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code:

 checkMongoQuery(mqueries,function(data)
 message.mongo=data; 
 checkMySqlQuery(temp,function(data)
 if(data.msg==gloabl_vars.messages.success)
 message.msg==gloabl_vars.messages.success;
 
 else
 message.msg==gloabl_vars.messages.failed;
 
 message.mysql=data;
 result(null,message);
 );
 );

first it will call checkMongoQuery function and then it will execute checkMySqlQuery finction on success of both it will return the result method. at result method it is throwing an error saying that "Rethrown non mysql error".
Please let me know where is the issue in above code. thanks in advance.

error trace:

E:nodeapinode_modulesmysqllibprotocolParser.js:80
 throw err; // Rethrow non-MySQL errors
 ^

Error: Can't set headers after they are sent.
 at validateHeader (_http_outgoing.js:491:11)
 at ServerResponse.setHeader (_http_outgoing.js:498:3)
 at ServerResponse.header (E:nodeapinode_modulesexpresslibresponse.js:76
7:10)
 at ServerResponse.send (E:nodeapinode_modulesexpresslibresponse.js:170:
12)
 at ServerResponse.json (E:nodeapinode_modulesexpresslibresponse.js:267:
15)
 at E:nodeapiapicontrollersappController.js:96:11
 at E:nodeapiapimodelsappModel.js:141:10
 at Query.<anonymous> (E:nodeapiapimodelsappModel.js:193:9)
 at Query.<anonymous> (E:nodeapinode_modulesmysqllibConnection.js:502:10
)
 at Query._callback (E:nodeapinode_modulesmysqllibConnection.js:468:16)
[nodemon] app crashed - waiting for file changes before starting...