRestTest") {
-  usesDefaultDistribution("uses gpu plugin")
-}
+
 artifacts {
   restXpackTests(new File(projectDir, "src/yamlRestTest/resources/rest-api-spec/test"))
 }

x-pack/plugin/gpu/src/main/java/org/elasticsearch/xpack/gpu/GPUSupport.java

@@ -46,7 +46,7 @@ public static CuVSResources cuVSResourcesOrNull(boolean logError) {
                 if (t instanceof ExceptionInInitializerError ex) {
                     t = ex.getCause();
                 }
-                LOG.warn("Exception occurred during creation of cuvs resources. " + t);
+                LOG.warn("Exception occurred during creation of cuvs resources", t);
             }
         }
         return null;

x-pack/plugin/gpu/src/main/java/org/elasticsearch/xpack/gpu/codec/GPUToHNSWVectorsWriter.java

@@ -297,6 +297,7 @@ private HnswGraph writeGraph(CuVSMatrix cagraGraph, int[][] levelNodeOffsets) th
         int maxGraphDegree = (int) cagraGraph.columns();
         int[] neighbors = new int[maxGraphDegree];
 
+        levelNodeOffsets[0] = new int[maxElementCount];
         // write the cagra graph to the Lucene vectorIndex file
         int[] scratch = new int[maxGraphDegree];
         for (int node = 0; node < maxElementCount; node++) {