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https://issues.apache.org/jira/browse/SOLR-599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17041047#comment-17041047
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Jan Høydahl commented on SOLR-599:
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Should be enough with optimistic, yes. Gus' concern I guess was that if things 
change in ZK before a request, then something could go wrong? I assume that the 
worst that can happen is that SolrJ sends updates to a dead node (in which case 
it will retry to another node) or to a non-leader (in which case a new state 
will be cached for the next request?). What do you mean could go wrong with 
aliases Gus?

> Lightweight SolrJ client
> ------------------------
>
>                 Key: SOLR-599
>                 URL: https://issues.apache.org/jira/browse/SOLR-599
>             Project: Solr
>          Issue Type: Improvement
>          Components: clients - java, SolrJ
>            Reporter: Shalin Shekhar Mangar
>            Priority: Minor
>             Fix For: 4.9, 6.0
>
>         Attachments: SOLR-599-fix-for-SolrJ-on-GAE.patch, SOLR-599.patch, 
> SOLR-599.patch
>
>
> SolrJ provides a SolrServer implementation backed by commons-httpclient which 
> introduces many dependency jars (commons-codec, commons-io and 
> commons-logging). Apart from that SolrJ also uses StAX API for XML parsing 
> which introduces dependencies like stax-api, stax and stax-utils.
> This enhancement will add a SolrServer implementation backed by 
> java.net.HttpUrlConnection and will use BinaryResponseParser as the default 
> response parser. Using this basic implementation out of the box would require 
> no dependencies on either commons-httpclient or StAX. The only dependency 
> would be on solr-commons making this a very lightweight and distribution 
> friendly Java client for Solr.



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