Thank you guys, I got it. Also fs-graceful seems a good solution.
On Monday, April 29, 2013 6:43:40 PM UTC+4:30, Afshin Mehrabani wrote:
>
> Today when I tried to implement an example of using async/sync I/O methods
> in NodeJs, I faced an strange problem. When I'm trying to send requests
> with ab, I get this error in Async method:
>
> { [Error: EMFILE, open 'sample.txt'] errno: 20, code: 'EMFILE', path:
>> 'sample.txt' }
>
>
> But the same functionality in Sync mode works well, without any errors.
>
> This is my ab command for running the test: ab -n 10000 -c 1000 -vhr
> http://localhost:8080/
>
> Here is my both codes:
>
> *Async:*
>
> http.createServer(function (req, res) {
>> fs.readFile('sample.txt', function (err, data) {
>> if(err) {
>> res.writeHead(500, {'Content-Type': 'text/plain'});
>> res.end();
>> console.log(err);
>> } else {
>> res.writeHead(200, {'Content-Type': 'text/plain'});
>> res.end(data);
>> }
>> });
>> }).listen(8080, '127.0.0.1');
>
>
> *Sync:*
>
> http.createServer(function (req, res) {
>> var fileOutput = fs.readFileSync('sample.txt').toString();
>> if(!fileOutput) {
>> res.writeHead(500, {'Content-Type': 'text/plain'});
>> res.end('Error in reading the file.');
>> } else {
>> res.writeHead(200, {'Content-Type': 'text/plain'});
>> res.end(fileOutput);
>> }
>> }).listen(8081, '127.0.0.1');
>
>
> What's the matter? Is there any problem in using Async methods?
>
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