Greetings, all, i am running. orion 1.5.2 on sun's jre 1.3.1. Recently orion is frequently being crashed after ruuning gor a few days; and sometimes even worse, after i restart orion, it is down immediately. The global-application log file s shows tons of exception for IOException , NullPionterException and SQLException. Could anyone tell me how orion handle exceptions; and under what conditions, orion would be forced to shut down? Could memory leak cause orion down? Our server' OS is windows NT 4.0. your suggestion and help is highly appreciated! hua