UrlFetch requests failing with UnknownHostException

Béla Uzonyi

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Jul 19, 2017, 1:26:13 PM7/19/17

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Hi,

I am experiencing an issue with my app: all UrlFetch requests have been failing with java.net.UnknownHostException for about a day now. Anybody else having the same issue?

My app runs on AppEngine Standard with Java8 enabled, although the same issue happened some month ago on Java7. That time the issue went away after a couple of hours.

Best regards,

Bela

Kenworth (Google Cloud Platform)

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Jul 19, 2017, 5:27:13 PM7/19/17

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Please provide more information to further investigate your issue.

1- What was the most recent change you did on the app?

2- Are you issuing the command using "gcloud" or is it from the Console UI?

3- Please send sanitized output logs and any relevant information.

Béla Uzonyi

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Jul 20, 2017, 9:27:15 AM7/20/17

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No changes were made recently to my app.

Maybe I provided a misleading explanation. So my app's backend is trying to make requests to some public websites on the internet, and these are failing for all hosts.

I hope this clarifies things, thank you for your feedback.

Example stacktrace:
java.net.UnknownHostException: www.infoq.com
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at java.net.Socket.connect(Socket.java:538)
at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:211)
at sun.net.www.http.HttpClient.New(HttpClient.java:308)
at sun.net.www.http.HttpClient.New(HttpClient.java:326)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1202)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1138)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1032)
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:966)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1546)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474)

Antonio Antonelli

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Jul 20, 2017, 6:52:25 PM7/20/17

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I'm experiencing the same issue. It works on the dev server but not on the real one.

Kenworth (Google Cloud Platform)

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Jul 20, 2017, 7:08:38 PM7/20/17

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It seems that you are experiencing a network issue that doesn’t let you to establish a connection to the remote host. I found a similar issue on this StackOverflow post that might be helpful. In case your issue still persists I would recommend posting the question on StackOverflow or file a defect report on Public Issue Tracker. Please visit our community support page for list of StackOverflow tags [1].

[1] https://cloud.google.com/support/docs/stackexchange

Béla Uzonyi

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Jul 21, 2017, 6:40:34 AM7/21/17

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I have created an issue: https://issuetracker.google.com/issues/63916008

Thank you.

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