*Thank you Tim, Yes I am able to re-index the site using the command  
[dspace]/bin/dspace index-discovery -b , the solr.log did not show any 
error as shown below:*
2018-10-31 19:15:17,206 INFO  
org.apache.solr.handler.component.QueryElevationComponent @ Loading 
QueryElevation from: /dspace/solr/authority/conf/elevate.xml
2018-10-31 19:15:17,216 INFO  org.apache.solr.core.CoreContainer @ 
registering core: authority
2018-10-31 19:15:17,219 INFO  org.apache.solr.core.SolrCore @ 
QuerySenderListener sending requests to Searcher@35bf5018[authority] 
main{StandardDirectoryReader(segments_1:1:nrt)}
2018-10-31 19:15:17,219 INFO  org.apache.solr.servlet.SolrDispatchFilter @ 
user.dir=/var/lib/tomcat7
2018-10-31 19:15:17,219 INFO  org.apache.solr.servlet.SolrDispatchFilter @ 
SolrDispatchFilter.init() done
2018-10-31 19:15:17,226 INFO  org.apache.solr.core.SolrCore @ [authority] 
webapp=null path=null 
params={q=solr+rocks&distrib=false&start=0&rows=10&event=firstSearcher} 
hits=0 status=0 QTime=7
2018-10-31 19:15:17,263 INFO  org.apache.solr.core.SolrCore @ [authority] 
webapp=null path=null 
params={q=static+firstSearcher+warming+query+from+solrconfig.xml&distrib=false&event=firstSearcher}
 
hits=0 status=0 QTime=36
2018-10-31 19:15:17,263 INFO  org.apache.solr.core.SolrCore @ 
QuerySenderListener done.
2018-10-31 19:15:17,263 INFO  
org.apache.solr.handler.component.SpellCheckComponent @ Loading spell index 
for spellchecker: default
2018-10-31 19:15:17,265 INFO  org.apache.solr.core.SolrCore @ [authority] 
Registered new searcher Searcher@35bf5018[authority] 
main{StandardDirectoryReader(segments_1:1:nrt)}

*but the dspace.log showed the following:*
  ERROR org.dspace.discovery.SolrServiceImpl @ Error while initializing 
solr server
org.apache.solr.client.solrj.SolrServerException: Error executing query
        at 
org.apache.solr.client.solrj.request.QueryRequest.process(QueryRequest.java:100)
        at 
org.apache.solr.client.solrj.SolrServer.query(SolrServer.java:310)
        at 
org.dspace.discovery.SolrServiceImpl.getSolr(SolrServiceImpl.java:159)
        at 
org.dspace.discovery.SolrServiceImpl.search(SolrServiceImpl.java:1604)
        at 
org.dspace.browse.SolrBrowseDAO.getSolrResponse(SolrBrowseDAO.java:201)
        at 
org.dspace.browse.SolrBrowseDAO.doCountQuery(SolrBrowseDAO.java:257)
        at 
org.dspace.browse.BrowseEngine.getTotalResults(BrowseEngine.java:759)
        at 
org.dspace.browse.BrowseEngine.browseByValue(BrowseEngine.java:453)
        at org.dspace.browse.BrowseEngine.browse(BrowseEngine.java:96)
        at 
org.dspace.app.xmlui.aspect.artifactbrowser.ConfigurableBrowse.getBrowseInfo(ConfigurableBrowse.java:859)
        at 
org.dspace.app.xmlui.aspect.artifactbrowser.ConfigurableBrowse.getValidity(ConfigurableBrowse.java:190)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy211.getValidity(Unknown Source)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.getValidityForInternalPipeline(AbstractCachingProcessingPipeline.java:987)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.setupValidities(AbstractCachingProcessingPipeline.java:482)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.setupPipeline(AbstractCachingProcessingPipeline.java:720)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.preparePipeline(AbstractProcessingPipeline.java:466)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.prepareInternal(AbstractProcessingPipeline.java:480)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy205.prepareInternal(Unknown Source)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.init(SitemapSource.java:292)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.<init>(SitemapSource.java:148)
        at 
org.apache.cocoon.components.source.impl.SitemapSourceFactory.getSource(SitemapSourceFactory.java:62)
        at 
org.apache.cocoon.components.source.CocoonSourceResolver.resolveURI(CocoonSourceResolver.java:153)
        at 
org.apache.cocoon.components.source.CocoonSourceResolver.resolveURI(CocoonSourceResolver.java:183)
        at 
org.apache.cocoon.generation.FileGenerator.setup(FileGenerator.java:99)
        at 
org.dspace.app.xmlui.cocoon.AspectGenerator.setup(AspectGenerator.java:81)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy206.setup(Unknown Source)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.setupPipeline(AbstractProcessingPipeline.java:343)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.setupPipeline(AbstractCachingProcessingPipeline.java:710)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.preparePipeline(AbstractProcessingPipeline.java:466)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.prepareInternal(AbstractProcessingPipeline.java:480)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy205.prepareInternal(Unknown Source)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.init(SitemapSource.java:292)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.<init>(SitemapSource.java:148)
