To illustrate the issue I am running into: In the following bash program, I execute 2 suggester index building requests simultaneously with 1 process assigned to each call for a same Solr node:
for i in {0..1} do curl " http://solr:8983/solr/books/books_suggest_en?wt=json&q=DUMMY_SUGGESTER_TERM&suggest=true&suggest.buildAll=true" & done Following is the response that I get back: "responseHeader":{ "status":500, "QTime":152}, "command":"buildAll", "error":{ "msg":"suggester was not built", "trace":"java.lang.IllegalStateException: suggester was not built\n\tat org.apache.lucene.search.suggest.analyzing.AnalyzingInfixSuggester.lookup(AnalyzingInfixSuggester.java:556)\n\tat org.apache.lucene.search.suggest.analyzing.AnalyzingInfixSuggester.lookup(AnalyzingInfixSuggester.java:475)\n\tat org.apache.solr.spelling.suggest.fst.AnalyzingInfixLookupFactory$1.lookup(AnalyzingInfixLookupFactory.java:125)\n\tat org.apache.lucene.search.suggest.analyzing.AnalyzingInfixSuggester.lookup(AnalyzingInfixSuggester.java:464)\n\tat org.apache.lucene.search.suggest.Lookup.lookup(Lookup.java:240)\n\tat org.apache.solr.spelling.suggest.SolrSuggester.getSuggestions(SolrSuggester.java:243)\n\tat org.apache.solr.handler.component.SuggestComponent.process(SuggestComponent.java:263)\n\tat org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:328)\n\tat org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:211)\n\tat org.apache.solr.core.SolrCore.execute(SolrCore.java:2596)\n\tat org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:802)\n\tat org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:579)\n\tat org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:420)\n\tat org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:352)\n\tat org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1596)\n\tat org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:545)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)\n\tat org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:590)\n\tat org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)\n\tat org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1607)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)\n\tat org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1297)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)\n\tat org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:485)\n\tat org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1577)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)\n\tat org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1212)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)\n\tat org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:221)\n\tat org.eclipse.jetty.server.handler.InetAccessHandler.handle(InetAccessHandler.java:177)\n\tat org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146)\n\tat org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)\n\tat org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:322)\n\tat org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)\n\tat org.eclipse.jetty.server.Server.handle(Server.java:500)\n\tat org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:383)\n\tat org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:547)\n\tat org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:375)\n\tat org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:270)\n\tat org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)\n\tat org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)\n\tat org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)\n\tat org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:336)\n\tat org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:313)\n\tat org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171)\n\tat org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:129)\n\tat org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:388)\n\tat org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:806)\n\tat org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:938)\n\tat java.lang.Thread.run(Thread.java:748)\n", "code":500}} { "responseHeader":{ "status":0, "QTime":235}, "command":"buildAll", "suggest":{ "books_suggester_analyzing_infix_en":{ "DUMMY_SUGGESTER_TERM":{ "numFound":0, "suggestions":[]}}, "books_suggester_fuzzy_en":{ "DUMMY_SUGGESTER_TERM":{ "numFound":0, "suggestions":[]}}, "books_suggester_freetext_en":{ "DUMMY_SUGGESTER_TERM":{ "numFound":0, "suggestions":[]}}}} [1]- Done curl " http://solr:8983/solr/books/books_suggest_en?wt=json&q=DUMMY_SUGGESTER_TERM&suggest=true&suggest.buildAll=true " [2]+ Done curl " http://solr:8983/solr/books/books_suggest_en?wt=json&q=DUMMY_SUGGESTER_TERM&suggest=true&suggest.buildAll=true " Following is the setting for the corresponding suggester: <searchComponent class="solr.SuggestComponent" name="books_suggest_en"> <lst name="suggester"> <str name="name">books_suggester_freetext_en</str> <str name="lookupImpl">FreeTextLookupFactory</str> <str name="storeDir"> books_suggester_freetext_en_dir</str> <str name="dictionaryImpl"> DocumentDictionaryFactory</str> <str name="field">book_suggestions_text</str > <str name="suggestFreeTextAnalyzerFieldType">text_en_raw</str> <str name= "ngrams">3</str> <str name="buildOnCommit">false</str> <str name= "buildOnStartup">false</str> </lst> <lst name="suggester"> <str name="name"> books_suggester_fuzzy_en</str> <str name="lookupImpl">FuzzyLookupFactory</ str> <str name="storeDir">books_suggester_fuzzy_en_dir</str> <str name= "dictionaryImpl">DocumentDictionaryFactory</str> <str name="field"> book_suggestions_text</str> <str name="weightField">average_rating</str> < str name="suggestAnalyzerFieldType">text_en_raw</str> <str name="ngrams">3</ str> <str name="buildOnCommit">false</str> <str name="buildOnStartup">false </str> </lst> <lst name="suggester"> <str name="name"> books_suggester_analyzing_infix_en</str> <str name="lookupImpl"> AnalyzingInfixLookupFactory</str> <str name="storeDir"> books_suggester_analyzing_infix_en_dir</str> <str name="dictionaryImpl"> DocumentDictionaryFactory</str> <str name="field">book_suggestions_text</str > <str name="weightField">average_rating</str> <str name="contextField"> book_suggestions_text</str> <str name="suggestAnalyzerFieldType">text_en_raw </str> <str name="exactMatchFirst">true</str> <str name="buildOnCommit"> false</str> <str name="buildOnStartup">false</str> </lst> </searchComponent> <requestHandler class="org.apache.solr.handler.component.SearchHandler" name ="/books_suggest_en"> <lst name="defaults"> <str name="suggest">true</str> < str name="suggest.count">5</str> <str name="suggest.dictionary"> books_suggester_freetext_en</str> <str name="suggest.dictionary"> books_suggester_fuzzy_en</str> <str name="suggest.dictionary"> books_suggester_analyzing_infix_en</str> </lst> <arr name="components"> <str >books_suggest_en</str> </arr> </requestHandler> Is this because it is executed against the same Solr node?