CMS，龙卷风中的JSON ValueError

我正在Ubuntu 16.04中运行竞赛管理系统（docs）。 CMS运行相当好，但有时在短返回错误，像这样：CMS，龙卷风中的JSON ValueError

ValueError: No JSON object could be decoded

只怕万一让一切错在包编辑代码，所以请避免这种方法。

这里的错误信息在cmsAdminWebServer：

2016/08/19 22:39:55 - ERROR [AdminWebServer,0] Cannot decode score type parameters. 
ValueError('No JSON object could be decoded',). 
2016/08/19 22:39:55 - ERROR [AdminWebServer,0] Uncaught exception GET /user/3 (127.0.0.1) 
HTTPServerRequest(protocol='http', host='127.0.0.1:8889', method='GET', uri='/user/3', version='HTTP/1.1', remote_ip='127.0.0.1', headers={'Accept-Language': 'en-US,en;q=0.5', 'Accept-Encoding': 'gzip, deflate', 'Connection': 'keep-alive', 'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', 'Upgrade-Insecure-Requests': '1', 'Host': '127.0.0.1:8889', 'Cookie': 'unread_count="2|1:0|10:1471613726|12:unread_count|4:MA==|cb62dfe311f2b0bb4378ad4ba752764da4e2f88314a3aa76969aeec5ba764733"; login="2|1:0|10:1471612630|5:login|68:KFZ5aHVucm9oCnAwClZxd2VydHl1aQpwMQpGMTQ3MTYxMjYzMC44MTA1NzgKdHAyCi4=|a94f16138a54068f9eccc9e2950e7e079ff0523475d8c7f3dde9a2cc0048870b"', 'Referer': 'http://127.0.0.1:8889/userlist/2', 'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:48.0) Gecko/20100101 Firefox/48.0'}) 
Traceback (most recent call last): 
    File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 1332, in _execute 
    result = method(*self.path_args, **self.path_kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/server/AdminWebServer.py", line 1687, in get 
    self.render("user.html", **self.r_params) 
    File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 665, in render 
    html = self.render_string(template_name, **kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 772, in render_string 
    return t.generate(**namespace) 
    File "/usr/local/lib/python2.7/dist-packages/tornado/template.py", line 278, in generate 
    return execute() 
    File "user_html.generated.py", line 375, in _tt_execute 
    score_type = get_score_type(dataset=dataset) # user.html:62 (via base.html:129) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/grading/scoretypes/__init__.py", line 77, in get_score_type 
    parameters = json.loads(parameters) 
    File "/usr/lib/python2.7/json/__init__.py", line 339, in loads 
    return _default_decoder.decode(s) 
    File "/usr/lib/python2.7/json/decoder.py", line 364, in decode 
    obj, end = self.raw_decode(s, idx=_w(s, 0).end()) 
    File "/usr/lib/python2.7/json/decoder.py", line 382, in raw_decode 
    raise ValueError("No JSON object could be decoded") 
ValueError: No JSON object could be decoded 
2016/08/19 22:39:55 - ERROR [AdminWebServer,0] Uncaught exception (ValueError('No JSON object could be decoded',)) while processing a request: Traceback (most recent call last): 
    File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 1332, in _execute 
    result = method(*self.path_args, **self.path_kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/server/AdminWebServer.py", line 1687, in get 
    self.render("user.html", **self.r_params) 
    File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 665, in render 
    html = self.render_string(template_name, **kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 772, in render_string 
    return t.generate(**namespace) 
    File "/usr/local/lib/python2.7/dist-packages/tornado/template.py", line 278, in generate 
    return execute() 
    File "user_html.generated.py", line 375, in _tt_execute 
    score_type = get_score_type(dataset=dataset) # user.html:62 (via base.html:129) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/grading/scoretypes/__init__.py", line 77, in get_score_type 
    parameters = json.loads(parameters) 
    File "/usr/lib/python2.7/json/__init__.py", line 339, in loads 
    return _default_decoder.decode(s) 
    File "/usr/lib/python2.7/json/decoder.py", line 364, in decode 
    obj, end = self.raw_decode(s, idx=_w(s, 0).end()) 
    File "/usr/lib/python2.7/json/decoder.py", line 382, in raw_decode 
    raise ValueError("No JSON object could be decoded") 
ValueError: No JSON object could be decoded 

2016/08/19 22:39:55 - ERROR [AdminWebServer,0] 500 GET /user/3 (127.0.0.1) 35.83ms 
127.0.0.1 - - [2016-08-19 22:39:55] "GET /user/3 HTTP/1.1" 500 4235 0.037082

它，当我尝试看到任何用户的个人资料

在cmsContestWebServer发生：

2016/08/19 22:45:24 - ERROR [ContestWebServer,0] Cannot decode score type parameters. 
ValueError('No JSON object could be decoded',).

