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Periodic waves of EOF every 60 seconds. #69

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stevej opened this issue Jun 28, 2017 · 3 comments
Open

Periodic waves of EOF every 60 seconds. #69

stevej opened this issue Jun 28, 2017 · 3 comments

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@stevej
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stevej commented Jun 28, 2017

testing linkerd-tcp with the stock example.yml and slow_cooker at 20k qps is resulting in large waves of EOFs.

Get http://proxy-test-4d:7474: EOF                                                                                                                              [96/25466]
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
2017-06-28T18:53:27Z  19829/0/181 20000  99% 10s   0 [  2   4   5   18 ]   18      0
...
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: read tcp 10.240.0.4:47703->10.240.0.21:7474: read: connection reset by peer
2017-06-28T18:54:27Z  19819/0/181 20000  99% 10s   0 [  2   4   6   14 ]   14      0
...
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
2017-06-28T18:55:27Z  19817/0/182 20000  99% 10s   0 [  1   4   5  206 ]  206      0
...
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
2017-06-28T18:56:27Z  19828/0/172 20000  99% 10s   0 [  2   4   6    9 ]    9      0
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
2017-06-28T18:57:27Z  19839/0/161 20000  99% 10s   0 [  3   5   7    9 ]    9      0

Interestingly, they seem to come in groups of 170-200 at a time about every 60 seconds.
@stevej
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stevej commented Jun 29, 2017

High concurrency even at low qps seems to cause this

stevej@netty-test-8:~$ ./slow_cooker_linux_amd64 -qps 1 -concurrency 1000 http://proxy-test-4d:7474
# sending 1000 GET req/s with concurrency=1000 to http://proxy-test-4d:7474 ...
#                      good/b/f t   goal%   min [p50 p95 p99  p999]  max bhash change
2017-06-29T20:23:24Z   9000/0/0 10000  90% 10s   0 [ 17 105 257  291 ]  291      0 +
2017-06-29T20:23:34Z  10000/0/0 10000 100% 10s   0 [  7  15  16   22 ]   22      0
2017-06-29T20:23:44Z  10051/0/0 10000 100% 10s   0 [ 18  26  26   32 ]   32      0
2017-06-29T20:23:54Z  10272/0/0 10000 100% 10s   1 [ 11  25  26   30 ]   30      0
2017-06-29T20:24:04Z   9772/0/0 10000  97% 10s   0 [ 14  25  26   29 ]   29      0
2017-06-29T20:24:14Z  10004/0/0 10000 100% 10s   1 [ 16  25  26   30 ]   30      0
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
Get http://proxy-test-4d:7474: EOF
...
2017-06-29T20:24:24Z   9729/0/561 10000  97% 10s   1 [ 12  43 209  220 ]  220      0

again at the 1 minute mark.

@wmorgan
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wmorgan commented Jun 29, 2017

egg timer bug

@stevej
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stevej commented Jul 6, 2017

I haven't dug into tcpdump yet but I'll note this doesn't happen when the backends and test client are all on localhost.

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