[jira] [Created] (PIO-120) Process hangs if Elasticsearch is not available during train

["Mars Hall (JIRA)" <ji...@apache.org>]

Mars Hall created PIO-120:
-----------------------------

             Summary: Process hangs if Elasticsearch is not available during train
                 Key: PIO-120
                 URL: https://issues.apache.org/jira/browse/PIO-120
             Project: PredictionIO
          Issue Type: Bug
          Components: Core
    Affects Versions: 0.12.0-incubating
            Reporter: Mars Hall
            Assignee: Mars Hall


I noticed that, when Elasticsearch is configured as meta storage, `pio train` will hang with the following error unless Elasticsearch is on-line/available:

{code}
Exception in thread "main" java.net.ConnectException: Connection refused
	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
	at org.apache.predictionio.shaded.org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processEvent(DefaultConnectingIOReactor.java:171)
	at org.apache.predictionio.shaded.org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processEvents(DefaultConnectingIOReactor.java:145)
	at org.apache.predictionio.shaded.org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.execute(AbstractMultiworkerIOReactor.java:348)
	at org.apache.predictionio.shaded.org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager.execute(PoolingNHttpClientConnectionManager.java:192)
	at org.apache.predictionio.shaded.org.apache.http.impl.nio.client.CloseableHttpAsyncClientBase$1.run(CloseableHttpAsyncClientBase.java:64)
	at java.lang.Thread.run(Thread.java:745)
{code}




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