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From Eli Reisman <apache.mail...@gmail.com>
Subject Re: more concurrency issues with requests management?
Date Wed, 20 Feb 2013 23:41:16 GMT
I do know when you run out of memory it often looks like the logs are fine,
or seem to end in a wierd spot, but really the last X number of log
messages just doesn't get logged. Sometimes its worth looking at the worker
logs individually and one in every group of them will actually get a
sensible exception message logged. Don't know if thats the case though. I
would tend to agree with your intuition regarding the queues and
concurrency.

On Tue, Feb 19, 2013 at 3:04 PM, Claudio Martella <
claudio.martella@gmail.com> wrote:

> Looking at the second line of the logs, it does not look like the case, but
> it could be. do you have any suggestion for the flags in particular? I'm
> running with -XX:+HeapDumpOnOutOfMemoryError  now, and I don't get any
> dump.
>
> It could be the case, but the behavior is quite consistent currently, I'd
> get a Child error/OOM pretty soon in these cases.
>
>
> On Tue, Feb 19, 2013 at 11:45 PM, Avery Ching <aching@apache.org> wrote:
>
> > Can you add GC flags?  Perhaps you are running into full GCs...
> >
> >
> > On 2/19/13 1:45 PM, Claudio Martella wrote:
> >
> >> I have not investigated further yet, but this does not look connected to
> >> ZK, but mostly to some concurrency on the queues. The number of requests
> >> stays to 29...
> >>
> >>
> >> On Tue, Feb 19, 2013 at 9:58 PM, Sebastian Schelter <ssc@apache.org>
> >> wrote:
> >>
> >>  For me, Giraph on Hadoop 1.0.4 runs into some kind of deadlock after
> the
> >>> input was loaded when using it with 200 workers on a billion-scale
> >>> graph....
> >>>
> >>> I tried several versions of zookeeper, but nothing helped.
> >>>
> >>> Best,
> >>> Sebastian
> >>>
> >>>
> >>> On 19.02.2013 21:55, Claudio Martella wrote:
> >>>
> >>>> I'm running PR with trunk on yahoo webgraph across 528 workers and I
> get
> >>>> the workers hanging at the flushing:
> >>>>
> >>>> 2013-02-19 21:40:07,187 INFO
> org.apache.giraph.graph.**ComputeCallable:
> >>>>
> >>> call:
> >>>
> >>>> Computation took 28.386961 secs for 95 partitions on superstep 0.
> >>>>
> >>>   Flushing
> >>>
> >>>> started
> >>>> 2013-02-19 21:40:07,604 INFO org.apache.giraph.worker.**
> >>>> BspServiceWorker:
> >>>> finishSuperstep: Waiting on all requests, superstep 0 Memory
> >>>> (free/total/max) = 5993.42M / 8661.44M / 14346.69M
> >>>> 2013-02-19 21:40:07,605 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 558 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 6.4758, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0, MBytesSent = 175.3834, MBytesReceived = 0.0003, ave sent req
> MBytes =
> >>>> 0.2998, ave received req MBytes = 0, secs waited = 27.083
> >>>> 2013-02-19 21:40:26,717 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 39 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 3.7965, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0.0001, MBytesSent = 175.3834, MBytesReceived = 0.0068, ave sent req
> >>>>
> >>> MBytes
> >>>
> >>>> = 0.2998, ave received req MBytes = 0, secs waited = 46.195
> >>>> 2013-02-19 21:40:32,248 INFO
> >>>> org.apache.giraph.comm.netty.**handler.RequestDecoder: decode: Server
> >>>>
> >>> window
> >>>
> >>>> metrics MBytes/sec sent = 0.0002, MBytes/sec received = 3.9824,
> >>>>
> >>> MBytesSent
> >>>
> >>>> = 0.0066, MBytesReceived = 155.4787, ave sent req MBytes = 0, ave
> >>>>
> >>> received
> >>>
> >>>> req MBytes = 0.0155, secs waited = 39.04
> >>>> 2013-02-19 21:40:42,041 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 36 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 2.8509, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0.0001, MBytesSent = 175.3834, MBytesReceived = 0.0068, ave sent req
> >>>>
> >>> MBytes
> >>>
> >>>> = 0.2998, ave received req MBytes = 0, secs waited = 61.519
> >>>> 2013-02-19 21:41:07,456 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 2.0174, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0.0001, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> >>>>
> >>> MBytes
> >>>
> >>>> = 0.2998, ave received req MBytes = 0, secs waited = 86.933
> >>>> 2013-02-19 21:41:22,456 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 1.7205, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0.0001, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> >>>>
> >>> MBytes
> >>>
> >>>> = 0.2998, ave received req MBytes = 0, secs waited = 101.934
> >>>> 2013-02-19 21:41:37,457 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 1.4998, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0.0001, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> >>>>
> >>> MBytes
> >>>
> >>>> = 0.2998, ave received req MBytes = 0, secs waited = 116.935
> >>>> 2013-02-19 21:41:52,458 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 1.3293, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0.0001, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> >>>>
