Hi Hilly, Seems like you are trying to use an already closed writer. Could you keep the writer open and continue writing to the same indexdirectory using a 'shared' indexwriter 'instance'. To put it as pseudo code Something like a singleton/static indexwriter instance.. almost. -- Open indexwriter and keep open.
accept data from thread1 and write to index using indexwriter [DO NOT CLOSE THE INDEXWRITER HERE] accept data from thread2 and write to index using indexwriter [DO NOT CLOSE THE INDEXWRITER HERE] . . Close IndexWriter -- Would this work/be implementable for your application? -- Anshum Gupta http://ai-cafe.blogspot.com 2010/8/17 xiaoyan Zheng <hillyzh...@gmail.com> > the question is like this： > > when one user is using IndexWirter.addDocument(doc), and another user has > already finished adding part and have closed IndexWirter, then, the first > user embraces the error "ERROR: this IndexWriter is closed", cause both of > them creat the IndexWriter based on RAM by the same sever. > > I followed the error to the lucene source, there is ensureOpen(); in > IndexWirter.addDocument( ), and the error is there, > > protected synchronized final void ensureOpen(boolean includePendingClose) > throws AlreadyClosedException { > if (!isOpen(includePendingClose)) { > throw new AlreadyClosedException("this IndexWriter is closed"); > } > } > how to avoid these kind of error? could lucene check this kind of sitation > by itself? > > > 2010/8/17 xiaoyan Zheng <hillyzh...@gmail.com> > > > > > about RAMDirectory based B/S plantform problem > > > > hello, I just start to use lucene and become confused about RAMDirectory > > based lucene index establishment, the problem is one user use this RAM to > > establish index is ok, but, when it comes to multi user, the results is > not > > correct. when i use synchronized{ writer.writeIndex (...)}, all go > alright. > > but users have to wait. i mean, is that RAM can only be used in single > > thread, esp. writing the index? how to solve it in a B/S plantform? > > > > ============================ > > the detailed test code is like these, very simple, just use jsp: > > > > > > RAMDirectory idx=new RAMDirectory(); > > > > LuceneIndexWriterImpl writer=null; > > writer=LuceneIndexWriterImpl.getInstance(); > > > > //RAM-based lucene index establishment > > > > synchronized(wirter){ > > //if no synchronized the result is not correct > > writer.writeIndex(idx); > > > > } > > > > LuceneIndexReaderImpl luceneReader=new LuceneIndexReaderImpl(idx); > > .... > > .... > > > > out.println("****"); > > for(Integer id :documents.keySet()) > > out.println(id); > > out.println("****"); > > > > =========================== > > result: > > if only one user: out put is correct 7,3 > > > > but two users(if no synchronized): out put may be 0,0 and 4, 0 or other > > unexpected result. > > > > > > Regards > > Hilly > > >
