added comments

core/server/TaskWorker.cpp

@@ -75,6 +75,9 @@ void TaskWorker::workerThread(LogContext log_context) {
 
     err_msg.clear();
     first = true;
+    // This value is increased everytime a failed db connection happens and is
+    // used to prevent the relevant logging from printing as fast as this while
+    // loop can run
     db_connection_backoff = 1;
 
     while (true) {
@@ -136,6 +139,7 @@ void TaskWorker::workerThread(LogContext log_context) {
           }
         }
 
+        // Set back to default since a db connection was successfully established
         db_connection_backoff = 1;
       } catch (TraceException &e) {
         err_msg = e.toString();
@@ -145,7 +149,14 @@ void TaskWorker::workerThread(LogContext log_context) {
                                   << " task_id is " << m_task->task_id
                                   << " cmd is " << cmd);
 
+        // Detect, log, and backoff the db connection until it can successfully be established
         if (err_msg.find("SDMS DB interface failed") != std::string::npos) {
+            DL_INFO(log_context, "Task worker "
+              << id() << " exception: " << err_msg
+              << " backoff is set to " << db_connection_backoff
+              << " task_id is " << m_task->task_id
+              << " cmd is " << cmd);
+
             int sleep_time = db_connection_backoff;
             db_connection_backoff = min(db_connection_backoff * 2, 60);
             sleep(sleep_time);