        at 
org.apache.cocoon.components.source.impl.SitemapSourceFactory.getSource(SitemapSourceFactory.java:62)
        at 
org.apache.cocoon.components.source.CocoonSourceResolver.resolveURI(CocoonSourceResolver.java:153)
        at 
org.apache.cocoon.components.source.CocoonSourceResolver.resolveURI(CocoonSourceResolver.java:183)
        at 
org.apache.cocoon.generation.FileGenerator.setup(FileGenerator.java:99)
        at 
org.dspace.app.xmlui.cocoon.AspectGenerator.setup(AspectGenerator.java:81)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy206.setup(Unknown Source)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.setupPipeline(AbstractProcessingPipeline.java:343)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.setupPipeline(AbstractCachingProcessingPipeline.java:710)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.preparePipeline(AbstractProcessingPipeline.java:466)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.prepareInternal(AbstractProcessingPipeline.java:480)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy205.prepareInternal(Unknown Source)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.init(SitemapSource.java:292)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.<init>(SitemapSource.java:148)
        at 
org.apache.cocoon.components.source.impl.SitemapSourceFactory.getSource(SitemapSourceFactory.java:62)
        at 
org.apache.cocoon.components.source.CocoonSourceResolver.resolveURI(CocoonSourceResolver.java:153)
        at 
org.apache.cocoon.components.source.CocoonSourceResolver.resolveURI(CocoonSourceResolver.java:183)
        at 
org.apache.cocoon.generation.FileGenerator.setup(FileGenerator.java:99)
        at 
org.dspace.app.xmlui.cocoon.AspectGenerator.setup(AspectGenerator.java:81)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy206.setup(Unknown Source)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.setupPipeline(AbstractProcessingPipeline.java:343)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.setupPipeline(AbstractCachingProcessingPipeline.java:710)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.preparePipeline(AbstractProcessingPipeline.java:466)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.prepareInternal(AbstractProcessingPipeline.java:480)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy205.prepareInternal(Unknown Source)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.init(SitemapSource.java:292)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.<init>(SitemapSource.java:148)
        at 
org.apache.cocoon.components.source.impl.SitemapSourceFactory.getSource(SitemapSourceFactory.java:62)
        at 
org.apache.cocoon.components.source.CocoonSourceResolver.resolveURI(CocoonSourceResolver.java:153)
        at 
org.apache.cocoon.components.source.CocoonSourceResolver.resolveURI(CocoonSourceResolver.java:183)
        at 
org.apache.cocoon.generation.FileGenerator.setup(FileGenerator.java:99)
        at 
org.dspace.app.xmlui.cocoon.AspectGenerator.setup(AspectGenerator.java:81)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy206.setup(Unknown Source)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.setupPipeline(AbstractProcessingPipeline.java:343)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.setupPipeline(AbstractCachingProcessingPipeline.java:710)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.preparePipeline(AbstractProcessingPipeline.java:466)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.prepareInternal(AbstractProcessingPipeline.java:480)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy205.prepareInternal(Unknown Source)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.init(SitemapSource.java:292)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.<init>(SitemapSource.java:148)
        at 
org.apache.cocoon.components.source.impl.SitemapSourceFactory.getSource(SitemapSourceFactory.java:62)
        at 
org.apache.cocoon.components.source.CocoonSourceResolver.resolveURI(CocoonSourceResolver.java:153)
        at 
org.apache.cocoon.components.source.CocoonSourceResolver.resolveURI(CocoonSourceResolver.java:183)
        at 
org.apache.cocoon.generation.FileGenerator.setup(FileGenerator.java:99)
        at 
