[fix] handle exit and error events of tail process as well as add retry

functionality

lib/solenoid.js

@@ -390,24 +390,45 @@ var startApp = exports.startApp = function startApp(options, callback) {
           fs.writeFile(options.pidFile, pid, next.bind(null, null));
         },
         function tailLog(next) {
-          var allLog = '',
+          var maxRetries = 3,
+              retries = 0,
               json,
               err;
 
+          //
+          // TODO: make this cleaner
+          //
+          function retry(e) {
+            if (++retries < maxRetries) {
+              return tailLog(next);
+            }
+            next(e);
+          }
+
           logger.info('Tailing forza log: ' + startLog);
           tail = spawn('tail', ['-f', startLog]);
+          tail.on('error', retry);
+          tail.on('exit', function (code) {
+            return code != 0
+              ? retry(new Error('tailing start log exited poorly with code ' + code))
+              : next()
+          });
           tail.stdout.pipe(concat(function (data) {
-
-            try { json = JSON.parse(allLog) }
-            catch (ex) { err = new Error('No start log data') }
+            try { json = JSON.parse(data) }
+            catch (ex) { err = new Error('No parseable data') }
 
             // Use console.log to ensure it is JSON parseable
             console.log(JSON.stringify(json));
 
             try { tail.kill() }
             catch (ex) { }
 
-            next(err);
+            //
+            // Remark: Do we want to handle this possible error case?
+            //
+            return err
+              ? retry(err)
+              : next();
           }));
         }
       ], done);