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From Avery Ching <ach...@apache.org>
Subject Re: more concurrency issues with requests management?
Date Tue, 19 Feb 2013 22:45:08 GMT
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?
>>>
>>
>


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