I was wrong. After rebooting tomcat we discovered a new sweetness:
/SEVERE: REFCOUNT ERROR: unreferenced org.apache.solr.core.SolrCore@3c753c75 (core.name) has a reference count of 1 22.07.2011 11:52:07 org.apache.solr.common.SolrException log SEVERE: java.lang.RuntimeException: java.io.IOException: Map failed at org.apache.solr.core.SolrCore.getSearcher(SolrCore.java:1099) at org.apache.solr.core.SolrCore.<init>(SolrCore.java:585) at org.apache.solr.core.CoreContainer.create(CoreContainer.java:463) at org.apache.solr.core.CoreContainer.load(CoreContainer.java:316) at org.apache.solr.core.CoreContainer.load(CoreContainer.java:207) at org.apache.solr.core.CoreContainer$Initializer.initialize(CoreContainer.java:130) at org.apache.solr.servlet.SolrDispatchFilter.init(SolrDispatchFilter.java:94) at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:273) at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:254) at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:372) at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:98) at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4584) at org.apache.catalina.core.StandardContext$2.call(StandardContext.java:5262) at org.apache.catalina.core.StandardContext$2.call(StandardContext.java:5257) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:314) at java.util.concurrent.FutureTask.run(FutureTask.java:149) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:897) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:919) at java.lang.Thread.run(Thread.java:736) Caused by: java.io.IOException: Map failed at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:782) at org.apache.lucene.store.MMapDirectory$MMapIndexInput.<init>(MMapDirectory.java:264) at org.apache.lucene.store.MMapDirectory.openInput(MMapDirectory.java:216) at org.apache.lucene.index.FieldsReader.<init>(FieldsReader.java:129) at org.apache.lucene.index.SegmentCoreReaders.openDocStores(SegmentCoreReaders.java:244) at org.apache.lucene.index.SegmentReader.get(SegmentReader.java:116) at org.apache.lucene.index.SegmentReader.get(SegmentReader.java:92) at org.apache.lucene.index.DirectoryReader.<init>(DirectoryReader.java:113) at org.apache.lucene.index.ReadOnlyDirectoryReader.<init>(ReadOnlyDirectoryReader.java:29) at org.apache.lucene.index.DirectoryReader$1.doBody(DirectoryReader.java:81) at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:750) at org.apache.lucene.index.DirectoryReader.open(DirectoryReader.java:75) at org.apache.lucene.index.IndexReader.open(IndexReader.java:428) at org.apache.lucene.index.IndexReader.open(IndexReader.java:371) at org.apache.solr.core.StandardIndexReaderFactory.newReader(StandardIndexReaderFactory.java:38) at org.apache.solr.core.SolrCore.getSearcher(SolrCore.java:1088) ... 18 more Caused by: java.lang.OutOfMemoryError: Map failed at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:779) ... 33 more/ Any ideas and/or suggestions? Best regards & thank you, Sebastian -- View this message in context: http://lucene.472066.n3.nabble.com/Solr-3-3-Exception-in-thread-Lucene-Merge-Thread-1-tp3185248p3190976.html Sent from the Solr - User mailing list archive at Nabble.com.