cms-dev/cms

Contest Management System

Mark Dustin

@mark_dustin_gitlab

I have to setup a cms, i have nothing but heroku, the time is so less, I'm getting no idea, how and where to start. I know this is so dumb and stupid. But please, i'm feeling helpless. Can anybody help me out with a guideline?

Stefano Maggiolo

@stefano-maggiolo

just to make sure, you're talking about CMS, a grader for programming competition or a cms (content management system)?

if the former, please follow https://cms.readthedocs.io/en/v1.4/, if the latter you're in the wrong place

Mark Dustin

@mark_dustin_gitlab

no sir i'm talking about cms which is used in ioi, yes

Stefano Maggiolo

@stefano-maggiolo

ok, sorry about that

then please try to follow the documentation

Mark Dustin

@mark_dustin_gitlab

i read all this, but i think heroku platform is bit different, isn't it?

Stefano Maggiolo

@stefano-maggiolo

I never tried it, but I think I remember somebody using it

anyway, I expect that if you're careful enough to make sure the versions of python and packages are as expected, it should be fine

Edoardo Morassutto

@edomora97

@stefano-maggiolo good idea mocking getaddrinfo as well, implemented and added to the pull-request. Now all the tests pass!

Stefano Maggiolo

@stefano-maggiolo

great

Huseyn Hajiyev

@computerbox_gitlab

hi ! sorry for interrupt . can someone provide me an example how to write checker ?

checker is comparator for output in cms

include <bits/stdc++.h>

include "testlib.h"

using namespace std;

string a, b;

bool is_contains(string a, string b) {
string s = b + "#" + a;
int n = (int) s.length();
vector<int> pi (n);
for (int i=1; i<n; ++i) { int j = pi[i-1]; while (j > 0 && s[i] != s[j])
j = pi[j-1];
if (s[i] == s[j]) ++j;
pi[i] = j;
if (j == b.length()) return true;
}
return false;
}

inline string readAndCheckAnswer(InStream& in) {
string result = in.readLine("[a-z]{1,200000}");
if (is_contains(result, a) && is_contains(result, b)) {
return result;
} else {
in.quitf(_wa, "Output doesn't contain one of the strings.");
}
}

int main(int argc, char* argv[]) {
registerTestlibCmd(argc, argv);
a = inf.readLine();
b = inf.readLine();
string ja = readAndCheckAnswer(ans);
string pa = readAndCheckAnswer(ouf);
if (ja.length() == pa.length()) {
quitf(_ok, "Participant answer: %s", pa.c_str());
} else {
quitf(_ok, "Jury answer: %s\nParticipant answer: %s", ja.c_str(), pa.c_str());
}
}

something like this is right ?

Andrey Vihrov

@andreyv

testlib has examples: https://github.com/MikeMirzayanov/testlib/tree/master/checkers

If you upload the checker manually and it doesn't work, then check that you use CMS's patched version and build with -DCMS

Huseyn Hajiyev

@computerbox_gitlab

thanks

IlleQuiProgrammat

@IlleQuiProgrammat

Hey so I'm currently attempting to set up my contest server and I've been running into a few issues

stats are not updating on the admin page

the ranking server doesn't want to accept the login

(error code 400)

many thanks

FYI everything is on one box

Stefano Maggiolo

@stefano-maggiolo

@IlleQuiProgrammat my money on you using Python 3.5

update to 3.6 and it should work

99044079

@99044079

Hi all

sudo cmsInitDB don't working

help me

[SQL: '\nCREATE TABLE datasets (\n\tid SERIAL NOT NULL, \n\ttask_id INTEGER NOT NULL, \n\tdescription VARCHAR NOT NULL, \n\tautojudge BOOLEAN NOT NULL, \n\ttime_limit FLOAT CHECK (time_limit > 0), \n\tmemory_limit BIGINT CHECK (memory_limit > 0), \n\ttask_type VARCHAR NOT NULL, \n\ttask_type_parameters JSONB NOT NULL, \n\tscore_type VARCHAR NOT NULL, \n\tscore_type_parameters JSONB NOT NULL, \n\tPRIMARY KEY (id), \n\tUNIQUE (task_id, description), \n\tUNIQUE (id, task_id), \n\tFOREIGN KEY(task_id) REFERENCES tasks (id) ON DELETE CASCADE ON UPDATE CASCADE\n)\n\n']

Traceback (most recent call last):
File "/usr/local/lib/python3.6/dist-packages/sqlalchemy/engine/base.py", line 1182, in _execute_context
context)
File "/usr/local/lib/python3.6/dist-packages/sqlalchemy/engine/default.py", line 470, in do_execute
cursor.execute(statement, parameters)
psycopg2.ProgrammingError: type "jsonb" does not exist
LINE 10: task_type_parameters JSONB NOT NULL,

