"No content to map to Object due to end of input" error when updating issue

[wangxueyuan]

try {
    FieldInput fieldInput = new FieldInput(key, value);
    issueRestClient.updateIssue(issueId, IssueInput.createWithFields(fieldInput)).claim();
} catch (Exception e) {
    log.error("updateIssue has errors with msg->{}, issueId->{}", e.getMessage(), issueId, e);
}

I used the codes above to update issue , but however I got an error below when I do it. And I really don't know why.

com.atlassian.jira.rest.client.api.RestClientException: [ErrorCollection{status=400, errors={}, errorMessages=[No content to map to Object due to end of input]}]