首页 \ 问答 \ Google App Engine 500错误，但为什么？(Google App Engine 500 Error, but why?)

Google App Engine 500错误，但为什么？(Google App Engine 500 Error, but why?)

 我在部署App Engine后遇到以下错误。 有人知道原因吗？ 它有时会导致错误页面。 看起来simplejson是原因... 
 

 据http://code.google.com/status/appengine/ everyting应该相应地工作。 
 

  09-20 11:03AM 56.027 / 500 55902ms 240cpu_ms 0kb Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; nl-nl) AppleWebKit/533.18.1 (KHTML, like Gecko) Version/5.0.2 Safari/533.18.5,gzip(gfe)
 - - [20/Sep/2010:11:04:51 -0700] "GET / HTTP/1.1" 500 0 - "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; nl-nl) AppleWebKit/533.18.1 (KHTML, like Gecko) Version/5.0.2 Safari/533.18.5,gzip(gfe)" "" ms=55903 cpu_ms=240 api_cpu_ms=0 cpm_usd=0.006723 loading_request=1 pending_ms=1266
E 09-20 11:04AM 51.915
<class 'google.appengine.runtime.DeadlineExceededError'>: 
Traceback (most recent call last):
  File "/base/data/home/apps//7.344918194765199957/main.py", line 11, in <module>
    from logic import home, program, image, searchhandler, twitter, sitemap, feed
  File "/base/data/home/apps/7.344918194765199957/logic/home.py", line 14, in <module>
    from django.utils import simplejson
  File "/base/python_runtime/python_lib/versions/third_party/django-0.96/django/utils/simplejson/__init__.py", line 95, in <module>
    from django.utils.simplejson.decoder import JSONDecoder
  File "/base/python_runtime/python_lib/versions/third_party/django-0.96/django/utils/simplejson/decoder.py", line 6, in <module>
    from django.utils.simplejson.scanner import Scanner, pattern
  File "/base/python_runtime/python_lib/versions/third_party/django-0.96/django/utils/simplejson/scanner.py", line 3, in <module>
    """
I 09-20 11:04AM 51.924
This request caused a new process to be started for your application, and thus caused your application code to be loaded for the first time. This request may thus take longer and use more CPU than a typical request for your application.

 

 这是页面显示的错误： 
 

Error: Server Error
The server encountered an error and could not complete your request.

If the problem persists, please report your problem and mention this error message and the query that caused it.

 

 看来这不是导致500错误的唯一错误。 因为大部分时间这似乎是原因： 
 

09-20 11:37AM 18.229 /ohohcherso.html 500 11007ms 0cpu_ms 0kb Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.3 (KHTML, like Gecko) Chrome/6.0.472.62 Safari/534.3,gzip(gfe),gzip(gfe)
94.209.194.233 - sammiestoel [20/Sep/2010:11:37:29 -0700] "GET /ohohcherso.html HTTP/1.1" 500 0 "http://www.tweetstream.nl/index.html" "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.3 (KHTML, like Gecko) Chrome/6.0.472.62 Safari/534.3,gzip(gfe),gzip(gfe)" "www.tweetstream.nl" ms=11008 cpu_ms=0 api_cpu_ms=0 cpm_usd=0.000148
W 09-20 11:37AM 29.237
Request was aborted after waiting too long to attempt to service your request. This may happen sporadically when the App Engine serving cluster is under unexpectedly high or uneven load. If you see this message frequently, please contact the App Engine team.


I am getting the following error in App Engine after I deployed it. Does anybody know the reason? It's causing an error page sometimes. It seems simplejson is the cause...
 

According to http://code.google.com/status/appengine/ everyting should be working accordingly.
 

