Android HttpUrlConnection EOFException

Question

I would like to know if there are known issues on Android with HttpUrlConnection and POST requests. We are experiencing intermittent EOFExceptions when maki

Answer 1

Yes. There is a problem in the Android platform, specifically, in Android libcore with version 4.1-4.3.

The problem is introduced in this commit: https://android.googlesource.com/platform/libcore/+/b2b02ac6cd42a69463fd172531aa1f9b9bb887a8

Android 4.4 switched http lib to "okhttp" which doesn't have this problem.

Problem explained as follow:

On android 4.1-4.3, when you are using URLConnection/HttpURLConnection to POST with "ChunkedStreamingMode" or "FixedLengthStreamingMode" set, URLConnection/HttpURLConnection will not do silent retry if the reused connection is stale. You should retry POST at most "http.maxConnections+1" times in your code, just as previous answers suggest.