Hi, I did some research and found an answer from the following url: http://www.gossamer-threads.com/lists/lucene/java-dev/21808?search_string=synchronized%20directory;#21808 So, now I understand that it is partly historical. Cheers, Jian
---------- Forwarded message ---------- From: jian chen <[EMAIL PROTECTED]> Date: Nov 7, 2005 4:17 PM Subject: lucene inter-process locking question To: java-dev@lucene.apache.org Hi, Lucene Developers, Just got a question regarding the locking mechanism in Lucene. I see in IndexReader, first there is synchronized(directory) to synch up multi-threads, then, inside, there is the statement for grabbing the commit.lock . So, my question is, could the multi-thread synch be also done with commit.lock? In other words, I don't understand why synchronized(directory) is there meanwhile commit.lock could do both in and inter-process locking? Could anyone enlighten me about it? Thanks so much in advance, Jian
