I got some problem during I use the plugin. I think the problem is Great Fire Wall stop the connection between Shanghai China and AWS.
So I setup a proxy for my Jenkins master like this https://wiki.jenkins-ci.org/display/JENKINS/JenkinsBehindProxy
But the problem not solve still. I can use the proxy in chrome to access AWS. I don't know whether this plugin can connect to AWS via Jenkins master's proxy. How can I make the plugin establish connection via a proxy ?

Determining to create or update Cloud Formation stack: CollineCItest158
Stack not found: CollineCItest158. Error was: java.net.UnknownHostException: cloudformation.ap-southeast-1.amazonaws.com
Creating Cloud Formation stack: CollineCItest158
Failed to create stack: CollineCItest158. Error was: java.net.UnknownHostException: cloudformation.ap-southeast-1.amazonaws.com
ERROR: Processing failed due to a bug in the code. Please report this to jenkinsci-users@googlegroups.com
com.amazonaws.AmazonClientException: Unable to execute HTTP request: cloudformation.ap-southeast-1.amazonaws.com
at com.amazonaws.http.AmazonHttpClient.executeHelper(AmazonHttpClient.java:472)
at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:296)
at com.amazonaws.services.cloudformation.AmazonCloudFormationClient.invoke(AmazonCloudFormationClient.java:1273)
at com.amazonaws.services.cloudformation.AmazonCloudFormationClient.deleteStack(AmazonCloudFormationClient.java:1119)
at com.syncapse.jenkinsci.plugins.awscloudformationwrapper.CloudFormation.delete(CloudFormation.java:169)
at com.syncapse.jenkinsci.plugins.awscloudformationwrapper.CloudFormationBuildWrapper.doTearDown(CloudFormationBuildWrapper.java:113)
at com.syncapse.jenkinsci.plugins.awscloudformationwrapper.CloudFormationBuildWrapper.setUp(CloudFormationBuildWrapper.java:87)
at hudson.maven.MavenModuleSetBuild$MavenModuleSetBuildExecution.doRun(MavenModuleSetBuild.java:653)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:537)
at hudson.model.Run.execute(Run.java:1744)
at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:529)
at hudson.model.ResourceController.execute(ResourceController.java:98)
at hudson.model.Executor.run(Executor.java:374)
Caused by: java.net.UnknownHostException: cloudformation.ap-southeast-1.amazonaws.com
at java.net.InetAddress.getAllByName0(InetAddress.java:1243)
at java.net.InetAddress.getAllByName(InetAddress.java:1155)
at java.net.InetAddress.getAllByName(InetAddress.java:1091)
at org.apache.http.impl.conn.SystemDefaultDnsResolver.resolve(SystemDefaultDnsResolver.java:44)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.resolveHostname(DefaultClientConnectionOperator.java:259)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:159)
at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:304)
at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:611)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:446)
at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:863)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:57)
at com.amazonaws.http.AmazonHttpClient.executeOneRequest(AmazonHttpClient.java:686)
at com.amazonaws.http.AmazonHttpClient.executeHelper(AmazonHttpClient.java:461)
... 12 more