Good to know Solr already loads them, that removed a bunch of lines from my solrconfig.xml.
Having to copy the required jars from dist/ to lib/ isn't ideal but if that's the only solution then at least I can stop searching for a solution and figure out how best to deal with this limitation. I assume the reason for this is that the libs in solr.home.home/lib are loaded at runtime? I don't know much about how this works in Java but i'm guessing Solr can access the classes in the Jars but not the other way around? Thanks for your help guys. On Thu, Jan 14, 2016 at 5:03 PM, Shawn Heisey <apa...@elyograg.org> wrote: > On 1/14/2016 5:36 AM, Callum Lamb wrote: > > I've got an extension jar that contains a class which extends from > > > > org.apache.solr.handler.dataimport.DataSource > > > > But it only works if it's within the solr/dist folder. However when > stored > > in the lib/ folder within Solr home. When it tries to load the class it > > cannot find it's parent: > > > > Exception in thread "Thread-69" java.lang.NoClassDefFoundError: > > org/apache/solr/handler/dataimport/DataSource > > at > > > org.apache.solr.handler.dataimport.DataImporter.getDataSourceInstance(DataImporter.java:374) > > at > > > org.apache.solr.handler.dataimport.ContextImpl.getDataSource(ContextImpl.java:102) > > Caused by: java.lang.ClassNotFoundException: > > org.apache.solr.handler.dataimport.DataSource > > > > The classes in the lib folder don't have access to the class within the > > dist folder in their classpath when they are loaded. > > > > I'd like the keep my solr install separate from my > configs/plugins/indexes > > so I want to avoid putting it into the dist folder unless I absolutely > have > > to. > > If you're going to put jars in $SOLR_HOME/lib, then you should *only* > put jars in that directory, and NOT load jars explicitly. The <lib> > directives should not be used in solrconfig.xml when jars are loaded > from this directory, because Solr will automatically load jars from this > location and make them available to all cores. > > If moving all your extra jars (including things like the dataimport jar) > to $SOLR_HOME/lib and taking out jar loading in solrconfig.xml doesn't > help, then depending on the Solr version, you *might* be running into > SOLR-6188. > > https://issues.apache.org/jira/browse/SOLR-6188 > > You'll want to be sure that you don't the same jar more than once. This > is the root of the specific problem that SOLR-6188 solves. Loading the > same jar more than once can also happen if the jar is in the lib > directory AND mentioned on a <lib> config element. > > Thanks, > Shawn > > -- Mintel Group Ltd | 11 Pilgrim Street | London | EC4V 6RN Registered in England: Number 1475918. | VAT Number: GB 232 9342 72 Contact details for our other offices can be found at http://www.mintel.com/office-locations. This email and any attachments may include content that is confidential, privileged or otherwise protected under applicable law. Unauthorised disclosure, copying, distribution or use of the contents is prohibited and may be unlawful. If you have received this email in error, including without appropriate authorisation, then please reply to the sender about the error and delete this email and any attachments.
