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lipoja / URLExtract

URLExtract is python class for collecting (extracting) URLs from given text based on locating TLD.
MIT License
239 stars 61 forks source link

dns_cache #63

Open jayvdb opened 4 years ago

jayvdb commented 4 years ago

I've created https://github.com/jayvdb/dns-cache which caches negative responses, which is quite helpful when using the recently added DNS checking in URLExtract.

Should I add dns_cache to dns_cache_install? Or just mention it in the README for users which want more control?

Also there is a fairly serious problem with the dnspython "socket" resolver on Windows during negative responses. https://github.com/rthalley/dnspython/issues/416

However the AttributeError caused there should be caught at https://github.com/lipoja/URLExtract/blob/1eb9ad5/urlextract/urlextract_core.py#L564 , so the logging there is the only bit which can be improved.

We can also improve the logging by catching socket.gaierror and giving it a better log entry.

lipoja commented 4 years ago

If there is possibility to let user chose then we can do it. On the other side if your solution supports caching of negative responses and current one does not. Then I would go with your dns_cache.

Could you improve the logging as you are suggesting, please? It might be helpful for users when they will be debugging the code.

jayvdb commented 4 years ago

Ok, I'll get a PR underway today.

jayvdb commented 4 years ago

https://github.com/lipoja/URLExtract/pull/65 is a first cut of showing that negative hits are cached.

jayvdb commented 4 years ago

btw, dns-cache was built for https://github.com/jayvdb/pypidb , where I am also using urlextract ; the test suite is processing a huge dataset, and exposes quite a lot of potential improvements with urlextract.

lipoja commented 4 years ago

Yeah, I've already check that. Interesting project. I am glad that this small library could be part of it :) Let's file new issues for all improvements.

jayvdb commented 4 years ago

I've started that with https://github.com/lipoja/URLExtract/issues/68 , but those are less about the DNS aspects. To see DNS issues, actually it would be helpful to add some optional mechanism for URLExtract to keep a list of rejected URLs/domains, so that I can then easily review those in my test suite, highlighting any which might be solvable earlier in URLExtract to reduce the DNS hits.

Currently the best way to do that is to cause a test class to fail all packages and review the logs. The test runner will stop after 50 failures - edit tox.ini to see more.

e.g. https://pypi.org/project/Genshi/

INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(genshi-0.7.zip) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(genshi-0.6.1.zip) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(genshi-0.6.zip) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(genshi-0.5.1.zip) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(genshi-0.5.zip) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(genshi-0.4.4.zip) gaierror(-2)

blurb:

DEBUG    pypidb._pypi:_pypi.py:313 processing Webpage: https://bugs.python.org/
INFO     urlextract:urlextract_core.py:518 Invalid host 'http://3.8.]'. If the host is valid report a bug.

kaitaistruct

INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(gif.java) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(gif.py) gaierror(-2)

libpysal

INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(libpysal.cg) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(libpysal.io) gaierror(-2)

pyxdg

DEBUG    pypidb._pypi:_pypi.py:313 processing Webpage: http://freedesktop.org/wiki/Software/pyxdg
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(menu.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(menu.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(inifile.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(desktopentry.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(mimetype.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(desktopentry.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(desktopentry.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(desktopentry.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(menu.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(mime.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(menu.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(menueditor.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(applications.menu) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(icontheme.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(menu.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(menueditor.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(menu.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(menueditor.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(config.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(menueditor.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(menu.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(inifile.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(desktopentry.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(basedirectory.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(icontheme.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(config.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(config.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(locale.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(mime.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(menu.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(recentfiles.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(menu.py) gaierror(-2)

This is extremely common when processing webpages. (mwlib.ext is where I am seeing it now)

INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(.google-analytics.com) gaierror(-11)

mwlib.ext

DEBUG    pypidb._pypi:_pypi.py:313 processing Webpage: http://www.mediawiki.org/wiki/Extension:Collection
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(ext.uls.pt) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(ext.gadget.site) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(p-mediawiki.org) gaierror(-2)
...
DEBUG    pypidb._pypi:_pypi.py:313 processing Webpage: http://blog.pediapress.com/
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(service.post) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(body.mobile) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(body.mobile) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(wikipediabooks.org) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(wikipediabooks.org) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(x22service.post) gaierror(-2)
...

py-trello

INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(mywebhookurl.com) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(subdomain.*.trello.com) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(subdomain.*.trello.com) gaierror(-2)

msgpack-python: See https://github.com/lipoja/URLExtract/issues/69#issuecomment-609386473

jayvdb commented 4 years ago

config: e.target is really common

DEBUG    pypidb._pypi:_pypi.py:313 processing Webpage: http://docs.red-dove.com/cfg/python.html
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(e.target) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(e.target) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(e.target) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(e.target) gaierror(-2)
...
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(settings.py) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(django.security) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(django.security) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(django.security) gaierror(-2)
...
DEBUG    pypidb._pypi:_pypi.py:313 processing Webpage: https://play.google.com/store/apps/details?id=com.google.android.apps.authenticator2&
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(a.call) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(p.click) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(co.id) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(co.id) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(this.ga) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(this.ga) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(this.ga) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(m.id) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(k.id) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(a.re) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(a.re) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(a.call) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(array.prototype.map) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(d.name) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(this.data) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(window.google&&window.google.sn) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(window.google.sn) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(a.tc) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(a.tc) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(c.next) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(g.next) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(d.next.next) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(c.ga) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(b.ga) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(b.ga) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(this.ga) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(this.bottom-this.top) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(this.top) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(this.top) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(this.top) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(this.top) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(this.top) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(this.top) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(a.right-a.left,a.bottom-a.top) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(g.target) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(this.ga) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(this.ga) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(gbar.mls) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(gbar.bv) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(gbar.kn) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(gbar.sb) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(cp.me) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(cp.ml) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(up.sl) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(c.top) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(c.top) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(a.bottom-a.top) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(a.o.id) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(d.target) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(d.id) gaierror(-2)
INFO     urlextract:urlextract_core.py:518 Invalid host 'http://.o.style.width=b.items[c]'. If the host is valid report a bug.
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(this.gb) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(a.qa) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(a.lb) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(person.photo) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(gbar.si) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(silk.s.sis.ca) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(com.google.android.apps.youtube.mango) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(com.google.android.apps.youtube.mango) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(com.google.android.apps.youtube.mango) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(com.google.android.apps.youtube.mango) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(com.teamviewer.quicksupport.market) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(com.teamviewer.quicksupport.market) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(com.teamviewer.quicksupport.market) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(com.teamviewer.quicksupport.market) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(u003dcom.google.android.apps.youtube.mango) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(com.google.android.apps.youtube.mango) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(u003dcom.google.android.play.games) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(com.google.android.play.games) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(u003dcom.teamviewer.quicksupport.market) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(com.teamviewer.quicksupport.market) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(u003dcom.google.android.apps.youtube.mango) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(com.google.android.apps.youtube.mango) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(u003dcom.google.android.play.games) gaierror(-2)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(com.google.android.play.games) gaierror(-2)

geoip

DEBUG    pypidb._pypi:_pypi.py:313 processing Webpage: https://support.maxmind.com/geoip-data-correction-request/
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
...
DEBUG    pypidb._pypi:_pypi.py:313 processing Webpage: https://support.maxmind.com/
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)
INFO     urlextract:urlextract_core.py:567 Unknown exception during gethostbyname(26vddl1ry78464rf7e94z1ee-wpengine.netdna-ssl.com) gaierror(-11)