Hello. When in solr/home directory exists directory to which solr do not have rights, then solr failed to start with exception:
2108 [main] INFO org.apache.solr.core.CoresLocator - Looking for core definitions underneath /var/lib/solr 2109 [main] ERROR org.apache.solr.servlet.SolrDispatchFilter - Could not start Solr. Check solr/home property and the logs 2138 [main] ERROR org.apache.solr.core.SolrCore - null:java.lang.NullPointerException at org.apache.solr.core.CorePropertiesLocator.discoverUnder(CorePropertiesLocator.java:121) at org.apache.solr.core.CorePropertiesLocator.discoverUnder(CorePropertiesLocator.java:130) at org.apache.solr.core.CorePropertiesLocator.discover(CorePropertiesLocator.java:113) at org.apache.solr.core.CoreContainer.load(CoreContainer.java:226) at org.apache.solr.servlet.SolrDispatchFilter.createCoreContainer(SolrDispatchFilter.java:177) at org.apache.solr.servlet.SolrDispatchFilter.init(SolrDispatchFilter.java:127) at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:295) at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422) at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115) at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3838) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4488) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:526) at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:637) at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:563) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:498) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053) at org.apache.catalina.core.StandardHost.start(StandardHost.java:722) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) at org.apache.catalina.core.StandardService.start(StandardService.java:516) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:593) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:616) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) 2138 [main] INFO org.apache.solr.servlet.SolrDispatchFilter - SolrDispatchFilter.init() done For example: solr/home located on /var/lib/solr. /var/lib/solr is another file system, it has lost+found directory, and only root can read from this directory. As result solr can't to star. It is because discovering directory to which tomcat do not have rights. Yours faithfully.
