Nate:
I am fighting to get Giraph built against CDH 4.1.1. Can you
provide the process (mvn flags,) and changes you used to get
your build to work. I can get core to build but examples tests fail
out. But I can get the page rank example in the
core jar to work in some cases.
I get a lot of timeouts with the master worker constantly waiting on
data from the other workers.
On 2/21/2013 11:06 AM, Nate wrote:
I recently upgraded older Giraph code built against CDH3 to a git
checkout from a few days ago that builds against CDH4.1.0 (MRv1)
libraries. All of the Giraph tests pass.
When running my Giraph job with 20 workers, I usually get the above
error in in 19 map processes:
org.apache.giraph.utils.ExpectedBarrier: waitForRequiredPermits:
Waiting for times required to be 19 (currently 18)
One map worker always shows something like:
org.apache.giraph.comm.netty.NettyClient: waitSomeRequests:
Waiting interval of 15000 msecs, 1 open requests, waiting for it
to be <= 0,/and some metrics ..../
org.apache.giraph.comm.netty.NettyClient: waitSomeRequests:
Waiting for request (destTask=17, reqId=5032) -
(reqId=5326,destAddr=host1:30017,elapsedNanos=..., started=...,
writeDone=true, writeSuccess=true)
/repeats/...
I say this happens usually because the same giraph job does complete
but only rarely. I have a timeout of 100 minutes set, and the job is
killed after that much time has elapsed.
Also, the started field in the above output in this past run reads:
"Wed Jan 21 14:21:31 EST 1970" All machines are synchronized by a
single time server and currently read accurate times. I don't think
it affected the execution, but it still seems erroneous.
I also don't see Hadoop maps having status messages set on them. I
see the GraphMapper giving the Context object to the GraphTaskManager
instance, and I can see it calling "context.setStatus(...)" but those
messages never show up in the map status column in the job tracker page.
Is there something I've missed while upgrading the old code?
--
========= mailto:db...@data-tactics.com ============
David W. Boyd
Director, Engineering, Research and Development
Data Tactics Corporation
7901 Jones Branch, Suite 240
Mclean, VA 22102
office: +1-703-506-3735, ext 308
fax: +1-703-506-6703
cell: +1-703-402-7908
============== http://www.data-tactics.com/ ============
The information contained in this message may be privileged
and/or confidential and protected from disclosure.
If the reader of this message is not the intended recipient
or an employee or agent responsible for delivering this message
to the intended recipient, you are hereby notified that any
dissemination, distribution or copying of this communication
is strictly prohibited. If you have received this communication
in error, please notify the sender immediately by replying to
this message and deleting the material from any computer.
