Uwe Schindler created SOLR-5950:
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Summary: In SolrJ's Maven Dependency Graph, slf4j-api is optional,
which breaks plain solrj users
Key: SOLR-5950
URL: https://issues.apache.org/jira/browse/SOLR-5950
Project: Solr
Issue Type: Bug
Components: clients - java
Affects Versions: 4.7.1, 4.7
Reporter: Uwe Schindler
To run as a Solr Client, you need slf4j actually configured in your classpath,
because HttpSolrServer hardly depends on it, also the used libs like Commons
Httpclient (and others)
In SOLR-3706 *all* of the slf4j JARs were made optional, but because we did not
exclude the dependencies of httpclient and others explicitely, the dependency
was still included by maven automatically for a user that used SolrJ - so
effectively the "optional" was never working.
In 4.7, [~steve_rowe] now explicitely excluded all dependencies of all deps
included via IVY. By that the implicit dependency by httpclient was killed.
When I updated a project from SolrJ 4.6 to SolrJ 4.7, it suddenly failed to
run, because it failed with a classnotfound ex directly after starting. Not
even the default logging to console was enabled (which is provided by slf4j).
This is bad for users of SolrJ, because they have to explicitely add a
dependency for something that really required to use SolrJ.
The reason for excluding slf4j-api was that we don't want to have it in the WAR
file, so it was made optional. But that is wrong:
- In trunk we no longer have a WAR file
- The primary user of SolrJ via Maven is not somebody who wants to install Solr
in his appserver, its the user needing the client.
So we should restore the state from Solr 4.6, where the dep was implicitely
included, by making it non-optional in Maven.
When building the WAR file in 4.x we should exclude it somehow via Maven
Magic(tm).
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