99044079

@99044079

cms is working. However, there is an error adding a task

please help me

Stefano Maggiolo

@stefano-maggiolo

what version of postgres do you have?

jsonb only exists in version 9.4

Andrey Vihrov

@andreyv

Any hope in getting this merged? cms-dev/cms-dev.github.io#15

Edoardo Morassutto

@edomora97

hey! another patch for you cms-dev/cms#1142
Today there was the first round of OIS (the Italian Olympiads in Teams) and for the first time we had to split the contest between first 2 years and last 3 of high school. We used multicontest in order to share the workers between the two contests, but ProxyService messed things up a bit. The rankings were live but without some submissions, after some debugging we found out that PS was not filtering well the submissions of his contest, and because of that it was sending invalid data to RWS, the details are explained in the pull-request.
Not 100% sure this is the correct fix, but we had to hide the ranking for quite a while because of the mistakes there were... If you have better solutions I'm all ears!

Andrey Vihrov

@andreyv

Relevant: https://github.com/cms-dev/cms/pull/1102#issuecomment-488234251

Edoardo Morassutto

@edomora97

Oh, so it was a "known" problem. Too late I suppose? In any case my patch should be less intrusive, even if less powerful

Andrey Vihrov

@andreyv

Sure, just adding that link for context

Edoardo Morassutto

@edomora97

yeah thanks for that, didn't know about that PR. I referenced it from mine for completeness too

Mihail Croitor

@mcroitor

hey, hello! i need your help: the AWS doesnt see any service started. I've checked opened ports:

netstat -plunt
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 127.0.0.1:28000         0.0.0.0:*               LISTEN      32097/python3
tcp        0      0 127.0.0.1:25123         0.0.0.0:*               LISTEN      32127/python3
tcp        0      0 127.0.0.1:21000         0.0.0.0:*               LISTEN      32125/python3
tcp        0      0 127.0.0.1:25000         0.0.0.0:*               LISTEN      32126/python3
tcp        0      0 127.0.0.1:21100         0.0.0.0:*               LISTEN      29756/python3
tcp        0      0 127.0.0.1:26000         0.0.0.0:*               LISTEN      32130/python3
tcp        0      0 127.0.0.1:22000         0.0.0.0:*               LISTEN      32124/python3
tcp        0      0 127.0.0.1:26001         0.0.0.0:*               LISTEN      32131/python3
tcp        0      0 127.0.0.1:26002         0.0.0.0:*               LISTEN      32132/python3
tcp        0      0 127.0.0.1:26003         0.0.0.0:*               LISTEN      32133/python3
tcp        0      0 127.0.0.1:28500         0.0.0.0:*               LISTEN      32129/python3
tcp        0      0 127.0.0.1:26004         0.0.0.0:*               LISTEN      32134/python3
tcp        0      0 127.0.0.1:26005         0.0.0.0:*               LISTEN      32135/python3
tcp        0      0 127.0.0.1:26006         0.0.0.0:*               LISTEN      32136/python3
tcp        0      0 127.0.0.1:26007         0.0.0.0:*               LISTEN      32137/python3
tcp        0      0 127.0.0.1:28600         0.0.0.0:*               LISTEN      32128/python3
tcp        0      0 127.0.0.1:5432          0.0.0.0:*               LISTEN      1500/postgres
tcp6       0      0 :::8888                 :::*                    LISTEN      32125/python3
tcp6       0      0 ::1:5432                :::*                    LISTEN      1500/postgres
tcp6       0      0 :::8889                 :::*                    LISTEN      29756/python3

As you can see, AWS works with IPv6, all other services is on IPv4. Is this the problem for connection establishing? If it is, how I can solve this? Thank you

Mihail Croitor

@mcroitor

thank you, i solved the problem. it was very sophisticated iptables default rules

Andrey Vihrov

@andreyv

I tested -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC with OpenJDK 11. In my experiments it seemed to perform slower than -XX:+UseSerialGC, and used twice as much memory. Not sure what's up with that when it's supposed to be faster.

colll78

@colll78

So cmsScoringService is supposed to update the contest webserver with the submissions scores correct?

For me, in the console it gives operation 'scoring submission x on dataset y' completed successfully

but the webserver still says score: N/A

Stefano Maggiolo

@stefano-maggiolo

might be that the contest configuration doesn't allow contestants to see the score

there's a ranking in AWS that should display all the scores

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include <bits/stdc++.h>

include "testlib.h"