I have a custom class extending UpdateRequestProcessorFactory doing some work on a document when it gets added to the index. This was working fine in v4.10.3 in standalone Solr. I moved to SolrCloud v5.2 and it throws this error when adding the Collection (node):
ERROR - 2015-06-14 12:25:11.071; [ docs_shard1_replica1] org.apache.solr.common.SolrException; org.apache.solr.common.SolrException: Error CREATEing SolrCore 'docs_shard1_replica1': Unable to create core [docs_shard1_replica1] Caused by: class com.example.solr.update.processor.SelfTaggerUpdateProcessorFactory
at org.apache.solr.handler.admin.CoreAdminHandler.handleCreateAction(CoreAdminHandler.java:661)
at org.apache.solr.handler.admin.CoreAdminHandler.handleRequestInternal(CoreAdminHandler.java:213)
at org.apache.solr.handler.admin.CoreAdminHandler.handleRequestBody(CoreAdminHandler.java:193)
at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:143)
at org.apache.solr.servlet.HttpSolrCall.handleAdminRequest(HttpSolrCall.java:646)
at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:417)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:227)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:196)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
at org.eclipse.jetty.server.Server.handle(Server.java:497)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.solr.common.SolrException: Unable to create core [docs_shard1_replica1]
at org.apache.solr.core.CoreContainer.create(CoreContainer.java:651)
at org.apache.solr.core.CoreContainer.create(CoreContainer.java:611)
at org.apache.solr.handler.admin.CoreAdminHandler.handleCreateAction(CoreAdminHandler.java:628)
... 27 more
Caused by: org.apache.solr.common.SolrException: Error Instantiating UpdateRequestProcessorFactory, com.example.solr.update.processor.SelfTaggerUpdateProcessorFactory failed to instantiate org.apache.solr.update.processor.UpdateRequestProcessorFactory
at org.apache.solr.core.SolrCore.<init>(SolrCore.java:815)
at org.apache.solr.core.SolrCore.<init>(SolrCore.java:658)
at org.apache.solr.core.CoreContainer.create(CoreContainer.java:637)
... 29 more
Caused by: org.apache.solr.common.SolrException: Error Instantiating UpdateRequestProcessorFactory, com.example.solr.update.processor.SelfTaggerUpdateProcessorFactory failed to instantiate org.apache.solr.update.processor.UpdateRequestProcessorFactory
at org.apache.solr.core.SolrCore.createInstance(SolrCore.java:587)
at org.apache.solr.core.SolrCore.createInitInstance(SolrCore.java:622)
at org.apache.solr.core.SolrCore.initPlugins(SolrCore.java:2281)
at org.apache.solr.update.processor.UpdateRequestProcessorChain.init(UpdateRequestProcessorChain.java:126)
at org.apache.solr.core.SolrCore.createInitInstance(SolrCore.java:624)
at org.apache.solr.core.SolrCore.initPlugins(SolrCore.java:2265)
at org.apache.solr.core.SolrCore.initPlugins(SolrCore.java:2259)
at org.apache.solr.core.SolrCore.loadUpdateProcessorChains(SolrCore.java:1069)
at org.apache.solr.core.SolrCore.<init>(SolrCore.java:766)
... 31 more
Caused by: java.lang.ClassCastException: class com.example.solr.update.processor.SelfTaggerUpdateProcessorFactory
at java.lang.Class.asSubclass(Class.java:3208)
at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:475)
at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:422)
at org.apache.solr.core.SolrCore.createInstance(SolrCore.java:566)
... 39 more
In solrconfig.xml I have configured like this:
<updateRequestProcessorChain>
<processor class="com.example.solr.update.processor.SelfTaggerUpdateProcessorFactory" lib="custom-libs" version="1">
<arr name="source">
<str>title</str>
<str>desc</str>
<str>subject</str>
<str>content</str>
</arr>
<str name="dest">category</str>
</processor>
...
</updateRequestProcessorChain>
I have tried to add my custom jar in two ways:
server/lib/ folder where all the Jetty jars are located. This fails with Error Instantiating UpdateRequestProcessorFactory.system collection as suggested and then make it available to the <processor /> using the lib and version attributes, which fails with a Caused by: java.lang.ClassNotFoundException: com.example.solr.update.processor.SelfTaggerUpdateProcessorFactoryDoes this Error Instantiating UpdateRequestProcessorFactory exception tell something I don't see? Does the move from standalone to Solrcloud require something for my custom code I missed?
The issue is a classloader issue. I had added my custom jar into the server/lib/ folder.
When I added the Collection, it would instantiate my custom class which needs the UpdateRequestProcessorFactory class but is not available in that classloader.
I solved this by rmoving my jar from server/lib/ and adding this line to solrconfig.xml:
<lib dir="${solr.install.dir:../../..}/custom-libs/" regex="solr-.*\.jar" />
and putting my custom jar in a custom-libs/ folder in ${SOLR_HOME}. This way I make sure that my custom classes are only loaded when the Collection is added, and not before, so they are in the correct classloader.