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java.io.IOException: Too many open files	at sun.nio.ch.IOUtil.makePipe(Native Method)	at sun.nio.ch.EPollSelectorImpl.(EPollSelectorImpl.java:65)	at sun.nio.ch.EPollSelectorProvider.openSelector(EPollSelectorProvider.java:36)	at java.nio.channels.Selector.open(Selector.java:227)	at org.jboss.netty.channel.socket.nio.SelectorUtil.open(SelectorUtil.java:63)	at org.jboss.netty.channel.socket.nio.AbstractNioSelector.openSelector(AbstractNioSelector.java:360)	at org.jboss.netty.channel.socket.nio.AbstractNioSelector.(AbstractNioSelector.java:100)	at org.jboss.netty.channel.socket.nio.AbstractNioWorker.(AbstractNioWorker.java:52)	at org.jboss.netty.channel.socket.nio.NioWorker.(NioWorker.java:45)	at org.jboss.netty.channel.socket.nio.NioWorkerPool.newWorker(NioWorkerPool.java:44)	at org.jboss.netty.channel.socket.nio.NioWorkerPool.newWorker(NioWorkerPool.java:28)	at org.jboss.netty.channel.socket.nio.AbstractNioWorkerPool.init(AbstractNioWorkerPool.java:80)	at org.jboss.netty.channel.socket.nio.NioWorkerPool.(NioWorkerPool.java:39)	at org.jboss.netty.channel.socket.nio.NioWorkerPool.(NioWorkerPool.java:33)	at org.elasticsearch.transport.netty.NettyTransport.createClientBootstrap(NettyTransport.java:346)	at org.elasticsearch.transport.netty.NettyTransport.doStart(NettyTransport.java:279)	at org.elasticsearch.common.component.AbstractLifecycleComponent.start(AbstractLifecycleComponent.java:68)	at org.elasticsearch.transport.TransportService.doStart(TransportService.java:182)	at org.elasticsearch.common.component.AbstractLifecycleComponent.start(AbstractLifecycleComponent.java:68)	at org.xbib.elasticsearch.helper.client.TransportClient$Builder.build(TransportClient.java:139)	at org.xbib.elasticsearch.helper.client.BaseTransportClient.createClient(BaseTransportClient.java:73)	at org.xbib.elasticsearch.helper.client.BaseMetricTransportClient.init(BaseMetricTransportClient.java:40)	at org.xbib.elasticsearch.helper.client.BulkTransportClient.init(BulkTransportClient.java:96)	at org.xbib.elasticsearch.helper.client.ClientBuilder.toBulkTransportClient(ClientBuilder.java:113)	at org.xbib.elasticsearch.jdbc.strategy.standard.StandardSink.createClient(StandardSink.java:348)	at org.xbib.elasticsearch.jdbc.strategy.standard.StandardSink.beforeFetch(StandardSink.java:100)	at org.xbib.elasticsearch.jdbc.strategy.standard.StandardContext.beforeFetch(StandardContext.java:183)	at org.xbib.elasticsearch.jdbc.strategy.standard.StandardContext.execute(StandardContext.java:164)	at org.xbib.tools.JDBCImporter.process(JDBCImporter.java:199)	at org.xbib.tools.JDBCImporter.newRequest(JDBCImporter.java:185)	at org.xbib.tools.JDBCImporter.newRequest(JDBCImporter.java:51)	at org.xbib.pipeline.AbstractPipeline.call(AbstractPipeline.java:50)	at org.xbib.pipeline.AbstractPipeline.call(AbstractPipeline.java:16)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)