Yes this could be the problem as I testing one regions server vary hard to
find a breaking point with a datanode and 4 task trackers on the same
server.
The server is only a dual 2.4Ghz with 4Gb memory with a 147GB SCSI 10K rpm
drive
I got 16 threads on 4 server includeing the region server
Thanks for your instructions!
Now i have setup the hbase following the configurations on the machines and i
can startup hbase after hdfs started. But when I use hql to execute some
commands, the error happened. The shell console list many messages below:
Retrying connect to server: /127.0.0.2:6
Hi William,
For TextInputFormat, the keys produced by the input format will be
LongWritables equal to the line number of the input line.
Hope that helps
-Todd
On Thu, 5 Jun 2008, William Clay Moody wrote:
Newbie Question:
I am trying to write a MapReduce from a text file in HDFS into a HBa
Newbie Question:
I am trying to write a MapReduce from a text file in HDFS into a HBase
table. I am getting the following run-time error
08/06/05 17:24:08 INFO mapred.JobClient: Task Id :
task_200806041619_0009_m_01_0, Status : FAILED
java.lang.ClassCastException: org.apache.hadoop.io.L
晋光峰 wrote:
So my questions are:
1, Do i need to install hbase software on all the four machines?
Yes.
2, Is the configuration parameters in hbase master node are same as
hbase region server node?
Yes.
3, Is hbase-0.1.2 support lates hadoop-0.17.0?
No. HBase runs
> Dears,
>
> now i'm try to using hbase on hadoop. I have developed the source code
> running on single machine, and hbase/hadoop working fine.
>
> now I try to move the program to mutiple node. The machines are organized
> like this:
> machine 1: act as namenode and jobtracker
> machine
We'll see issues like the below and the issue you reported subsequently
about regionservers sleeping 10x longer than scheduled sleep time when
hosts are heavily loaded (Lots of heavy duty MR jobs running on hosts
that are also carrying regionservers and datanodes). Is this the case
with your m
Also I get these after the hangs
2008-06-05 03:33:28,609 WARN org.apache.hadoop.hbase.util.Sleeper: We slept
74521ms, ten times longer than scheduled: 3000
I see the below error a lot when the region server seams to just stop and
wait a few secs to a min then it go's on like nothing happened sometimes
hangeing my MR task but these errors are the only thing I can find wrong.
Any one know any more about this error?
2008-06-05 03:16:03,666 ERROR org
