fix: log4js-node#743 cannot modify immutable configuration

jimmyolo · jimmyolo · commit 06c448727b48 · 2018-07-27T14:44:03.000+08:00
diff --git a/lib/log4js.js b/lib/log4js.js
@@ -22,6 +22,7 @@
  */
 const debug = require('debug')('log4js:main');
 const fs = require('fs');
+const CircularJSON = require('circular-json');
 const configuration = require('./configuration');
 const layouts = require('./layouts');
 const levels = require('./levels');
@@ -57,7 +58,7 @@ function configure(configurationFileOrObject) {
     configObject = loadConfigurationFile(configurationFileOrObject);
   }
   debug(`Configuration is ${configObject}`);
-  configuration.configure(configObject);
+  configuration.configure(CircularJSON.parse(CircularJSON.stringify(configObject)));
 
   clustering.onMessage(sendLogEventToAppender);
 
