Error - Rebuild search index with django-oscar and Solr - django

Question

I'm following the django documentation to integrate solr with django-Oscar.I'm getting the following error when trying to rebuild the index.How can I fix this issue?
$python3 manage.py rebuild_index --noinput
Removing all documents from your index because you said so.
Failed to clear Solr index: Solr responded with an error (HTTP 500): [Reason: Error 500 {msg=SolrCore 'collection1' is not available due to init failure: Schema Parsing Failed: unknown field 'id'. Schema file is /project/solr-4.7.2/example/solr/collection1/schema.xml,trace=org.apache.solr.common.SolrException: SolrCore 'collection1' is not available due to init failure: Schema Parsing Failed: unknown field 'id'. Schema file is /project/solr-4.7.2/example/solr/collection1/schema.xml
at org.apache.solr.core.CoreContainer.getCore(CoreContainer.java:827)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:305)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:205)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1419)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:455)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
at org.eclipse.jetty.server.Server.handle(Server.java:368)
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489)
at org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:53)
at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:953)
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1014)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:861)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:240)
at org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:72)
at org.eclipse.jetty.server.bio.SocketConnector$ConnectorEndPoint.run(SocketConnector.java:264)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.solr.common.SolrException: Schema Parsing Failed: unknown field 'id'. Schema file is /project/solr-4.7.2/example/solr/collection1/schema.xml
at org.apache.solr.schema.IndexSchema.readSchema(IndexSchema.java:618)
at org.apache.solr.schema.IndexSchema.(IndexSchema.java:166)
at org.apache.solr.schema.IndexSchemaFactory.create(IndexSchemaFactory.java:55)
at org.apache.solr.schema.IndexSchemaFactory.buildIndexSchema(IndexSchemaFactory.java:69)
at org.apache.solr.core.CoreContainer.createFromLocal(CoreContainer.java:559)
at org.apache.solr.core.CoreContainer.create(CoreContainer.java:597)
at org.apache.solr.core.CoreContainer$1.call(CoreContainer.java:258)
at org.apache.solr.core.CoreContainer$1.call(CoreContainer.java:250)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
... 1 more
Caused by: java.lang.RuntimeException: unknown field 'id'
at org.apache.solr.schema.IndexSchema.getIndexedField(IndexSchema.java:340)
at org.apache.solr.schema.IndexSchema.readSchema(IndexSchema.java:536)
... 13 more
,code=500}]
Traceback (most recent call last):
File "/home/asanka/.local/lib/python3.5/site-packages/haystack/backends/solr_backend.py", line 105, in clear
self.conn.delete(q='*:*', commit=commit)
File "/home/asanka/.local/lib/python3.5/site-packages/pysolr.py", line 948, in delete
return self._update(m, commit=commit, softCommit=softCommit, waitFlush=waitFlush, waitSearcher=waitSearcher, handler=handler)
File "/home/asanka/.local/lib/python3.5/site-packages/pysolr.py", line 488, in _update
return self._send_request('post', path, message, {'Content-type': 'text/xml; charset=utf-8'})
File "/home/asanka/.local/lib/python3.5/site-packages/pysolr.py", line 403, in _send_request
raise SolrError(error_message % (resp.status_code, solr_message))
pysolr.SolrError: Solr responded with an error (HTTP 500): [Reason: Error 500 {msg=SolrCore 'collection1' is not available due to init failure: Schema Parsing Failed: unknown field 'id'. Schema file is /home/asanka/Music/devBranch/dailyDeal_v3/main_app/solr-4.7.2/example/solr/collection1/schema.xml,trace=org.apache.solr.common.SolrException: SolrCore 'collection1' is not available due to init failure: Schema Parsing Failed: unknown field 'id'. Schema file is /home/asanka/Music/devBranch/dailyDeal_v3/main_app/solr-4.7.2/example/solr/collection1/schema.xml
at org.apache.solr.core.CoreContainer.getCore(CoreContainer.java:827)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:305)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:205)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1419)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:455)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
at org.eclipse.jetty.server.Server.handle(Server.java:368)
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489)
at org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:53)
at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:953)
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1014)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:861)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:240)
at org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:72)
at org.eclipse.jetty.server.bio.SocketConnector$ConnectorEndPoint.run(SocketConnector.java:264)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.solr.common.SolrException: Schema Parsing Failed: unknown field 'id'. Schema file is /home/asanka/Music/devBranch/dailyDeal_v3/main_app/solr-4.7.2/example/solr/collection1/schema.xml
at org.apache.solr.schema.IndexSchema.readSchema(IndexSchema.java:618)
at org.apache.solr.schema.IndexSchema.(IndexSchema.java:166)
at org.apache.solr.schema.IndexSchemaFactory.create(IndexSchemaFactory.java:55)
at org.apache.solr.schema.IndexSchemaFactory.buildIndexSchema(IndexSchemaFactory.java:69)
at org.apache.solr.core.CoreContainer.createFromLocal(CoreContainer.java:559)
at org.apache.solr.core.CoreContainer.create(CoreContainer.java:597)
at org.apache.solr.core.CoreContainer$1.call(CoreContainer.java:258)
at org.apache.solr.core.CoreContainer$1.call(CoreContainer.java:250)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
... 1 more
Caused by: java.lang.RuntimeException: unknown field 'id'
at org.apache.solr.schema.IndexSchema.getIndexedField(IndexSchema.java:340)
at org.apache.solr.schema.IndexSchema.readSchema(IndexSchema.java:536)
... 13 more
,code=500}]
All documents removed.

Answer 1

I had a similar issue. Upon inspecting the solr schema (conf/schema.xml) file I found that <field name="id"> line was repeated (not exactly duplicate, but was definitely repetitive for same name argument).
I deleted the 2nd instance of <field name="id"> and the issue was resolved.
I eventually upgraded solr to 6.6.3 along with latest haystack and the build_schema works correctly now.