Hi Colin， thanks for your reply. Where can I see the new design for BlockReaderLocal class?
Thanks, LiuLei 2012/9/28 Colin McCabe <cmcc...@alumni.cmu.edu> > We don't make very strong guarantees about what happens when clients > read from a deleted file. DFSClients definitely may read data from a > deleted file even if local reads are not enabled. > > Incidentally, BlockReaderLocal is being redesigned to pass file > descriptors rather than paths, which will be more secure and fix some > corner cases surrounding append and local reads. > > cheers, > Colin > > > On Wed, Sep 26, 2012 at 11:19 PM, jlei liu <liulei...@gmail.com> wrote: > > In local read, BlockReaderLocal class use "static Map<Integer, > > LocalDatanodeInfo> localDatanodeInfoMap" property to store local block > file > > path and local meta file path. When I stop HDFS cluster or I kill the > local > > DataNode and delete file use "./hadoop dfs -rm path" command , the > DFSClient > > still can read the data form local file. I think that may lead to > DFSClient > > read wrong data. > > > > I think we should fix the problem. > > > > > > Thanks, > > > > LiuLei >
