jira-rest-java-client is always Connection refused

Question

I am using jira-rest-java-client to operate jira in my java program.

code like

JerseyJiraRestClientFactory factory = new JerseyJiraRestClientFactory();
                URI jiraServerUri = new URI("my jira uri");

JiraRestClient restClient = factory.createWithBasicHttpAuthentication(jiraServerUri, "username", "pwd");
                NullProgressMonitor pm = new NullProgressMonitor();
                Issue issue = restClient.getIssueClient().getIssue("TES-1", pm);

the code directly connect to jira url without proxy, why is always Connection refused??

2012-12-7 9:42:51 org.apache.commons.httpclient.HttpMethodDirector executeWithRetry
信息: I/O exception (java.net.ConnectException) caught when processing request: Connection refused: connect
2012-12-7 9:42:51 org.apache.commons.httpclient.HttpMethodDirector executeWithRetry
信息: Retrying request

Renjith Pillai · Answer

Is the Remote API calls turned ON in the JIRA instance?

https://confluence.atlassian.com/display/JIRA/Configuring+JIRA+Options

Pedro Cora · Answer

The reason for the problem is that you may be getting some network block. I recommend checking with your network administrator.