[PIO-120] Process hangs if Elasticsearch is not available during train

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.12.0-incubating
• Fix Version/s: 0.12.0-incubating
• Component/s: Core
• External issue URL: https://github.com/apache/incubator-predictionio/pull/432
• Assignee: Mars Hall
• Reporter: Mars Hall
• Created: 07/Sep/17 21:43
• Updated: 05/Dec/17 22:44
• Resolved: 12/Sep/17 00:14

Description

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

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)

Issue Links

• links to: GitHub Pull Request #432