Failed to process cluster event (create-index [twitter], cause [auto(index api)])

Elastic Stack Elasticsearch
1

At Elasticsearch 2.2.0 when I try to create index and insert data .what could cause it ?

"error":{"root_cause":[{"type":"process_cluster_event_timeout_exception","reason":"failed to process cluster event (create-index [twitter], cause [auto(index api)]) within 1m"}],"type":"process_cluster_event_timeout_exception","reason":"failed to process cluster event (create-index [twitter], cause [auto(index api)]) within 1m"},"status":503

Help me, Thanks