public void setMaxRetryCount(int maxRetryCount) {
            checkArgument(maxRetryCount >= 0);
            this.maxRetryCount = maxRetryCount;
        }
Provides a backoff policy for bulk requests. Whenever a bulk request is rejected due to
resource constraints (i.e. the client's internal thread pool is full), the backoff policy
decides how long the bulk processor will wait before the operation is retried internally.

<p>This is a proxy for version specific backoff policies.
inlong-sort/sort-flink/sort-flink-v1.18/sort-connectors/elasticsearch-base/src/main/java/org/apache/inlong/sort/elasticsearch/ElasticsearchSinkBase.java