[jira] [Created] (PIO-119) Bump up Elasticsearch to 5.5.2

[Shinsuke Sugaya (JIRA)]

Shinsuke Sugaya created PIO-119:
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             Summary: Bump up Elasticsearch to 5.5.2
                 Key: PIO-119
                 URL: https://issues.apache.org/jira/browse/PIO-119
             Project: PredictionIO
          Issue Type: Improvement
          Components: Core
            Reporter: Shinsuke Sugaya
            Assignee: Shinsuke Sugaya


I encountered [this 
problem|https://discuss.elastic.co/t/org-elasticsearch-hadoop-rest-eshadoopinvalidrequest-returned-400-bad-request/95803].
To support elasticsearch 5.5, we need to update it.



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