Thanks, Harsh. I did not cover the discussion before, what you suggest works.
Hao On Mon, Feb 13, 2012 at 3:32 PM, Harsh J <ha...@cloudera.com> wrote: > Hao, > > This only affects your startup, and once its up you should have no > further issues, and was fixed via > https://issues.apache.org/jira/browse/HDFS-1835. > > This was also previously discussed at > http://search-hadoop.com/m/0n3W12wbQRQ > > As a workaround, you can try adding inside conf/hadoop-env.sh: > > export HADOOP_OPTS="$HADOOP_OPTS -Djava.security.egd=file:/dev/./urandom" > > On Tue, Feb 14, 2012 at 4:51 AM, Hao Lin <hlin0...@gmail.com> wrote: > > Hi, > > > > I am beginning with Hadoop. I have been experiencing a trouble of > waiting a > > long time before I can add (put) my input data to HDFS in Hadoop v0.20.2. > > > > I followed configuration step and format the HDFS. I am able to create > new > > directory but when I am try to add input data set to DFS, I am stuck by a > > very common error: > > > > "java.io.IOException: File ... could only be replicated to 0 nodes, > > instead of 1" > > > > then I use command "hadoop dfsadmin -report", and it says there is 0 > > available datanode. > > > > Usually, I wait for another 5 or 10 minutes and then datanode is ready > and I > > can continue to put on the data file. So is there a way that I could > avoid > > waiting for the 5 minutes? I mean it happens also in the pseudo-cluster > > mode. > > > > Thanks. > > > > -- > > best wishes > > > > Hao Lin (林昊) > > Research Assistant > > School of Electrcial & Computer Eng > > Purdue University, West Lafayette, IN > > Personal Homepage: http://web.ics.purdue.edu/~lin116/ > > > > > > -- > Harsh J > Customer Ops. Engineer > Cloudera | http://tiny.cloudera.com/about > -- best wishes Hao Lin (林昊) Research Assistant School of Electrcial & Computer Eng Purdue University, West Lafayette, IN Personal Homepage: http://web.ics.purdue.edu/~lin116/
