I'm seeing the following behavior, already reported in the past. The scenario that causes it is one where the nutch application is starting up and we have queries coming in already.
in catalina.out: 050709 132712 11 query request from 211.30.2.xx 050709 132712 12 query request from 82.58.45.xx 050709 132712 11 Plugins: looking in: /var/local/nutch/build/plugins 050709 132714 13 query request from 193.77.93.xx And in the error log an ExceptionInInitializerError, happening in the static initializer for QueryFilters, as described here: http://www.mail-archive.com/nutch-developers@lists.sourceforge.net/msg04422.html It seems like there is a race condition: the plugins are not loaded (the parsing plugin messages have not appeared in the log yet), so the code below in QueryFilters.java does not find any extension points and throws the exception: static { try { ExtensionPoint point = PluginRepository.getInstance() .getExtensionPoint(QueryFilter.X_POINT_ID); if (point == null) throw new RuntimeException(QueryFilter.X_POINT_ID+" not found."); ... When this happens, the system will not be able to process any queries since NutchAnalysis.parse will fail every time (QueryFilters is not a valid class). The application will need to be restarted. Diego
