Thanks for answering.
I run my Hadoop in single node, not cluster mode.
On Thu, Apr 30, 2009 at 11:21 AM, jason hadoop jason.had...@gmail.com wrote:
You need to make sure that the shared library is available on the
tasktracker nodes, either by installing it, or by pushing it around via the
put your .so file in every traker's Hadoop-install/lib/native/Linux-xxx-xx/
Or
In your code,try to do
String oldPath=System.getProperty(java.library.path);
System.setProperty(java.library.path, oldPath==null?
local_path_of_lib_file:oldPath+pathSeparator +local_path_of_lib_file))
Does hadoop now support jni calls in Mappers or Reducers? If yes, how? If
not, I think we should create a jira issue for supporting that.
On 09-4-30 下午4:02, Ian jonhson jonhson@gmail.com wrote:
Thanks for answering.
I run my Hadoop in single node, not cluster mode.
On Thu, Apr
Razen Alharbi wrote:
Thanks everybody,
The issue was that hadoop writes all the outputs to stderr instead of stdout
and i don't know why. I would really love to know why the usual hadoop job
progress is written to stderr.
because there is a line in log4.properties telling it to do just that?
Hi Jason,
when will the full version of your book be available??
On Thu, Apr 30, 2009 at 8:51 AM, jason hadoop jason.had...@gmail.comwrote:
You need to make sure that the shared library is available on the
tasktracker nodes, either by installing it, or by pushing it around via the
2009/4/30 He Yongqiang heyongqi...@software.ict.ac.cn:
put your .so file in every traker's Hadoop-install/lib/native/Linux-xxx-xx/
Or
In your code,try to do
String oldPath=System.getProperty(java.library.path);
System.setProperty(java.library.path, oldPath==null?
You mean that the current hadoop does not support JNI calls, right?
Are there any solution to achieve the calls from C interfaces?
2009/4/30 He Yongqiang heyongqi...@software.ict.ac.cn:
Does hadoop now support jni calls in Mappers or Reducers? If yes, how? If
not, I think we should create a
First thing I would do is to run the job in the local jobrunner (as a single
process on your local machine without involving the cluster):
JobConf conf = .
// set other params, mapper, etc. here
conf.set(mapred.job.tracker, local); // use localjobrunner
conf.set(fs.default.name, file:///); //
So you want a different -Dfoo=test on each node? It's probably grabbing
the setting from the node where the job was submitted, and this overrides
the settings on each task node.
Try adding finaltrue/final to the property block on the tasktrackers,
then restart Hadoop and try again. This will
Another way to do this would be to set a property in the Hadoop config itself.
In the job launcher you would have something like:
JobConf conf = ...
conf.setProperty(foo, test);
Then you can read the property in your map or reduce task.
Tom
On Thu, Apr 30, 2009 at 3:25 PM, Aaron Kimball
Has anyone seen this before? Our task tracker produced a 2.7 gig log
file in a few hours. The entry is all the same (every 2 ms):
2009-04-30 02:34:40,207 INFO org.apache.hadoop.mapred.TaskTracker:
Resending 'status' to 'ec2-xx-xx-xx-xx.compute-1.amazonaws.com' with
reponseId '5341
Alex Loddengaard wrote:
I'm confused. Why are you trying to stop things when you're bringing the
name node back up? Try running start-all.sh instead.
Alex
Won't that try to start the daemons on the slave nodes again? They're
already running.
M
On Tue, Apr 28, 2009 at 4:00 PM, Mayuran
Hi Lance,
Can I ask what version you were running when you saw this? Is it
reproducible? I'm trying to look at the code path that might produce such a
behavior and want to make sure I'm looking at the right version.
Thanks
-Todd
On Thu, Apr 30, 2009 at 9:33 AM, Lance Riedel la...@dotspots.com
I have not been able to reproduce. We are using version 19.1 with the
following patches:
4780-2v19.patch (Jira 4780)
closeAll3.patch (Jira 3998)
Thanks,
Lance
On Apr 30, 2009, at 10:40 AM, Todd Lipcon wrote:
Hi Lance,
Can I ask what version you were running when you saw this? Is it
Hey Lance,
Did you see any error messages in the JobTracker logs around the time this
started? I think I understand how this might happen.
Thanks,
-Todd
On Thu, Apr 30, 2009 at 10:45 AM, Lance Riedel la...@dotspots.com wrote:
I have not been able to reproduce. We are using version 19.1 with
Here are the job tracker logs from the same time (and yes.. there is
something there!!):
2009-04-30 02:34:28,484 INFO org.apache.hadoop.mapred.JobTracker:
Serious problem. While updating status, cannot find taskid
attempt_200904291917_0252_r_03_0
2009-04-30 02:34:40,215 INFO
Hey Lance,
Thanks for the logs. They definitely confirmed my suspicion. There are two
problems here:
1) If the JobTracker throws an exception during processing of a heartbeat,
the tasktracker retries with no delay, since lastHeartbeat isn't updated in
TaskTracker.offerService. This is related to
On 4/30/09 10:18 AM, Mayuran Yogarajah mayuran.yogara...@casalemedia.com
wrote:
Alex Loddengaard wrote:
I'm confused. Why are you trying to stop things when you're bringing the
name node back up? Try running start-all.sh instead.
Alex
Won't that try to start the daemons on the
Hi. I had difficulties in getting Reduce sorting to wor - it took me a good art
of a day to figure out what was going wrong, so I'm sharing this in hopes of
earning something from the community or getting hadoop improved to avoid thisind
of error for future users.
I have 2 key classes, one holds
Hi - I have a classpath question.
In hadoop, one can define the Java classes to be used for Keys and Values. I
am doing this. When I make my giant Jar file holding everything needed for
running my application, I include these classes.
However, I've discovered that that is not enough it seems
If you use custom key types, you really should be defining a
RawComparator. It will perform much much better.
-- Owen
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