和

2016/08/19 22:45:26 - ERROR [ContestWebServer,0] Cannot decode score type parameters. 
ValueError('No JSON object could be decoded',). 
2016/08/19 22:45:26 - ERROR [ContestWebServer,0] Uncaught exception GET /tasks/Hello/submissions/3 (127.0.0.1) 
HTTPServerRequest(protocol='http', host='127.0.0.1:8888', method='GET', uri='/tasks/Hello/submissions/3', version='HTTP/1.1', remote_ip='127.0.0.1', headers={'Accept-Language': 'en-US,en;q=0.5', 'Accept-Encoding': 'gzip, deflate', 'Connection': 'keep-alive', 'Accept': '*/*', 'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:48.0) Gecko/20100101 Firefox/48.0', 'Host': '127.0.0.1:8888', 'X-Requested-With': 'XMLHttpRequest', 'Referer': 'http://127.0.0.1:8888/tasks/Hello/submissions', 'Cookie': 'unread_count="2|1:0|10:1471614324|12:unread_count|4:MA==|29d9493cc5372707a208c1eca6f791069159c152d0afaf5faeba8ed098391a04"; login="2|1:0|10:1471614324|5:login|68:KFZ5aHVucm9oCnAwClZxd2VydHl1aQpwMQpGMTQ3MTYxNDMyNC4yODA5NTgKdHAyCi4=|a2ea45df8688435985f9e1d5dacc23d4c37ae7ff7bf992ea0cb32e5e2f31f530"'}) 
Traceback (most recent call last): 
    File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 1332, in _execute 
    result = method(*self.path_args, **self.path_kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 2601, in wrapper 
    return method(self, *args, **kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/server/__init__.py", line 195, in wrapped 
    return func(self, *args, **kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/server/ContestWebServer.py", line 1283, in get 
    score_type = get_score_type(dataset=task.active_dataset) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/grading/scoretypes/__init__.py", line 77, in get_score_type 
    parameters = json.loads(parameters) 
    File "/usr/lib/python2.7/json/__init__.py", line 339, in loads 
    return _default_decoder.decode(s) 
    File "/usr/lib/python2.7/json/decoder.py", line 364, in decode 
    obj, end = self.raw_decode(s, idx=_w(s, 0).end()) 
    File "/usr/lib/python2.7/json/decoder.py", line 382, in raw_decode 
    raise ValueError("No JSON object could be decoded") 
ValueError: No JSON object could be decoded 
2016/08/19 22:45:26 - ERROR [ContestWebServer,0] Uncaught exception (ValueError('No JSON object could be decoded',)) while processing a request: Traceback (most recent call last): 
    File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 1332, in _execute 
    result = method(*self.path_args, **self.path_kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 2601, in wrapper 
    return method(self, *args, **kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/server/__init__.py", line 195, in wrapped 
    return func(self, *args, **kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/server/ContestWebServer.py", line 1283, in get 
    score_type = get_score_type(dataset=task.active_dataset) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/grading/scoretypes/__init__.py", line 77, in get_score_type 
    parameters = json.loads(parameters) 
    File "/usr/lib/python2.7/json/__init__.py", line 339, in loads 
    return _default_decoder.decode(s) 
    File "/usr/lib/python2.7/json/decoder.py", line 364, in decode 
    obj, end = self.raw_decode(s, idx=_w(s, 0).end()) 
    File "/usr/lib/python2.7/json/decoder.py", line 382, in raw_decode 
    raise ValueError("No JSON object could be decoded") 
ValueError: No JSON object could be decoded 

