Search failed
Traceback (most recent call last):
  File "/base/data/home/apps/s~montaoproject/2013e.368508855356793432/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 ""

Código

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

class USA(SearchBaseHandler):

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

        regionname = 'New York'
        region = Region.all().filter('name = ', regionname).get()

        cursor = self.request.get('cursor')

        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')

        # logging.info('search cursor: %s', search.Cursor())

        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', '')

        # logging.info('next cursor: %s', str(next_cursor))

        template_values = {
            'results': results,
            'cursor': next_cursor,
            'number_returned': len(results.results),
            '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)

Atualizar

Um link da página 2 que funcionou é assim

q?query=regionID%3D4702187&cursor=False:CqoECuYBCtgB_wDAQM7xgAD_AP8A_wD__wDAQCQA_wD_AP8A_wD_AP__AMBAPwD_AP8A_wD_AP8A___-9wlMHAj_jv9jjIGSkJGLnpCPjZCVmpyL_wB0baCgmYuMoKD_AF2ej4-akZiWkZr_AHN0bZaRm5qH_wBdnpuM_wBzdG2bkJyglpv_AF2emMaFmZLOiZ2RrZedzL2Gnc2Pk6bMrYa8iIysvpS5lLi1vMaRiLKy_wBzf56YxoWZks6JnZGtl53MvYadzY-TpsythryIjKy-lLmUuLW8xpGIsrL_AP_-EDIh4o_3av1KJSkSDURvY3VtZW50SW5kZXganwEoQU5EIChJUyAiY3VzdG9tZXJfbmFtZSIgImFwcGVuZ2luZSIpIChJUyAiZ3JvdXBfbmFtZSIgInN-bW9udGFvcHJvamVjdCIpIChJUyAibmFtZXNwYWNlIiAiIikgKElTICJpbmRleF9uYW1lIiAiYWRzIikgKEVRIDQ3MDIxODcuMDAwMDAwMDAwMDAgInNuYnJfcmVnaW9uSUQiKSk6GwoOKE4gc2RhdGVfZGF0ZSkQARkAAEANwvpzQjoaCg0oTiBzbmJyX2hvdXIpEAEZAAAAAAAAKEA6HAoPKE4gc25icl9taW51dGUpEAEZAAAAAACASUBKHAgBOhVzdDpidGlfZ2VuZXJpY19zY29yZXJAkE5SGQoMKE4gb3JkZXJfaWQpEAEZAAAAAAAA8P8

Vou tentar ver se posso fazer isso falhar aleatoriamente, então saberemos que é um erro de tempo limite. E se for um erro de tempo limite, posso armazená-lo em cache com o memcache e fazer algumas chamadas menos caras para evitar roundtrips e ele funcionará (?)

Estou fazendo isso tanto para consultas em branco quanto para pesquisa baseada em reiog, onde limito a pesquisa a uma região como acima e o regionID é um campo do documento indexado. Você pode conferir o [site ao vivo] [1] para dar uma olhada na ação.

Atualização 2

Um link da página 2 que funcionou é assim

/q?query=&cursor=False:CocECuYBCtgB_wDAQM8JAP8A_wD_AP8A__8AwEAkAP8A_wD_AP8A_wD__wDAQECAAP8A_wD_AP8A___-9wltwdL_Iv_jjIGSkJGLnpCPjZCVmpyL_wB0baCgmYuMoKD_AF2ej4-akZiWkZr_AHN0bZaRm5qH_wBdnpuM_wBzdG2bkJyglpv_AF2emMaFmZLOiZ2RrZedzL2Gnc2Pk6bMrYa8iIysvpS5lLi2vJXLrrKy_wBzf56YxoWZks6JnZGtl53MvYadzY-TpsythryIjKy-lLmUuLa8lcuusrL_AP_-EDIh4o_3av1KJSkSDURvY3VtZW50SW5kZXgafShBTkQgKElTICJjdXN0b21lcl9uYW1lIiAiYXBwZW5naW5lIikgKElTICJncm91cF9uYW1lIiAic35tb250YW9wcm9qZWN0IikgKElTICJuYW1lc3BhY2UiICIiKSAoSVMgImluZGV4X25hbWUiICJhZHMiKSAoVFJVRSkpOhsKDihOIHNkYXRlX2RhdGUpEAEZAABADcL6c0I6GgoNKE4gc25icl9ob3VyKRABGQAAAAAAACxAOhwKDyhOIHNuYnJfbWludXRlKRABGQAAAAAAgElAShwIAToVc3Q6YnRpX2dlbmVyaWNfc2NvcmVyQJBOUhkKDChOIG9yZGVyX2lkKRABGQAAAAAAAPD_

Se eu pressionar recarregar, pode funcionar ou falhar, então parece um erro aleatório. Alguma ideia?