Google app engine 为什么在分页第2页第2次点击时出现“InvalidRequest”？

我进行分页，一个指向第2页的链接如下所示

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但偶尔，我会收到一条错误消息，它似乎不是超时，而是查询错误。当我点击“重新加载”时，出现了这个错误，是超时错误吗

 "GET /q?query=regionID%3D4700188&cursor=False:CqoECuYBCtgB_wDAQM8HgAD_AP8A_wD__wDAQCQA_wD_AP8A_wD_AP__AMBAHAD_AP8A_wD_AP8A___-9wllzNf_Z_-_jIGSkJGLnpCPjZCVmpyL_wB0baCgmYuMoKD_AF2ej4-akZiWkZr_AHN0bZaRm5qH_wBdnpuM_wBzdG2bkJyglpv_AF2emMaFmZLOiZ2RrZedzL2Gnc2Pk6bMrYa8iIysvpS5lLi0nsrOiLKy_wBzf56YxoWZks6JnZGtl53MvYadzY-TpsythryIjKy-lLmUuLSeys6IsrL_AP_-EDIh4o_3av1KJSkSDURvY3VtZW50SW5kZXganwEoQU5EIChJUyAiY3VzdG9tZXJfbmFtZSIgImFwcGVuZ2luZSIpIChJUyAiZ3JvdXBfbmFtZSIgInN-bW9udGFvcHJvamVjdCIpIChJUyAibmFtZXNwYWNlIiAiIikgKElTICJpbmRleF9uYW1lIiAiYWRzIikgKEVRIDQ3MDAxODguMDAwMDAwMDAwMDAgInNuYnJfcmVnaW9uSUQiKSk6GwoOKE4gc2RhdGVfZGF0ZSkQARkAAABzFPtzQjoaCg0oTiBzbmJyX2hvdXIpEAEZAAAAAAAAEEA6HAoPKE4gc25icl9taW51dGUpEAEZAAAAAAAAMkBKHAgBOhVzdDpidGlfZ2VuZXJpY19zY29yZXJAkE5SGQoMKE4gb3JkZXJfaWQpEAEZAAAAAAAA8P8 HTTP/1.1" 200 8611 "http://www.koolbusiness.com/q?query=regionID%3D4700188" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.71 Safari/537.36" "www.koolbusiness.com" ms=133 cpu_ms=42 cpm_usd=0.060962 app_engine_release=1.8.1 instance=00c61b117cd1983617eb4b0968a84b71874563
D 2013-07-06 06:20:37.095
query regionID=4700188
E 2013-07-06 06:20:37.120
Search failed
Traceback (most recent call last):
  File "/base/data/home/apps/s~montaoproject/2013e.368581150756737282/search_demo.py", line 87, in find_documents
    return index.search(query)
  File "/python27_runtime/python27_lib/versions/1/google/appengine/api/search/search.py", line 2732, in search
    _CheckStatus(response.status())
  File "/python27_runtime/python27_lib/versions/1/google/appengine/api/search/search.py", line 413, in _CheckStatus
    raise _ERROR_MAP[status.code()](status.error_detail())
InvalidRequest: Failed to execute search request "regionID=4700188"

