[jira] [Created] (FALCON-248) Improve the error message when falcon is not fully operational

["Jean-Baptiste Onofré (JIRA)" <ji...@apache.org>]

Jean-Baptiste Onofré created FALCON-248:
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             Summary: Improve the error message when falcon is not fully operational
                 Key: FALCON-248
                 URL: https://issues.apache.org/jira/browse/FALCON-248
             Project: Falcon
          Issue Type: Improvement
          Components: general
            Reporter: Jean-Baptiste Onofré


Using an external ActiveMQ (with export FALCON_OPTS="-Dfalcon.embeddedmq=false" in conf/falcon-env.sh), when the ActiveMQ broker is not started, falcon starts fine.

However, when performing a simple:

bin/falcon entity -type cluster -list

we get the following error message:

Jan 08, 2014 11:52:59 AM com.sun.jersey.api.client.ClientResponse getEntity
SEVERE: A message body reader for Java class org.apache.falcon.resource.EntityList, and Java type class org.apache.falcon.resource.EntityList, and MIME media type text/html; charset=iso-8859-1 was not found
Jan 08, 2014 11:52:59 AM com.sun.jersey.api.client.ClientResponse getEntity
SEVERE: The registered message body readers compatible with the MIME media type are:
*/* ->
  com.sun.jersey.core.impl.provider.entity.FormProvider
  com.sun.jersey.core.impl.provider.entity.StringProvider
  com.sun.jersey.core.impl.provider.entity.ByteArrayProvider
  com.sun.jersey.core.impl.provider.entity.FileProvider
  com.sun.jersey.core.impl.provider.entity.InputStreamProvider
  com.sun.jersey.core.impl.provider.entity.DataSourceProvider
  com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$General
  com.sun.jersey.core.impl.provider.entity.ReaderProvider
  com.sun.jersey.core.impl.provider.entity.DocumentProvider
  com.sun.jersey.core.impl.provider.entity.SourceProvider$StreamSourceReader
  com.sun.jersey.core.impl.provider.entity.SourceProvider$SAXSourceReader
  com.sun.jersey.core.impl.provider.entity.SourceProvider$DOMSourceReader
  com.sun.jersey.json.impl.provider.entity.JSONJAXBElementProvider$General
  com.sun.jersey.json.impl.provider.entity.JSONArrayProvider$General
  com.sun.jersey.json.impl.provider.entity.JSONObjectProvider$General
  com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$General
  com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$General
  com.sun.jersey.core.impl.provider.entity.XMLRootObjectProvider$General
  com.sun.jersey.core.impl.provider.entity.EntityHolderReader
  com.sun.jersey.json.impl.provider.entity.JSONRootElementProvider$General
  com.sun.jersey.json.impl.provider.entity.JSONListElementProvider$General

Unable to connect to Falcon server, please check if the URL is correct and Falcon server is up and running
A message body reader for Java class org.apache.falcon.resource.EntityList, and Java type class org.apache.falcon.resource.EntityList, and MIME media type text/html; charset=iso-8859-1 was not found

The logs/falcon.application.log clearly indicates that the ActiveMQ broker is not there, but it could be helpful to display a simpler and more straight forward message.

I'm working on it to propose a patch.



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