java.lang.OutOfMemoryError: Java heap space
   at java.util.Arrays.copyOf(Arrays.java:3332)
   at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:137)
   at java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:121)
   at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:421)
   at java.lang.StringBuffer.append(StringBuffer.java:272)
   at org.json.simple.JSONArray.toJSONString(JSONArray.java:91)
   at org.json.simple.JSONArray.toJSONString(JSONArray.java:98)
   at org.json.simple.JSONValue.toJSONString(JSONValue.java:199)
   at org.json.simple.JSONObject.toJSONString(JSONObject.java:119)
   at org.json.simple.JSONObject.toJSONString(JSONObject.java:101)
   at org.json.simple.JSONObject.toJSONString(JSONObject.java:108)
   at org.json.simple.JSONValue.toJSONString(JSONValue.java:199)
   at org.json.simple.JSONObject.toJSONString(JSONObject.java:119)
   at org.json.simple.JSONObject.toJSONString(JSONObject.java:101)
   at org.json.simple.JSONObject.toJSONString(JSONObject.java:108)
   at org.netbeans.modules.web.webkit.debugging.spi.Response.toString(Response.java:112)
   at org.netbeans.modules.web.webkit.debugging.TransportHelper$Callback.handleResponse(TransportHelper.java:290)
   at org.netbeans.core.browser.webview.ext.WebKitDebuggingTransport$FXCallback$1.run(WebKitDebuggingTransport.java:173)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)