> >>> MBytes
> >>>
> >>>> = 0.2998, ave received req MBytes = 0, secs waited = 131.936
> >>>> 2013-02-19 21:42:22,459 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 1.083, MBytes/sec
> received
> >>>> =
> >>>> 0, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> MBytes =
> >>>> 0.2998, ave received req MBytes = 0, secs waited = 161.937
> >>>> 2013-02-19 21:42:37,460 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 0.9912, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> MBytes =
> >>>> 0.2998, ave received req MBytes = 0, secs waited = 176.938
> >>>> 2013-02-19 21:43:07,461 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 0.8475, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> MBytes =
> >>>> 0.2998, ave received req MBytes = 0, secs waited = 206.939
> >>>> 2013-02-19 21:43:37,462 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 0.7402, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> MBytes =
> >>>> 0.2998, ave received req MBytes = 0, secs waited = 236.94
> >>>> 2013-02-19 21:43:52,463 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 0.6961, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> MBytes =
> >>>> 0.2998, ave received req MBytes = 0, secs waited = 251.941
> >>>> 2013-02-19 21:44:07,464 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 0.657, MBytes/sec
> received
> >>>> =
> >>>> 0, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> MBytes =
> >>>> 0.2998, ave received req MBytes = 0, secs waited = 266.942
> >>>> 2013-02-19 21:44:37,465 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 0.5906, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> MBytes =
> >>>> 0.2998, ave received req MBytes = 0, secs waited = 296.943
> >>>> 2013-02-19 21:45:07,466 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 0.5364, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> MBytes =
> >>>> 0.2998, ave received req MBytes = 0, secs waited = 326.944
> >>>> 2013-02-19 21:45:22,467 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 0.5129, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> MBytes =
> >>>> 0.2998, ave received req MBytes = 0, secs waited = 341.945
> >>>> 2013-02-19 21:45:37,468 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 0.4913, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> MBytes =
> >>>> 0.2998, ave received req MBytes = 0, secs waited = 356.946
> >>>> 2013-02-19 21:46:07,469 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 0.4532, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> MBytes =
> >>>> 0.2998, ave received req MBytes = 0, secs waited = 386.947
> >>>> 2013-02-19 21:46:22,470 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 0.4363, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> MBytes =
> >>>> 0.2998, ave received req MBytes = 0, secs waited = 401.948
> >>>> 2013-02-19 21:46:52,471 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 0.406, MBytes/sec
> received
> >>>> =
> >>>> 0, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> MBytes =
> >>>> 0.2998, ave received req MBytes = 0, secs waited = 431.949
> >>>> 2013-02-19 21:47:07,472 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 0.3924, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> MBytes =
> >>>> 0.2998, ave received req MBytes = 0, secs waited = 446.95
> >>>> 2013-02-19 21:47:37,473 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 0.3677, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> MBytes =
> >>>> 0.2998, ave received req MBytes = 0, secs waited = 476.951
> >>>> 2013-02-19 21:48:07,474 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 0.346, MBytes/sec
> received
> >>>> =
> >>>> 0, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> MBytes =
> >>>> 0.2998, ave received req MBytes = 0, secs waited = 506.952
> >>>> 2013-02-19 21:48:22,475 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 0.336, MBytes/sec
> received
> >>>> =
> >>>> 0, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> MBytes =
> >>>> 0.2998, ave received req MBytes = 0, secs waited = 521.953
> >>>> 2013-02-19 21:48:52,476 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 0.3177, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> MBytes =
> >>>> 0.2998, ave received req MBytes = 0, secs waited = 551.954
> >>>> 2013-02-19 21:49:07,477 INFO org.apache.giraph.comm.netty.**
> >>>> NettyClient:
> >>>> waitSomeRequests: Waiting interval of 15000 msecs, 29 open requests,
> >>>> waiting for it to be <= 0, MBytes/sec sent = 0.3093, MBytes/sec
> received
> >>>>
> >>> =
> >>>
> >>>> 0, MBytesSent = 175.3834, MBytesReceived = 0.0069, ave sent req
> MBytes =
> >>>> 0.2998, ave received req MBytes = 0, secs waited = 566.955
> >>>>
> >>>> It looks similar to the problem we had earlier with concurrency.
> >>>>
> >>>> Are you guys experiencing something similar at large-scale?
> >>>>
> >>>>
> >>>
> >>
> >
>
>
> --
>    Claudio Martella
>    claudio.martella@gmail.com
>

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