代码

---

它确实是随机发生的，似乎没有超时，并且异常没有通知问题，它所说的是搜索失败和失败的查询，如果我把它放在搜索字段中，查询就会工作。所以无论如何这都没有意义

我只能猜测是区域研究失败了。 您需要处理查询中的异常。 看

异常将告诉您错误是什么。很难猜测

编辑：

---

我只能猜测是区域研究失败了。 您需要处理查询中的异常。 看

异常将告诉您错误是什么。很难猜测

编辑：

尝试将SortExpression的默认值设置为None，这对我很有用

我在测试/质量保证实例中遇到了同样的问题，但是在我的产品实例中效果很好，将默认值设置为“无”很好地解决了测试/质量保证实例中的问题。

尝试将SortExpression的默认值设置为“无”，这对我来说很有效

---

我在我的测试/质量保证实例中遇到了同样的问题，但是在我的产品实例中效果很好，将默认值设置为“无”很好地解决了测试/质量保证实例中的问题。

失败的不仅仅是区域搜索，它还在第2页之后的页面上搜索空字符串。由于它从未在第一页出现过，我怀疑这一定与游标有关，但我一直无法找出游标的错误。例外情况没有告诉我任何事情，它只是说‘这不起作用’，也没有说明原因。我更改了处理，但它没有生成更多关于以下错误的输出：return index.searchquery，search除外。错误为e:logging.exception'search failed%s'，e您得到的异常类型是什么？对于初学者，尝试捕捉各种类型的搜索异常，看看它是什么：您需要创建一个简单的示例来说明问题。这里有太多的代码，任何人都无法通过，这意味着没有人可以尝试和复制您正在做的事情。你得到的错误来自谷歌的基础设施，因此你没有太多的工作要处理。它是可复制的还是随机的？如果它是随机的，那么它可能只是底层的google fabric出了问题。您可以重试InvalidRequest错误。顺便说一句，10k是一个非常大的限制，你有可能会超时。失败的不仅仅是区域搜索，还有在第2页之后的页面上搜索空字符串。由于它从未在第一页出现过，我怀疑这一定与游标有关，但我一直无法找出游标的错误。例外情况没有告诉我任何事情，它只是说‘这不起作用’，也没有说明原因。我更改了处理，但它没有生成更多关于以下错误的输出：return index.searchquery，search除外。错误为e:logging.exception'search failed%s'，e您得到的异常类型是什么？对于初学者，尝试捕捉各种类型的搜索异常，看看它是什么：您需要创建一个简单的示例来说明问题。这里有太多的代码，任何人都无法通过，这意味着没有人可以尝试和复制您正在做的事情。你得到的错误来自谷歌的基础设施，因此你没有太多的工作要处理。它是可复制的还是随机的？如果它是随机的，那么它可能只是底层的google fabric出了问题。您可以重试InvalidRequest错误。顺便说一句，10k是一个非常大的限制，你有可能在那里超时。我有一个非常类似的问题，只出现在第2页和我排序时。。许多其他人似乎也有类似的问题。现在我改变了策略，使用多个索引和自定义排名，这样排序就可以很好地进行分页。。但我还是很聪明

---

如果答案是否定的，那么答案就是否定的exists@Programmer400-终于有结果了吗？对于分页，我现在面临着类似的问题。@Programmer400-非常感谢it@minocha我认为我的错误是日期的默认值必须是历史值。所以我把它定在1999年。然后它就起作用了。也许这也是另一个问题。该代码现在对我有效，如果它能帮助www.github.com/montaoI解决类似问题，欢迎您在github上查看它，仅在第2页和我排序时显示。。许多其他人似乎也有类似的问题。现在我改变了策略，使用多个索引和自定义排名，这样排序就可以很好地进行分页。。但我仍然对解决方案感兴趣，如果它exists@Programmer400-终于有结果了吗？对于分页，我现在面临着类似的问题。@Programmer400-非常感谢it@minocha我认为我的错误是日期的默认值必须是历史值。所以我把它定在1999年。然后它就起作用了。也许这也是另一个问题。代码现在适用于我，如果可以帮助www.github.com/montao，欢迎您在github上查看

def find_documents(query_string, limit, cursor):
    try:
        date_desc = search.SortExpression(expression='date',
                direction=search.SortExpression.DESCENDING,
                default_value=datetime.now().date())

        hr_desc = search.SortExpression(expression='hour',
                direction=search.SortExpression.DESCENDING,
                default_value=datetime.now().hour)

        min_desc = search.SortExpression(expression='minute',
                direction=search.SortExpression.DESCENDING,
                default_value=datetime.now().minute)

        # Sort up to 5000 matching results by subject in descending order

        sort = search.SortOptions(expressions=[date_desc, hr_desc,
                                  min_desc], limit=10000)

