Segmentation fault (core dumped)

[Tergel Munkhbat]

Hello folks,

I have faced some issues related to Copa schemes.

I would like to run a single congestion control scheme, so I run the below command on my server. However, I got this error - segmentation fault (core dumped)

bc5c5e150c63:~/pantheon$ src/wrappers/copa.py sender  xx.xx.xx.xx 9001

Segmentation fault (core dumped)

Traceback (most recent call last):

  File "src/wrappers/copa.py", line 45, in <module>

    main('do_ss:auto:0.1')

  File "src/wrappers/copa.py", line 41, in main

    check_call(sh_cmd, shell=True, stdout=devnull)

  File "/usr/lib/python2.7/subprocess.py", line 190, in check_call

    raise CalledProcessError(retcode, cmd)

subprocess.CalledProcessError: Command 'export MIN_RTT=1000000 && /home/tergel/pantheon/third_party/genericCC/sender serverip=210.110.206.254 serverport=9001 offduration=1 onduration=1000000 traffic_params=deterministic,num_cycles=1 cctype=markovian delta_conf=do_ss:auto:0.1' returned non-zero exit status 139

Any idea how I could resolve this?

Cheers.

Tergel

[Francis Y. Yan]

Hello Tergel,

Sorry for the delayed response, and I am not sure why Copa doesn't work for you.

What would be the error if you manually run the printed command? Have you tried gdb? You could also consider contacting Copa's authors on this issue.

Best,

Francis

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[Tergel Munkhbat]

Hello Francis,

Greatly appreciate your response. When I manually run the command, it is the same error. Therefore, I will contact Copa authors. Thanks.

Sincerely,

Tergel

[liu yuanyuan]

I ran into the same problem with Copa as follows

Traceback (most recent call last):

  File "/home/liu/pantheon/src/wrappers/copa.py", line 46, in <module

>    main('do_ss:auto:0.1')

  File "/home/liu/pantheon/src/wrappers/copa.py", line 41, in main

    check_call(sh_cmd, shell=True, stdout=devnull)

  File "/usr/lib/python2.7/subprocess.py", line 190, in check_call

    raise CalledProcessError(retcode, cmd)

subprocess.CalledProcessError: Command 'export MIN_RTT=1000000 && /home/liu/pantheon/third_party/genericCC/sender serverip=100.64.0.3 serverport=44099 offduration=1 onduration=1000000 traffic_params=deterministic,num_cycles=1 cctype=markovian delta_conf=do_ss:auto:0.1' returned non-zero exit status 139

How can I solve this problem?

Sincerely,
liuyuan

[Francis Y. Yan]

Sorry I have no idea either -- please contact the Copa authors regarding this issue.

Best,

Francis

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[张毅航]

same problem I meet when I try to run copa schemes

[Xudong Liao]

Hi folks,

I also have encountered this issue and found it may result from the loop of std::map at for (auto x : unacknowledged_packets) . I modified the code to loop and erase by iterator and found the problen solved. The modification is:

auto iter = unacknowledged_packets.begin();

while (iter != unacknowledged_packets.end()){

    auto x = *iter;

    assert(tmp_seq_num <= x.first);

    // some code here

    iter = unacknowledged_packets.erase(iter);

}

Hope this works for you :)

Best,

Xudong

- 

PhD Student from iSING@HKUST