Java 搜索操作期间的速率时间限制错误

当我尝试使用twitter4j通过搜索（sports+exclude:retweets）等关键字来获取公共推文时，我遇到以下错误：

420:Returned by the Search and Trends API when you are being rate limited (https:
    //dev.twitter.com/docs/rate-limiting).
    Returned by the Streaming API:
     Too many login attempts in a short period of time.
     Running too many copies of the same application authenticating with the same acc
    ount name.
    {"error":"You have been rate limited. Enhance your calm."}
    Relevant discussions can be found on the Internet at:
            http://www.google.co.jp/search?q=d35baff5 or
            http://www.google.co.jp/search?q=0877c84f
    TwitterException{exceptionCode=[d35baff5-0877c84f], statusCode=420, retryAfter=51
    1, rateLimitStatus=null, featureSpecificRateLimitStatus=null, version=2.2.6}
            at twitter4j.internal.http.HttpClientImpl.request(HttpClientImpl.java:185

    - Unable to search keyword = Query{query='sports OR +exclude:retweets', lang='n
    ull', locale='null', maxId=-1, rpp=-1, page=15, since='null', sinceId=-1, geocode
    ='null', until='null', resultType='null'} You have been rate limited. Enhance your calm

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有谁能告诉我，为什么我只是在做一个搜索操作的时候才得到这个消息？API有什么问题吗？

看起来就像错误所说的那样，您受到了速率限制。你是不是连续运行这个太多次了？您的连接频率是否超过需要