        # Set query options

        options = search.QueryOptions(limit=limit, cursor=cursor,
                sort_options=sort, number_found_accuracy=10000)  # the number of results to return

            # returned_fields=['author', 'subject', 'summary'],
            # snippeted_fields=['content']

        query = search.Query(query_string=query_string, options=options)
        index = search.Index(name=_INDEX_NAME)

        # Execute the query

        return index.search(query)
    except search.Error:
        logging.exception('Search failed')
    return None




regions_in = [
        ('3', u'Entire India'),
    ('4703187', u'Andaman & Nicobar Islands'),
    ('4694186', u'Andhra Pradesh'),
    ('4699188', u'Arunachal Pradesh'),
    ('4692186', u'Assam'),
    ('4702186', u'Bihar'),
    ('4698185', u'Chandigarh'),
    ('4676188', u'Chhattisgarh'),
    ('4691190', u'Dadra & Nagar Haveli'),
    ('4704183', u'Daman & Diu'),
    ('4699183', u'Delhi'),
    ('4702187', u'Goa'),
    ('4691189', u'Gujarat'),
    ('4700186', u'Haryana'),
    ('4703185', u'Himachal Pradesh'),
    ('4694187', u'Jammu & Kashmir'),
    ('4699189', u'Jharkhand'),
    ('4701185', u'Karnataka'),
    ('4695189', u'Kerala'),
    ('4700189', u'Lakshadweep'),
    ('4697186', u'Madhya Pradesh'),
    ('4694184', u'Maharashtra'),
    ('4700187', u'Manipur'),
    ('4703186', u'Meghalaya'),
    ('4698184', u'Mizoram'),
    ('4692187', u'Nagaland'),
    ('4696185', u'Orissa'),
    ('4676189', u'Pondicherry'),
    ('4693185', u'Punjab'),
    ('4701186', u'Rajasthan'),
    ('4701187', u'Sikkim'),
    ('4701188', u'Tamil Nadu'),
    ('4697187', u'Tripura'),
    ('4699190', u'Uttaranchal'),
    ('4692188', u'Uttar Pradesh'),
    ('4700188', u'West Bengal'),
    ]

class RegionSearch(SearchBaseHandler):

    """Handles regional search requests."""

    def get(self):
        """Handles a get request with a query."""

        category = None
        cityentity = None
        next_cursor = None
        country = ''
        if self.request.host.find('hipheap') > -1: country = 'USA'
        elif self.request.host.find('koolbusiness') > -1: country = 'India'
        elif self.request.host.find('montao') > -1: country = 'Brasil'
        number_returned = 0
        regionname = None
        cityname = None
        regionentity = None
        region = None
        cursor = self.request.get('cursor')
        uri = urlparse(self.request.uri)
        query = ''
        regionID = regionid = self.request.get('regionid', 0)
        cityID = cityid = self.request.get('cityid', 0)
        categoryID = categoryid = self.request.get('category', 0)
        if uri.query:
            query = parse_qs(uri.query)
            try:
                query = query['query'][0]
            except KeyError, err:
                query = ''
                # logging.info('KeyError')

        # Try find region ID and/or cityID and categoryID a.s.a.p.

        if regionid or query.find('regionID') > -1:
            regionID = re.sub("^regionID=(\d+).*", r'\1', query)
            region = Region.get_by_id(long(regionID))
            regionname = region.name

        if regionid:
            regionID = regionid
            region = Region.get_by_id(long(regionID))
            regionname = region.name

        if cityid or query.find('cityID') > -1:
            cityID = re.sub("^.*cityID=(\d+).*", r'\1', query)
            if cityid: cityID = cityid
            city = montaomodel.City.get_by_id(long(cityID))
            cityID = city.key().id()
            cityentity = city
            cityname = city.name
            region = Region.get_by_id(long(city.region.key().id()))
            regionID = region.key().id()

        if categoryid or query.find('category') > -1:
            categoryID = re.sub("^.*category=(\d+).*", r'\1', query)
            if categoryid: categoryID = categoryid

        logging.debug('query %s', query)

