[DocumentUpdaterManager] use a new NullBytesInOpError

services/real-time/app/js/DocumentUpdaterManager.js

@@ -6,7 +6,7 @@ const _ = require('underscore')
 const logger = require('logger-sharelatex')
 const settings = require('settings-sharelatex')
 const metrics = require('metrics-sharelatex')
-const { UpdateTooLargeError } = require('./Errors')
+const { NullBytesInOpError, UpdateTooLargeError } = require('./Errors')
 
 const rclient = require('redis-sharelatex').createClient(
   settings.redis.documentupdater
@@ -116,12 +116,7 @@ const DocumentUpdaterManager = {
     const jsonChange = JSON.stringify(change)
     if (jsonChange.indexOf('\u0000') !== -1) {
       // memory corruption check
-      const error = new Error('null bytes found in op')
-      logger.error(
-        { err: error, project_id, doc_id, jsonChange },
-        error.message
-      )
-      return callback(error)
+      return callback(new NullBytesInOpError(jsonChange))
     }
 
     const updateSize = jsonChange.length

services/real-time/app/js/Errors.js

@@ -15,10 +15,21 @@ class DataTooLargeToParseError extends OError {
   }
 }
 
+class NullBytesInOpError extends OError {
+  constructor(jsonChange) {
+    super('null bytes found in op', { jsonChange })
+  }
+}
+
 class UpdateTooLargeError extends OError {
   constructor(updateSize) {
     super('update is too large', { updateSize })
   }
 }
 
-module.exports = { CodedError, DataTooLargeToParseError, UpdateTooLargeError }
+module.exports = {
+  CodedError,
+  DataTooLargeToParseError,
+  NullBytesInOpError,
+  UpdateTooLargeError
+}