2016/08/19 22:45:26 - ERROR [ContestWebServer,0] 500 GET /tasks/Hello/submissions/3 (127.0.0.1) 35.07ms 
127.0.0.1 - - [2016-08-19 22:45:26] "GET /tasks/Hello/submissions/3 HTTP/1.1" 500 4775 0.035801 
2016/08/19 22:45:26 - ERROR [ContestWebServer,0] Cannot decode score type parameters. 
ValueError('No JSON object could be decoded',). 
2016/08/19 22:45:26 - ERROR [ContestWebServer,0] Uncaught exception GET /tasks/Hello/submissions/1 (127.0.0.1) 
HTTPServerRequest(protocol='http', host='127.0.0.1:8888', method='GET', uri='/tasks/Hello/submissions/1', version='HTTP/1.1', remote_ip='127.0.0.1', headers={'Accept-Language': 'en-US,en;q=0.5', 'Accept-Encoding': 'gzip, deflate', 'Connection': 'keep-alive', 'Accept': '*/*', 'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:48.0) Gecko/20100101 Firefox/48.0', 'Host': '127.0.0.1:8888', 'X-Requested-With': 'XMLHttpRequest', 'Referer': 'http://127.0.0.1:8888/tasks/Hello/submissions', 'Cookie': 'unread_count="2|1:0|10:1471614324|12:unread_count|4:MA==|29d9493cc5372707a208c1eca6f791069159c152d0afaf5faeba8ed098391a04"; login="2|1:0|10:1471614324|5:login|68:KFZ5aHVucm9oCnAwClZxd2VydHl1aQpwMQpGMTQ3MTYxNDMyNC4yODA5NTgKdHAyCi4=|a2ea45df8688435985f9e1d5dacc23d4c37ae7ff7bf992ea0cb32e5e2f31f530"'}) 
Traceback (most recent call last): 
    File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 1332, in _execute 
    result = method(*self.path_args, **self.path_kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 2601, in wrapper 
    return method(self, *args, **kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/server/__init__.py", line 195, in wrapped 
    return func(self, *args, **kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/server/ContestWebServer.py", line 1283, in get 
    score_type = get_score_type(dataset=task.active_dataset) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/grading/scoretypes/__init__.py", line 77, in get_score_type 
    parameters = json.loads(parameters) 
    File "/usr/lib/python2.7/json/__init__.py", line 339, in loads 
    return _default_decoder.decode(s) 
    File "/usr/lib/python2.7/json/decoder.py", line 364, in decode 
    obj, end = self.raw_decode(s, idx=_w(s, 0).end()) 
    File "/usr/lib/python2.7/json/decoder.py", line 382, in raw_decode 
    raise ValueError("No JSON object could be decoded") 
ValueError: No JSON object could be decoded 
2016/08/19 22:45:26 - ERROR [ContestWebServer,0] Uncaught exception (ValueError('No JSON object could be decoded',)) while processing a request: Traceback (most recent call last): 
    File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 1332, in _execute 
    result = method(*self.path_args, **self.path_kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 2601, in wrapper 
    return method(self, *args, **kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/server/__init__.py", line 195, in wrapped 
    return func(self, *args, **kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/server/ContestWebServer.py", line 1283, in get 
    score_type = get_score_type(dataset=task.active_dataset) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/grading/scoretypes/__init__.py", line 77, in get_score_type 
    parameters = json.loads(parameters) 
    File "/usr/lib/python2.7/json/__init__.py", line 339, in loads 
    return _default_decoder.decode(s) 
    File "/usr/lib/python2.7/json/decoder.py", line 364, in decode 
    obj, end = self.raw_decode(s, idx=_w(s, 0).end()) 
    File "/usr/lib/python2.7/json/decoder.py", line 382, in raw_decode 
    raise ValueError("No JSON object could be decoded") 
ValueError: No JSON object could be decoded 

2016/08/19 22:45:26 - ERROR [ContestWebServer,0] 500 GET /tasks/Hello/submissions/1 (127.0.0.1) 56.84ms 
127.0.0.1 - - [2016-08-19 22:45:26] "GET /tasks/Hello/submissions/1 HTTP/1.1" 500 4775 0.057471 
2016/08/19 22:45:26 - ERROR [ContestWebServer,0] Cannot decode score type parameters. 
ValueError('No JSON object could be decoded',). 
2016/08/19 22:45:26 - ERROR [ContestWebServer,0] Uncaught exception GET /tasks/Hello/submissions/2 (127.0.0.1) 
HTTPServerRequest(protocol='http', host='127.0.0.1:8888', method='GET', uri='/tasks/Hello/submissions/2', version='HTTP/1.1', remote_ip='127.0.0.1', headers={'Accept-Language': 'en-US,en;q=0.5', 'Accept-Encoding': 'gzip, deflate', 'Connection': 'keep-alive', 'Accept': '*/*', 'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:48.0) Gecko/20100101 Firefox/48.0', 'Host': '127.0.0.1:8888', 'X-Requested-With': 'XMLHttpRequest', 'Referer': 'http://127.0.0.1:8888/tasks/Hello/submissions', 'Cookie': 'unread_count="2|1:0|10:1471614324|12:unread_count|4:MA==|29d9493cc5372707a208c1eca6f791069159c152d0afaf5faeba8ed098391a04"; login="2|1:0|10:1471614324|5:login|68:KFZ5aHVucm9oCnAwClZxd2VydHl1aQpwMQpGMTQ3MTYxNDMyNC4yODA5NTgKdHAyCi4=|a2ea45df8688435985f9e1d5dacc23d4c37ae7ff7bf992ea0cb32e5e2f31f530"'}) 
Traceback (most recent call last): 
    File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 1332, in _execute 
    result = method(*self.path_args, **self.path_kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 2601, in wrapper 
    return method(self, *args, **kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/server/__init__.py", line 195, in wrapped 
    return func(self, *args, **kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/server/ContestWebServer.py", line 1283, in get 
    score_type = get_score_type(dataset=task.active_dataset) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/grading/scoretypes/__init__.py", line 77, in get_score_type 
    parameters = json.loads(parameters) 
    File "/usr/lib/python2.7/json/__init__.py", line 339, in loads 
    return _default_decoder.decode(s) 
    File "/usr/lib/python2.7/json/decoder.py", line 364, in decode 
    obj, end = self.raw_decode(s, idx=_w(s, 0).end()) 
    File "/usr/lib/python2.7/json/decoder.py", line 382, in raw_decode 
    raise ValueError("No JSON object could be decoded") 
ValueError: No JSON object could be decoded 
2016/08/19 22:45:26 - ERROR [ContestWebServer,0] Uncaught exception (ValueError('No JSON object could be decoded',)) while processing a request: Traceback (most recent call last): 
    File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 1332, in _execute 
    result = method(*self.path_args, **self.path_kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 2601, in wrapper 
    return method(self, *args, **kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/server/__init__.py", line 195, in wrapped 
    return func(self, *args, **kwargs) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/server/ContestWebServer.py", line 1283, in get 
    score_type = get_score_type(dataset=task.active_dataset) 
    File "/usr/local/lib/python2.7/dist-packages/cms-1.2.0-py2.7.egg/cms/grading/scoretypes/__init__.py", line 77, in get_score_type 
    parameters = json.loads(parameters) 
    File "/usr/lib/python2.7/json/__init__.py", line 339, in loads 
    return _default_decoder.decode(s) 
    File "/usr/lib/python2.7/json/decoder.py", line 364, in decode 
    obj, end = self.raw_decode(s, idx=_w(s, 0).end()) 
    File "/usr/lib/python2.7/json/decoder.py", line 382, in raw_decode 
    raise ValueError("No JSON object could be decoded") 
ValueError: No JSON object could be decoded 