        if cursor: results = find_documents(query, 50, search.Cursor(cursor))
        else: results = find_documents(query, 50, search.Cursor())

        if results and results.cursor: next_cursor = results.cursor.web_safe_string
        namedquery = query
        query = query.replace(' and company_ad=0', ''
                              ).replace(' and company_ad=1', ''
                ).replace(' and category:(6010 OR 6020 OR 6030 OR 6040 OR 6090)'
                          , ''
                          ).replace(' and category:(6010 OR 6020 OR 6030 OR 6040 OR 6090)'
                                    , ''
                                    ).replace(' and category:(1020 OR 1010 OR 1030 OR 1050 OR 1080 OR 1100 OR 1090)'
                , ''
                ).replace(' and category:(2010 OR 2030 OR 2040 OR 2080 OR 2070)'
                          , ''
                          ).replace(' and category:(3040 OR 3050 OR 3030 OR 3060)'
                                    , ''
                                    ).replace(' and category:(4010 OR 4020 OR 4040 OR 4030 OR 4090 OR 4060 OR 4070)'
                , '')

        query = re.sub("regionID=\d+", '', query)
        query = query.replace('category and', '')
        query = query.replace('type=s', '')
        query = query.replace('type=w', '')
        query = query.replace('type=r', '')
        query = query.replace('type=b', '')
        query = query.replace('cityID and', '')
        query = query.replace('and ', '')
        query = query.replace(' and', '')
        query = query.replace('regionID', '')
        query = query.replace('=', '%3D')

        namedquery = namedquery.replace('=', '%3D')

        query = re.sub("cityID%3D\d+", '', query)
        query = re.sub("category%3D\d+", '', query)
        query = query.replace('  ', ' ')

        # to do: make into a dictionary for O(1) access


        if int(regionid) > 0: regionname = region_id_to_name[regionid]

        #if regionID and query.find('cityID') < 1:
        #    region = Region.get_by_id(long(regionID))

        form = SearchForm()

        form.w.choices = [
            ('4703187', u'Andaman & Nicobar Islands'),
            ('4694186', u'Andhra Pradesh'),
            ('4699188', u'Arunachal Pradesh'),
            ('4692186', u'Assam'),
            ('4702186', u'Bihar'),
            ('4698185', u'Chandigarh'),
            ('4676188', u'Chhattisgarh'),
            ('4691190', u'Dadra & Nagar Haveli'),
            ('4704183', u'Daman & Diu'),
            ('4699183', u'Delhi'),
            ('4702187', u'Goa'),
            ('4691189', u'Gujarat'),
            ('4700186', u'Haryana'),
            ('4703185', u'Himachal Pradesh'),
            ('4694187', u'Jammu & Kashmir'),
            ('4699189', u'Jharkhand'),
            ('4701185', u'Karnataka'),
            ('4695189', u'Kerala'),
            ('4700189', u'Lakshadweep'),
            ('4697186', u'Madhya Pradesh'),
            ('4694184', u'Maharashtra'),
            ('4700187', u'Manipur'),
            ('4703186', u'Meghalaya'),
            ('4698184', u'Mizoram'),
            ('4692187', u'Nagaland'),
            ('4696185', u'Orissa'),
            ('4676189', u'Pondicherry'),
            ('4693185', u'Punjab'),
            ('4701186', u'Rajasthan'),
            ('4701187', u'Sikkim'),
            ('4701188', u'Tamil Nadu'),
            ('4697187', u'Tripura'),
            ('4699190', u'Uttaranchal'),
            ('4692188', u'Uttar Pradesh'),
            ('4700188', u'West Bengal'),
            ]

        if region or cityentity:

