There was a protocol change in 0.5.0 are you sure you are using the 0.5.0 libraries with your sample app?
ben On Thursday 17 August 2006 05:55, Jagadeesh wrote: > Hi All, > > I have been using Hadoop 0.4.0 for the past 1 month with 22 slaves and 1 > master node. So far there are no issues except for the log which I had > already mentioned and I rectified it by configuring log4j. I am very > impressed with this piece of software. > > However when I installed 0.5.0 on a test machine, I noticed some weird > behaviors. I could start the server in stand-alone mode and the app works > if I use the DFS Client to upload and download files. But it just hangs > when I tried connecting from another box using a sample Java app I wrote. > The sample app works in 0.4.0 without any issues. I thought there is > something wrong with the way I have configured Hadoop and tried with > different configurations. Then I understood that, downloading a file using > sample app works in 0.5.0, but it's taking ages for downloading a file of > size 1 KB and most of the time that too doesn't work. > > So I strongly feel the configurations are right as I was able to download > the file even though it took some time. I verified log files and everything > seems to be fine except for the below exception. > > 2006-08-16 12:35:07,214 WARN org.apache.hadoop.dfs.DataNode: DataXCeiver > java.net.SocketException: Connection reset > at java.net.SocketInputStream.read(SocketInputStream.java:168) > at java.io.BufferedInputStream.fill(BufferedInputStream.java:218) > at java.io.BufferedInputStream.read1(BufferedInputStream.java:256) > at java.io.BufferedInputStream.read(BufferedInputStream.java:313) > at java.io.DataInputStream.read(DataInputStream.java:134) > at > org.apache.hadoop.dfs.DataNode$DataXceiver.writeBlock(DataNode.java:720) > at > org.apache.hadoop.dfs.DataNode$DataXceiver.run(DataNode.java:507) at > java.lang.Thread.run(Thread.java:595) > > > I will appreciate any help or pointers to resolve this. I really want to > use 0.5.0 but this error is holding me back. > > Thanks > Jugs
