我们有一个运行了一段时间的Ruby on Rails应用程序，但是几天以来，我们在尝试更新任何文档时都遇到了HTTP500错误。系统正在运行Ruby 1.9.3，unicorn 4.8.2和nginx 1.2.1，以及一个sunspot_solr 2.1.1 gem作为搜索索引（还有其他）。
生产日志告诉我，每当有人尝试创建或更新文档时，solr服务器都会引发很多错误。我认为最突出的就是这个：
org.apache.solr.update.DirectUpdateHandler2.addDoc(DirectUpdateHandler2.java:164)\n\t... 30 more\nCaused by: java.lang.OutOfMemoryError: Java heap space\n\
不幸的是，如果我编辑config / sunstpot.yml以包括“ max_memory：1G”，则没有任何变化：
production:
solr:
hostname: localhost
port: 8080
log_level: WARNING
min_memory: 32M
max_memory: 1G
path: /solr-4.10.2/default #production #ollection1 #production
这是完整的production.log条目：
[a086bc878daa0abd367379daade96682] Completed 500 Internal Server Error in 195ms
[a086bc878daa0abd367379daade96682]
RSolr::Error::Http (RSolr::Error::Http - 500 Internal Server Error
Error: {"responseHeader":{"status":500,"QTime":2},"error":{"msg":"Exception writing document id Neuigkeit 393 to the index; possible analysis error.","trace":"org.apache.solr.common.SolrException: Exception writing document id Neuigkeit 393 to the index; possible analysis error.\n\
org.apache.solr.update.DirectUpdateHandler2.addDoc(DirectUpdateHandler2.java:168)\n\
org.apache.solr.update.processor.RunUpdateProcessor.processAdd(RunUpdateProcessorFactory.java:69)\n\tat
org.apache.solr.update.processor.UpdateRequestProcessor.processAdd(UpdateRequestProcessor.java:51)\n\tat
org.apache.solr.update.processor.DistributedUpdateProcessor.doLocalAdd(DistributedUpdateProcessor.java:926)\n\tat
org.apache.solr.update.processor.DistributedUpdateProcessor.versionAdd(DistributedUpdateProcessor.java:1080)\n\tat
org.apache.solr.update.processor.DistributedUpdateProcessor.processAdd(DistributedUpdateProcessor.java:692)\n\tat
org.apache.solr.update.processor.LogUpdateProcessor.processAdd(LogUpdateProcessorFactory.java:100)\n\
org.apache.solr.handler.loader.XMLLoader.processUpdate(XMLLoader.java:247)\n\tat
org.apache.solr.handler.loader.XMLLoader.load(XMLLoader.java:174)\n\
org.apache.solr.handler.UpdateRequestHandler$1.load(UpdateRequestHandler.java:99)\n\tat
org.apache.solr.haa086bc878daa0abd367379daade96682] Completed 500 Internal Server Error in 195ms
[a086bc878daa0abd367379daade96682]
RSolr::Error::Http (RSolr::Error::Http - 500 Internal Server Error
Error: {"responseHeader":{"status":500,"QTime":2},"error":{"msg":"Exception writing document id Neuigkeit 393 to the index; possible analysis error.","trace":"org.apache.solr.common.SolrException: Exception writing document indler.ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:74)\n\
org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)\n\
org.apache.solr.core.SolrCore.execute(SolrCore.java:1967)\n\
org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:777)\n\
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:418)\n\
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:207)\n\
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)\n\
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)\n\
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)\n\
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)\n\
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)\n\
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)\n\
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)\n\
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)\n\
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)\n\
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1003)\n\
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)\n\
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)\n\
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)\n\
