Internal Server Error when creating issue using IssueInputBuilder

[Bindhu]

I am trying to create an issue using IssueInputBuilder and setting customfieldvalue() like 

1.IssueInputBuilder inputBuilder = new IssueInputBuilder(projectKey, issueType, issueSummary);

2. inputBuilder.setDescription("Creating the sample test execution");
3. inputBuilder.setFieldValue("customfield_15928", ComplexIssueInputFieldValue.with("value", "RR-336"));
4. IssueInput issue = inputBuilder.build();                                                                                 

Getting the below exception at the line 3               

RestClientException{statusCode=Optional.of(500), errorCollections=[ErrorCollection{status=500, errors={}, errorMessages=[Internal server error]}]}
at com.atlassian.jira.rest.client.internal.async.DelegatingPromise.claim(DelegatingPromise.java:47)
at com.pru.serviceImpl.JiraBugServiceImpl.createTestExecution(JiraBugServiceImpl.java:48)
at com.pru.jira.test.TestJira.main(TestJira.java:3)                                                 

Can anyone please help me out of this?

[Rolf Lader]

Hi @Bindhu 

Have you found the reason for the "Internal server error"?

Best regards, Rolf