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https://issues.apache.org/jira/browse/SOLR-2588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13087207#comment-13087207
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Erik Hatcher commented on SOLR-2588:
------------------------------------
Ugh, this got more complicated thanks to core tests relying on the example
config. Running on a clean (ant clean) trunk, tests that rely on the example
solrconfig.xml fail because the Velocity contrib JAR isn't built yet. I guess
the other contribs don't fail because their componentry is lazy loaded but
response writers aren't.
For example:
{code}
ant test -Dtestcase=ShowFileRequestHandlerTest
{code}
gives:
{code}
junit-sequential:
[junit] Testsuite: org.apache.solr.handler.admin.ShowFileRequestHandlerTest
[junit] Tests run: 2, Failures: 0, Errors: 2, Time elapsed: 2.033 sec
[junit]
[junit] ------------- Standard Error -----------------
[junit] 18.08.2011 15:13:09 org.apache.solr.common.SolrException log
[junit] SCHWERWIEGEND: org.apache.solr.common.SolrException: Error loading
class 'solr.VelocityResponseWriter'
{code}
Huh?
If you run "ant dist" first, it works because the contrib apache-solr-velocity
JAR is built then.
Ultimately response writers probably should be lazy loaded and only come into
existence when used the first time. Thoughts?
> Make Velocity an optional dependency in SolrCore
> ------------------------------------------------
>
> Key: SOLR-2588
> URL: https://issues.apache.org/jira/browse/SOLR-2588
> Project: Solr
> Issue Type: Wish
> Affects Versions: 3.2
> Reporter: Gunnar Wagenknecht
> Assignee: Erik Hatcher
> Priority: Minor
> Fix For: 3.4, 4.0
>
> Attachments: SOLR-2588.patch, SOLR-2588.patch, SOLR-2588.patch,
> SOLR-2588_Don_t_fail_if_velocity_libs_not_present_.patch
>
>
> In 1.4. it was fine to run Solr without Velocity on the classpath. However,
> in 3.2. SolrCore won't load because of a hard reference to the Velocity
> response writer in a static initializer.
> {noformat}
> ... ERROR org.apache.solr.core.CoreContainer -
> java.lang.NoClassDefFoundError: org/apache/velocity/context/Context
> at org.apache.solr.core.SolrCore.<clinit>(SolrCore.java:1447)
> at org.apache.solr.core.CoreContainer.create(CoreContainer.java:463)
> at org.apache.solr.core.CoreContainer.load(CoreContainer.java:316)
> at org.apache.solr.core.CoreContainer.load(CoreContainer.java:207)
> {noformat}
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