org.dspace.app.xmlui.cocoon.AspectGenerator.setup(AspectGenerator.java:81)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy206.setup(Unknown Source)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.setupPipeline(AbstractProcessingPipeline.java:343)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.setupPipeline(AbstractCachingProcessingPipeline.java:710)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.preparePipeline(AbstractProcessingPipeline.java:466)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.prepareInternal(AbstractProcessingPipeline.java:480)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy205.prepareInternal(Unknown Source)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.init(SitemapSource.java:292)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.<init>(SitemapSource.java:148)
        at 
org.apache.cocoon.components.source.impl.SitemapSourceFactory.getSource(SitemapSourceFactory.java:62)
        at 
org.apache.cocoon.components.source.CocoonSourceResolver.resolveURI(CocoonSourceResolver.java:153)
        at 
org.apache.cocoon.components.source.CocoonSourceResolver.resolveURI(CocoonSourceResolver.java:183)
        at 
org.apache.cocoon.generation.FileGenerator.setup(FileGenerator.java:99)
        at 
org.dspace.app.xmlui.cocoon.AspectGenerator.setup(AspectGenerator.java:81)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy206.setup(Unknown Source)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.setupPipeline(AbstractProcessingPipeline.java:343)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.setupPipeline(AbstractCachingProcessingPipeline.java:710)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.preparePipeline(AbstractProcessingPipeline.java:466)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.prepareInternal(AbstractProcessingPipeline.java:480)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy205.prepareInternal(Unknown Source)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.init(SitemapSource.java:292)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.<init>(SitemapSource.java:148)
        at 
org.apache.cocoon.components.source.impl.SitemapSourceFactory.getSource(SitemapSourceFactory.java:62)
        at 
org.apache.cocoon.components.source.CocoonSourceResolver.resolveURI(CocoonSourceResolver.java:153)
        at 
org.apache.cocoon.components.source.CocoonSourceResolver.resolveURI(CocoonSourceResolver.java:183)
        at 
org.apache.cocoon.generation.FileGenerator.setup(FileGenerator.java:99)
        at 
org.dspace.app.xmlui.cocoon.AspectGenerator.setup(AspectGenerator.java:81)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy206.setup(Unknown Source)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.setupPipeline(AbstractProcessingPipeline.java:343)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.setupPipeline(AbstractCachingProcessingPipeline.java:710)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.preparePipeline(AbstractProcessingPipeline.java:466)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.prepareInternal(AbstractProcessingPipeline.java:480)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy205.prepareInternal(Unknown Source)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.init(SitemapSource.java:292)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.<init>(SitemapSource.java:148)
        at 
org.apache.cocoon.components.source.impl.SitemapSourceFactory.getSource(SitemapSourceFactory.java:62)
        at 
org.apache.cocoon.components.source.CocoonSourceResolver.resolveURI(CocoonSourceResolver.java:153)
        at 
org.apache.cocoon.components.source.CocoonSourceResolver.resolveURI(CocoonSourceResolver.java:183)
        at 
org.apache.cocoon.generation.FileGenerator.setup(FileGenerator.java:99)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy206.setup(Unknown Source)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.setupPipeline(AbstractProcessingPipeline.java:343)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.setupPipeline(AbstractCachingProcessingPipeline.java:710)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.preparePipeline(AbstractProcessingPipeline.java:466)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:411)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy205.process(Unknown Source)
        at com.sun.proxy.$Proxy202.service(Unknown Source)
Caused by: org.apache.http.ParseException: Invalid content type:
        at org.apache.http.entity.ContentType.parse(ContentType.java:273)
        at 
org.apache.solr.client.solrj.impl.HttpSolrServer.executeMethod(HttpSolrServer.java:496)
        at 
org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:210)
        at 
org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:206)
        at 
org.apache.solr.client.solrj.request.QueryRequest.process(QueryRequest.java:91)
        ... 290 more

>

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