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https://issues.apache.org/jira/browse/SOLR-599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17040183#comment-17040183
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Jan Høydahl commented on SOLR-599:
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We now have 29 dependencies:
{noformat}
commons-io-2.6.jar
commons-math3-3.6.1.jar
http2-client-9.4.24.v20191120.jar
http2-common-9.4.24.v20191120.jar
http2-hpack-9.4.24.v20191120.jar
http2-http-client-transport-9.4.24.v20191120.jar
httpclient-4.5.10.jar
httpcore-4.4.12.jar
httpmime-4.5.10.jar
jcl-over-slf4j-1.7.24.jar
jetty-alpn-client-9.4.24.v20191120.jar
jetty-alpn-java-client-9.4.24.v20191120.jar
jetty-client-9.4.24.v20191120.jar
jetty-http-9.4.24.v20191120.jar
jetty-io-9.4.24.v20191120.jar
jetty-util-9.4.24.v20191120.jar
netty-buffer-4.1.29.Final.jar
netty-codec-4.1.29.Final.jar
netty-common-4.1.29.Final.jar
netty-handler-4.1.29.Final.jar
netty-resolver-4.1.29.Final.jar
netty-transport-4.1.29.Final.jar
netty-transport-native-epoll-4.1.29.Final.jar
netty-transport-native-unix-common-4.1.29.Final.jar
slf4j-api-1.7.24.jar
stax2-api-3.1.4.jar
woodstox-core-asl-4.4.1.jar
zookeeper-3.5.5.jar
zookeeper-jute-3.5.5.jar{noformat}
See [mailing list thread "SolrJ has 29 compile-time
dependencies"|https://lists.apache.org/thread.html/r637d3a728102c262b3355e10c2b9a25731f7e7225d70f5dd87d56929%40%3Cdev.lucene.apache.org%3E]
for more discussion.
It has been suggested to create a new client for 9.0 based on Java's built-in
HTTP2 client, and without the Zookeeper dependencies. I guess that would let us
skip most of the other dependencies as well?
What about all the classes in {{o.a.s.common}} - many of those depend on
Zookeeper. But SolrJ code also depend on many of these such as {{common.util}}.
How to break it up so that we do not need to depend on all or nothing for SolrJ?
> 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
> Assignee: Noble Paul
> 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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