http://www.mail-archive.com/core-user@hadoop.apache.org/msg10002.html
On Thu, May 28, 2009 at 3:03 PM, Olivier Smadja <osma...@gmail.com> wrote: > Hi Sacha! > > Thanks for the quick answer. Is there a simple way to search the mailing > list? by text or by author. > > At http://mail-archives.apache.org/mod_mbox/hadoop-core-user/ I only see a > browse per month... > > Thanks, > Olivier > > > On Thu, May 28, 2009 at 10:57 AM, Sasha Dolgy <sdo...@gmail.com> wrote: > >> append isn't supported without modifying the configuration file for >> hadoop. check out the mailling list threads ... i've sent a post in >> the past explaining how to enable it. >> >> On Thu, May 28, 2009 at 2:46 PM, Olivier Smadja <osma...@gmail.com> wrote: >> > Hello, >> > >> > I'm trying hadoop for the first time and I'm just trying to create a file >> > and append some text in it with the following code: >> > >> > >> > import java.io.IOException; >> > >> > import org.apache.hadoop.conf. Configuration; >> > import org.apache.hadoop.fs.FSDataOutputStream; >> > import org.apache.hadoop.fs.FileSystem; >> > import org.apache.hadoop.fs.Path; >> > >> > /** >> > * @author olivier >> > * >> > */ >> > public class HadoopIO { >> > >> > public static void main(String[] args) throws IOException { >> > >> > >> > String directory = "/Users/olivier/tmp/hadoop-data"; >> > Configuration conf = new Configuration(true); >> > Path path = new Path(directory); >> > // Create the File system >> > FileSystem fs = path.getFileSystem(conf); >> > // Sets the working directory >> > fs.setWorkingDirectory(path); >> > >> > System.out.println(fs.getWorkingDirectory()); >> > >> > // Creates a files >> > FSDataOutputStream out = fs.create(new Path("test.txt")); >> > out.writeBytes("Testing hadoop - first line"); >> > out.close(); >> > // then try to append something >> > out = fs.append(new Path("test.txt")); >> > out.writeBytes("Testing hadoop - second line"); >> > out.close(); >> > >> > fs.close(); >> > >> > >> > } >> > >> > } >> > >> > >> > but I receive the following exception: >> > >> > Exception in thread "main" java.io.IOException: Not supported >> > at >> > >> org.apache.hadoop.fs.ChecksumFileSystem.append(ChecksumFileSystem.java:290) >> > at org.apache.hadoop.fs.FileSystem.append(FileSystem.java:525) >> > at com.neodatis.odb.hadoop.HadoopIO.main(HadoopIO.java:38) >> > >> > >> > 1) Can someone tell me what am i doing wrong? >> > >> > 2) How can I update the file (for example, just update the first 10 bytes >> of >> > the file)? >> > >> > >> > Thanks, >> > Olivier >> > >> >> >> >> -- >> Sasha Dolgy >> sasha.do...@gmail.com >> > -- Sasha Dolgy sasha.do...@gmail.com