2016/08/19 22:45:26 - ERROR [ContestWebServer,0] 500 GET /tasks/Hello/submissions/2 (127.0.0.1) 63.60ms 
127.0.0.1 - - [2016-08-19 22:45:26] "GET /tasks/Hello/submissions/2 HTTP/1.1" 500 4775 0.064078

当我尝试以用户身份查看我的提交内容时，会发生这种情况，并且分数不会显示出来。

这里的版本：

$ pip list 
backport-ipaddress (0.1) 
backports-abc (0.4) 
backports.ssl-match-hostname (3.5.0.1) 
certifi (2016.8.8) 
cms (1.2.0) 
coverage (4.2) 
Django (1.10) 
djrill (2.1.0) 
funcsigs (1.0.2) 
gevent (1.1.2) 
greenlet (0.4.10) 
mechanize (0.2.5) 
mock (2.0.0) 
netifaces (0.10.4) 
patool (1.12) 
pbr (1.10.0) 
pip (8.1.2) 
psutil (0.6.1) 
pyasn (1.5.0b7) 
pyasn1 (0.1.9) 
pycrypto (2.6.1) 
pytz (2014.10) 
PyYAML (3.10) 
requests (2.11.0) 
setuptools (25.2.0) 
singledispatch (3.4.0.3) 
six (1.10.0) 
SQLAlchemy (0.6.0) 
tornado (4.0) 
Werkzeug (0.11.10) 
wheel (0.29.0)

我用这个装（在文档）：

sudo apt-get install build-essential fpc postgresql postgresql-client \ 
gettext python2.7 python-setuptools python-tornado python-psycopg2 \ 
python-sqlalchemy python-psutil python-netifaces python-crypto \ 
python-tz python-six iso-codes shared-mime-info stl-manual \ 
python-beautifulsoup python-mechanize python-coverage python-mock \ 
cgroup-lite python-requests python-werkzeug python-gevent patool

如果你需要

，这里的要求：

setuptools>=0.6 
tornado>=2.0 
psycopg2>=2.4 
sqlalchemy>=0.7 
netifaces>=0.5 
pycrypto>=2.3 
pyyaml>=3.10 
pytz>=2011k 
psutil>=0.6 
BeautifulSoup>=3.2 
coverage>=3.4 
mock>=1.0 
mechanize>=0.2 
six>=1.1 
requests>=1.1 
gevent>=1.0 
werkzeug>=0.8 
pycups>=1.9 
PyPDF2>=1.19 
patool>=1.7

我已经降级龙卷风版本4.2.1至4.0，psutil从this至0.6.1。

如果您需要任何列表或如果我要求错误的东西，请通知我。谢谢！

来源

2016-08-19 Young Hoon Roh

对不起，这是我的错。对于谁有同样的错误，（可以预见没有人）我填写我的任务得分形式不当，所以JSON无法解码他们。闭幕！

来源

2016-08-28 15:05:22

CMS，龙卷风中的JSON ValueError

回答

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