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)\n\
java.lang.Thread.run(Thread.java:745)\nCaused by: org.apache.lucene.store.AlreadyClosedException: this IndexWriter is closed\n\
org.apache.lucene.index.IndexWriter.ensureOpen(IndexWriter.java:698)\n\
org.apache.lucene.index.IndexWriter.ensureOpen(IndexWriter.java:712)\n\
org.apache.lucene.index.IndexWriter.updateDocument(IndexWriter.java:1507)\n\
org.apache.solr.update.DirectUpdateHandler2.addDoc0(DirectUpdateHandler2.java:240)\n\
org.apache.solr.update.DirectUpdateHandler2.addDoc(DirectUpdateHandler2.java:164)\n\t... 30 more\nCaused by: java.lang.OutOfMemoryError: Java heap space\n\
org.apache.lucene.index.FreqProxTermsWriterPerField$FreqProxPostingsArray.<init>(FreqProxTermsWriterPerField.java:207)\n\
org.apache.lucene.index.FreqProxTermsWriterPerField$FreqProxPostingsArray.newInstance(FreqProxTermsWriterPerField.java:230)\n\
org.apache.lucene.index.ParallelPostingsArray.grow(ParallelPostingsArray.java:48)\n\
org.apache.lucene.index.TermsHashPerField$PostingsBytesStartArray.grow(TermsHashPerField.java:252)\n\
org.apache.lucene.util.BytesRefHash.add(BytesRefHash.java:292)\n\
org.apache.lucene.index.TermsHashPerField.add(TermsHashPerField.java:151)\n\
org.apache.lucene.index.DefaultIndexingChain$PerField.invert(DefaultIndexingChain.java:659)\n\
org.apache.lucene.index.DefaultIndexingChain.processField(DefaultIndexingChain.java:359)\n\
org.apache.lucene.index.DefaultIndexingChain.processDocument(DefaultIndexingChain.java:318)\n\
org.apache.lucene.index.DocumentsWriterPerThread.updateDocument(DocumentsWriterPerThread.java:239)\n\
org.apache.lucene.index.DocumentsWriter.updateDocument(DocumentsWriter.java:454)\n\
org.apache.lucene.index.IndexWriter.updateDocument(IndexWriter.java:1511)\n\
org.apache.solr.update.DirectUpdateHandler2.addDoc0(DirectUpdateHandler2.java:240)\n\
org.apache.solr.update.DirectUpdateHandler2.addDoc(DirectUpdateHandler2.java:164)\n\
org.apache.solr.update.processor.RunUpdateProcessor.processAdd(RunUpdateProcessorFactory.java:69)\n\
org.apache.solr.update.processor.UpdateRequestProcessor.processAdd(UpdateRequestProcessor.java:51)\n\
org.apache.solr.update.processor.DistributedUpdateProcessor.doLocalAdd(DistributedUpdateProcessor.java:926)\n\
org.apache.solr.update.processor.DistributedUpdateProcessor.versionAdd(DistributedUpdateProcessor.java:1080)\n\
org.apache.solr.update.processor.DistributedUpdateProcessor.processAdd(DistributedUpdateProcessor.java:692)\n\
org.apache.solr.update.processor.LogUpdateProcessor.processAdd(LogUpdateProcessorFactory.java:100)\n\
org.apache.solr.handler.loader.XMLLoader.processUpdate(XMLLoader.java:247)\n\
org.apache.solr.handler.loader.XMLLoader.load(XMLLoader.java:174)\n\
org.apache.solr.handler.UpdateRequestHandler$1.load(UpdateRequestHandler.java:99)\n\
org.apache.solr.handler.ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:74)\n\
org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)\n\
org.apache.solr.core.SolrCore.execute(SolrCore.java:1967)\n\
org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:777)\n\
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:418)\n\
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:207)\n\
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)\n\
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)\n\
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)\n","code":500}}
URI: http://localhost:8080/solr-4.10.2/default/update?wt=json
编辑：我是个白痴。 solr服务器不包含在独角兽服务中。通过“ service tomcat7 restart”重新启动它加载了更新的config / sunstpot.yml并解决了问题。