服务器安装的是6.1.3Pro版，在Ubuntu上用一键脚本安装的，问题表现在搜索的时候不定期会提示页面不可用，提示如下：
Page unavailable
Sorry, but the requested page is unavailable due to a server hiccup.
Our engineers have been notified, so check back later.
过一会重新搜索又恢复了。
以下是错误前后的seahub.log
@daniel.pan
2017-07-11 01:53:07,924 [ERROR] seahub.thumbnail.utils:131 generate_thumbnail cannot identify image file <StringIO.StringIO instance at 0x7f0d9ad1d1b8>
2017-07-11 01:53:07,969 [ERROR] seahub.thumbnail.utils:131 generate_thumbnail cannot identify image file <StringIO.StringIO instance at 0x7f0d977e1998>
2017-07-11 08:06:59,045 [INFO] elasticsearch:66 log_request_success HEAD http://127.0.0.1:9200/repofiles [status:200 request:0.004s]
2017-07-11 08:07:09,059 [WARNING] elasticsearch:88 log_request_fail GET http://127.0.0.1:9200/repofiles/_search [status:N/A request:10.012s]
Traceback (most recent call last):
File “/opt/seafile/seafile-pro-server-6.1.3/pro/python/elasticsearch-2.4.1-py2.6.egg/elasticsearch/connection/http_urllib3.py”, line 95, in perform_request
response = self.pool.urlopen(method, url, body, retries=False, headers=self.headers, **kw)
File “/opt/seafile/seafile-pro-server-6.1.3/pro/python/urllib3-1.21.1-py2.6.egg/urllib3/connectionpool.py”, line 649, in urlopen
_stacktrace=sys.exc_info()[2])
File “/opt/seafile/seafile-pro-server-6.1.3/pro/python/urllib3-1.21.1-py2.6.egg/urllib3/util/retry.py”, line 333, in increment
raise six.reraise(type(error), error, _stacktrace)
File “/opt/seafile/seafile-pro-server-6.1.3/pro/python/urllib3-1.21.1-py2.6.egg/urllib3/connectionpool.py”, line 600, in urlopen
chunked=chunked)
File “/opt/seafile/seafile-pro-server-6.1.3/pro/python/urllib3-1.21.1-py2.6.egg/urllib3/connectionpool.py”, line 388, in _make_request
self._raise_timeout(err=e, url=url, timeout_value=read_timeout)
File “/opt/seafile/seafile-pro-server-6.1.3/pro/python/urllib3-1.21.1-py2.6.egg/urllib3/connectionpool.py”, line 308, in _raise_timeout
raise ReadTimeoutError(self, url, “Read timed out. (read timeout=%s)” % timeout_value)
ReadTimeoutError: HTTPConnectionPool(host=u’127.0.0.1’, port=9200): Read timed out. (read timeout=10)