jmeter error

gistfile1.txt

Thread Name: jp@gc - Stepping Thread Group 1-1
Sample Start: 2017-04-28 16:16:58 BST
Load time: 21000
Connect Time: 0
Latency: 0
Size in bytes: 773
Headers size in bytes: 0
Body size in bytes: 773
Sample Count: 1
Error Count: 1
Data type ("text"|"bin"|""): text
Response code: 500
Response message: org.jivesoftware.smack.SmackException$ConnectionException

Response headers:


SampleResult fields:
ContentType: 
DataEncoding: null

org.jivesoftware.smack.SmackException$ConnectionException
	at org.jivesoftware.smack.tcp.XMPPTCPConnection.connectUsingConfiguration(XMPPTCPConnection.java:436)
	at org.jivesoftware.smack.tcp.XMPPTCPConnection.connectInternal(XMPPTCPConnection.java:811)
	at org.jivesoftware.smack.XMPPConnection.connect(XMPPConnection.java:396)
	at com.blazemeter.jmeter.xmpp.actions.Connect.perform(Connect.java:18)
	at com.blazemeter.jmeter.xmpp.JMeterXMPPSampler.sample(JMeterXMPPSampler.java:57)
	at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:465)
	at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:410)
	at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:241)
	at java.lang.Thread.run(Unknown Source)