To handle max socket warning while writing the item on DDb

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@alertlogic/paws-collector",
-  "version": "2.2.4",
+  "version": "2.2.5",
   "license": "MIT",
   "description": "Alert Logic AWS based API Poll Log Collector Library",
   "repository": {

paws_collector.js

@@ -52,10 +52,18 @@ const ERROR_CODE_COMPLETED_STATE = 'COMPLETED_STATE';
 const SQS_VISIBILITY_TIMEOUT = 900;
 const DDB_TTL_DAYS = 14;
 const DEDUP_LOG_TTL_SECONDS = 86400;
+let maxSocket = process.env.maxSocket ? process.env.maxSocket : 100;
+
+// using short syntax from https://docs.aws.amazon.com/sdk-for-javascript/v3/developer-guide/node-configuring-maxsockets.html
 const DDB_OPTIONS = {
     maxRetries: 10,
-    ConsistentRead: true
-};
+    ConsistentRead: true,
+    requestHandler: {
+        httpsAgent: {
+            maxSockets: maxSocket
+        }
+    }
+}
 const DDB_DELETE_BATCH_OPTIONS = {
     maxBatchSize: 25,
     maxBatchSizeBytes: 16 * 1024 * 1024
@@ -925,7 +933,7 @@ class PawsCollector extends AlAwsCollector {
     */
     removeDuplicatedItem(logs, paramName, asyncCallback) {
         let collector = this;
-        const ddb = new DynamoDB();
+        const ddb = new DynamoDB(DDB_OPTIONS);
         let uniqueLogs = [];
         var promises = [];
         let duplicateCount = 0;