storage: Ensure updated documents have at least one variantStats. #TASK-6217

Author: j-coll

opencga-storage/opencga-storage-core/src/main/java/org/opencb/opencga/storage/core/variant/search/VariantSearchSyncInfo.java

@@ -105,5 +105,13 @@ public static Status from(String c) {
         }
     }
 
-
+    @Override
+    public String toString() {
+        final StringBuilder sb = new StringBuilder("VariantSearchSyncInfo{");
+        sb.append("status=").append(status);
+        sb.append(", studies=").append(studies);
+        sb.append(", statsHash=").append(statsHash);
+        sb.append('}');
+        return sb.toString();
+    }
 }

opencga-storage/opencga-storage-core/src/main/java/org/opencb/opencga/storage/core/variant/search/VariantToSolrBeanConverterTask.java

@@ -78,6 +78,11 @@ public VariantSearchUpdateDocument convert(Variant variant) {
                         updateDocument.removeField(fieldName);
                     }
                 }
+                if (updateDocument.getFieldNames().size() <= 1) {
+                    throw new IllegalStateException("No stats fields found in variant " + variant + ". "
+                            + "This should not happen, as the variant is expected to have stats. "
+                            + "Resolved sync info: " + resolvedSyncInfo);
+                }
 
                 return new VariantSearchUpdateDocument(variant, resolvedSyncInfo, updateDocument, false);
             }