Adding a check for sanity to the blockManager task.

lib/blockManager.js

@@ -14,6 +14,7 @@ let scanInProgress = false;
 let blockHexCache = {};
 let lastBlock = 0;
 let balanceIDCache = {};
+let blockScannerTask;
 let blockQueue = async.queue(function (task, callback) {
     global.support.rpcDaemon('getblockheaderbyheight', {"height": task.blockID}, function (body) {
         let blockData = body.result.block_header;
@@ -40,6 +41,9 @@ let blockQueue = async.queue(function (task, callback) {
 blockQueue.drain = function () {
     console.log("Scan complete, unlocking remainder of blockManager functionality.");
     scanInProgress = false;
+    if (typeof(blockScannerTask) === 'undefined'){
+        blockScannerTask = setInterval(blockScanner, 1000);
+    }
 };
 
 let createBalanceQueue = async.queue(function (task, callback) {
@@ -475,6 +479,7 @@ function blockScanner() {
         if (inc_check === 0) {
             debug("No new work to be performed, initial scan complete");
             scanInProgress = false;
+            blockScannerTask = setInterval(blockScanner, 1000);
         }
     });
 }
@@ -490,7 +495,7 @@ function initial_sync() {
         });
     }).then(function () {
         // Enable block scanning for 1 seconds to update the block log.
-        setInterval(blockScanner, 1000);
+        blockScanner();
         // Scan every 120 seconds for invalidated blocks
         setInterval(blockInvalidator, 120000);
         setInterval(blockUnlocker, 120000);