Exception while running 280 concurrent threads in jmeter

[Mytho Logic <ma...@gmail.com>]

Hi,

I am new in Jmeter and facing problem while load testing my web application.



I am using jmeter version 2.3.2 for my project.

I have created a test plan of using 3 thread groups and 280 concurrent
threads.



-----

-Test plan

 - synchronize Timer (set 280 threads)

 - Thread Group (users = 90, ramp-up periord = 0)

    a. this thread group hs 12 sample requests

 - Thread Group (users = 90, ramp-up periord = 0)

    a. this thread group hs 12 sample requests

 - Thread Group (users = 90, ramp-up periord = 0)

    a. this thread group hs 12 sample requests

 - View Results tree

 - View Results in table

 - Aggregate reports



-----



The aggregate reports says –

Label

# Samples

Average

Median

90% Line

Min

Max

Error %

Throughput

KB/sec

TG:Home Page

280

1398

1152

3448

126

3677

0

76.02498

2401.469

TG:Products Page

280

7872

7254

15087

991

17770

0.15

15.73564

1318.31

TG:showSmallProductImage1

280

804

833

1362

50

3439

0

81.39535

136.6393

TG:showSmallProductImage2

280

786

675

1450

42

1458

0

187.4163

366.0475

TG:showSmallProductImage3

280

841

977

1512

58

1548

0

179.1427

411.1184

TG:showSmallProductImage4

280

1023

931

1647

147

3442

0

81.15942

234.5222

TG:showSmallProductImage5

280

849

875

1489

39

1627

0

170.3163

394.0228

TG:showSmallProductImage6

280

840

874

1454

22

1636

0

169.0821

275.2538

TG:showSmallProductImage7

280

828

800

1497

44

1636

0

168.9801

390.9315

TG:showSmallProductImage8

280

943

938

1641

16

1770

0

156.3372

451.7597

TG:showSmallProductImage9

280

951

1077

1621

20

3245

0

86.26001

131.7487

TG:Product Detail Page

280

1269

1108

2202

205

4407

0

63.37709

1914.001

TOTAL

3360

1534

993

2156

16

17770

0.0125

66.12351

909.5012



The aggregate reports show 15% (marked in red) failure for label “Products
Page”. I checked the ‘Response Data’ for label ‘Products Page’ in ‘View
Results Tree’ and found the following exception –



java.net.ConnectException: Connection refused: connect at
java.net.PlainSocketImpl.socketConnect(Native Method) at
java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333) at
java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195) at
java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182) at
java.net.Socket.connect(Socket.java:519) at
java.net.Socket.connect(Socket.java:469) at
sun.net.NetworkClient.doConnect(NetworkClient.java:157) at
sun.net.www.http.HttpClient.openServer(HttpClient.java:382) at
sun.net.www.http.HttpClient.openServer(HttpClient.java:494) at
sun.net.www.http.HttpClient.(HttpClient.java:231) at
sun.net.www.http.HttpClient.New(HttpClient.java:304) at
sun.net.www.http.HttpClient.New(HttpClient.java:316) at
sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:817)
at
sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:769)
at
sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:694)
at
org.apache.jmeter.protocol.http.sampler.HTTPSampler.sample(HTTPSampler.java:431)
at
org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1021)
at
org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1007)
at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:290) at
java.lang.Thread.run(Thread.java:595)





Questions-



1.       What is this exception means and how can I resolve my problem?

2.       I need to do load test my web application for 2500 Concurrent
users. Currently what I’m doing is this is the correct approach?

If not, please help me.



This is an urgent  requirement for my project.



Thanks

Maumita