            # to do:use memcache

            form.area.choices = []  # to do: use memcache for the list
            for cityitem in City.all().filter('region =',
                    region.key()).order('-vieworder').order('name'
                    ).fetch(99999):
                form.area.choices.append([str(cityitem.key().id()),
                        cityitem.name])
            if cityentity:
                form.area.data = str(cityentity.key().id())

            if self.request.host.find('hipheap') > -1:
                if region and (str(region.key().id()), region.name) \
                    in form.w_us.choices:
                    form.w_us.choices.remove((str(region.key().id()),
                            region.name))
            else:
                if region and (str(region.key().id()), region.name) \
                    in form.w.choices:
                    form.w.choices.remove((str(region.key().id()),
                            region.name))
        if region: regionname = region.name
        if results: number_returned = len(results.results)
        template_values = {
            'results': results,'regionname':regionname,
            'cursor': next_cursor,
            'country': country,
            'user': self.current_user,
            'number_returned': number_returned,
            'loggedin': self.logged_in,
            'VERSION': VERSION,
            'region': region,
            'regionname': regionname,
            'jobs_count': get_jobs_count(self, regionID, cityID),
            'estate_count': get_estate_count(self, regionID, cityID),
            'electronics_count': get_electronics_count(self, regionID,
                    cityID),
            'home_count': get_home_count(self, regionID, cityID),
            'leisure_count': get_leisure_count(self, regionID, cityID),
            'vehicles_count': get_vehicles_count(self, regionID,
                    cityID),
            'cityentity': cityentity,
            'request': self.request,
            'categoryID': categoryID,
            'form': form,
            'query': query,
            'namedquery': namedquery,
            'cityname': cityname,
            'category': category,
            }
        self.render_template('q.htm', template_values)


class India(SearchBaseHandler):

    def get(self):
        """Handles a get request with a query."""
        regionname = None
        country = 'India'
        cursor = self.request.get('cursor')
        region = None
        if self.request.host.find('hipheap') > -1: country = 'USA'
        elif self.request.host.find('koolbusiness') > -1: country = 'India'
        elif self.request.host.find('montao') > -1: country = 'Brasil'
        uri = urlparse(self.request.uri)
        query = ''
        if uri.query:
            query = parse_qs(uri.query)
            try:
                query = query['query'][0]
            except KeyError, err:
                query = ''
                # logging.info('KeyError')
        if cursor:
            results = find_documents(query, 50, search.Cursor(cursor))
        else:
            results = find_documents(query, 50, search.Cursor())
        next_cursor = None
        if results and results.cursor: next_cursor = results.cursor.web_safe_string
        query = query.replace(' and company_ad=0', ''
                              ).replace(' and company_ad=1', '')
        regionname = 'Entire India'
        regionID = 0
        cityID = 0
        form = SearchForm()
        form.w.choices = region_id_to_name
        template_values = {
            'regions':region_id_to_name,
            'form': form,
            'results': results,
            'cursor': next_cursor,
            'region': region,
            'country': country,
            'number_returned': len(results.results),
            'jobs_count': get_jobs_count_india(self, regionID, cityID),
            'estate_count': get_estate_count_india(self, regionID,
                    cityID),
            'electronics_count': get_electronics_count_india(self,
                    regionID, cityID),
            'home_count': get_home_count_india(self, regionID, cityID),
            'leisure_count': get_leisure_count_india(self, regionID,
                    cityID),
            'vehicles_count': get_vehicles_count_india(self, regionID,
                    cityID),
            'user': users.get_current_user(),
            'loggedin': self.logged_in,
            'region': region,
            'regionname': regionname,
            'city': '',
            'cityentity': None,
            'request': self.request,
            'form': SearchForm(),
            'query': query,
            }
        self.render_template('q.htm', template_values)

index.search(query)
    except search.Error as e:
        logging.exception('Search failed %s', e)`

try:
    # do query

except search.PutError as e:
    logging.exception('caught PutError %s', e)

except search.InternalError as e:
    logging.exception('caught InternalError %s', e)

except search.DeleteError as e:
    logging.exception('caught DeleteError %s', e)

except search.TransientError as e:
    logging.exception('caught TransientError %s', e)

except search.InvalidRequest as e:
    logging.exception('caught InvalidError %s', e)

except search.Error as e:
    logging.exception('caught unknown error  %s', e)