  09-20 11:03AM 56.027 / 500 55902ms 240cpu_ms 0kb Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; nl-nl) AppleWebKit/533.18.1 (KHTML, like Gecko) Version/5.0.2 Safari/533.18.5,gzip(gfe)
 - - [20/Sep/2010:11:04:51 -0700] "GET / HTTP/1.1" 500 0 - "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; nl-nl) AppleWebKit/533.18.1 (KHTML, like Gecko) Version/5.0.2 Safari/533.18.5,gzip(gfe)" "" ms=55903 cpu_ms=240 api_cpu_ms=0 cpm_usd=0.006723 loading_request=1 pending_ms=1266
E 09-20 11:04AM 51.915
<class 'google.appengine.runtime.DeadlineExceededError'>: 
Traceback (most recent call last):
  File "/base/data/home/apps//7.344918194765199957/main.py", line 11, in <module>
    from logic import home, program, image, searchhandler, twitter, sitemap, feed
  File "/base/data/home/apps/7.344918194765199957/logic/home.py", line 14, in <module>
    from django.utils import simplejson
  File "/base/python_runtime/python_lib/versions/third_party/django-0.96/django/utils/simplejson/__init__.py", line 95, in <module>
    from django.utils.simplejson.decoder import JSONDecoder
  File "/base/python_runtime/python_lib/versions/third_party/django-0.96/django/utils/simplejson/decoder.py", line 6, in <module>
    from django.utils.simplejson.scanner import Scanner, pattern
  File "/base/python_runtime/python_lib/versions/third_party/django-0.96/django/utils/simplejson/scanner.py", line 3, in <module>
    """
I 09-20 11:04AM 51.924
This request caused a new process to be started for your application, and thus caused your application code to be loaded for the first time. This request may thus take longer and use more CPU than a typical request for your application.

 

This is the error that the page will show: 
 

Error: Server Error
The server encountered an error and could not complete your request.

If the problem persists, please report your problem and mention this error message and the query that caused it.

 

It seems this is not the only error causing the 500 error. Because most of the time this seems to be the cause:
 

09-20 11:37AM 18.229 /ohohcherso.html 500 11007ms 0cpu_ms 0kb Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.3 (KHTML, like Gecko) Chrome/6.0.472.62 Safari/534.3,gzip(gfe),gzip(gfe)
94.209.194.233 - sammiestoel [20/Sep/2010:11:37:29 -0700] "GET /ohohcherso.html HTTP/1.1" 500 0 "http://www.tweetstream.nl/index.html" "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.3 (KHTML, like Gecko) Chrome/6.0.472.62 Safari/534.3,gzip(gfe),gzip(gfe)" "www.tweetstream.nl" ms=11008 cpu_ms=0 api_cpu_ms=0 cpm_usd=0.000148
W 09-20 11:37AM 29.237
Request was aborted after waiting too long to attempt to service your request. This may happen sporadically when the App Engine serving cluster is under unexpectedly high or uneven load. If you see this message frequently, please contact the App Engine team.


原文：https://stackoverflow.com/questions/3754243
更新时间：2022-11-14 16:11

最满意答案

 如果除以系列（通过选择第二个数据帧的那一行），则熊猫将在第一个数据帧的列上对齐该系列，并给出所需的结果： 
 

In [75]: df1 / df2.loc['q']
Out[75]:
     A   B         C  D
x  inf   2  1.000000  2
y  inf   6  2.333333  4
z  inf  10  3.666667  6

 

 如果您不知道/想要使用该行的名称，则可以使用squeeze将一列数据df1 / df2.squeeze()转换为一系列： df1 / df2.squeeze() （请参阅@EdChum的答案）。 

If you divide by a Series (by selecting that one row of the second dataframe), pandas will align this series on the columns of the first dataframe, giving the desired result:
 

In [75]: df1 / df2.loc['q']
Out[75]:
     A   B         C  D
x  inf   2  1.000000  2
y  inf   6  2.333333  4
z  inf  10  3.666667  6

 

If you don't know/want to use the name of that one row, you can use squeeze to convert the one-column dataframe to a series: df1 / df2.squeeze() (see answer of @EdChum).

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