elastic search の java apiを使用した際に発生するエラー

ElasticSearchにjavaのapiを使用して数十万件の大量データを投入するときに以下のようなエラーが発生します。
内容を見る限り、処理が5秒以上かかると発生するエラーのようです。
ただ、データ自体は正しく登録されているようです。

-- エラー内容 --

6 04, 2015 2:42:02 午後 org.elasticsearch.plugins.PluginsService <init>
情報: [Storm] loaded [], sites []
6 04, 2015 2:43:36 午後 org.elasticsearch.client.transport.TransportClientNodesService$SimpleNodeSampler doSample
情報: [Storm] failed to get node info for [#transport#-1][or-00154.bbq.net-marketing.co.jp][inet[/192.168.33.10:9300]], disconnecting...
org.elasticsearch.transport.ReceiveTimeoutTransportException: [][inet[/192.168.33.10:9300]][cluster:monitor/nodes/info] request_id [18] timed out after [5002ms]
	at org.elasticsearch.transport.TransportService$TimeoutHandler.run(TransportService.java:366)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)

6 04, 2015 2:43:46 午後 org.elasticsearch.client.transport.TransportClientNodesService$SimpleNodeSampler doSample
情報: [Storm] failed to get node info for [#transport#-1][or-00154.bbq.net-marketing.co.jp][inet[/192.168.33.10:9300]], disconnecting...
org.elasticsearch.transport.ReceiveTimeoutTransportException: [][inet[/192.168.33.10:9300]][cluster:monitor/nodes/info] request_id [19] timed out after [5039ms]
	at org.elasticsearch.transport.TransportService$TimeoutHandler.run(TransportService.java:366)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)

6 04, 2015 2:43:56 午後 org.elasticsearch.client.transport.TransportClientNodesService$SimpleNodeSampler doSample
情報: [Storm] failed to get node info for [#transport#-1][or-00154.bbq.net-marketing.co.jp][inet[/192.168.33.10:9300]], disconnecting...
org.elasticsearch.transport.ReceiveTimeoutTransportException: [][inet[/192.168.33.10:9300]][cluster:monitor/nodes/info] request_id [20] timed out after [5001ms]
	at org.elasticsearch.transport.TransportService$TimeoutHandler.run(TransportService.java:366)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)

6 04, 2015 2:44:06 午後 org.elasticsearch.client.transport.TransportClientNodesService$SimpleNodeSampler doSample
情報: [Storm] failed to get node info for [#transport#-1][or-00154.bbq.net-marketing.co.jp][inet[/192.168.33.10:9300]], disconnecting...
org.elasticsearch.transport.ReceiveTimeoutTransportException: [][inet[/192.168.33.10:9300]][cluster:monitor/nodes/info] request_id [21] timed out after [5001ms]
	at org.elasticsearch.transport.TransportService$TimeoutHandler.run(TransportService.java:366)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)

6 04, 2015 2:44:16 午後 org.elasticsearch.client.transport.TransportClientNodesService$SimpleNodeSampler doSample
情報: [Storm] failed to get node info for [#transport#-1][or-00154.bbq.net-marketing.co.jp][inet[/192.168.33.10:9300]], disconnecting...
org.elasticsearch.transport.ReceiveTimeoutTransportException: [][inet[/192.168.33.10:9300]][cluster:monitor/nodes/info] request_id [22] timed out after [5001ms]
	at org.elasticsearch.transport.TransportService$TimeoutHandler.run(TransportService.java:366)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)