Socket.getInputStream.read(…) throws SocketException on Android when server sends FIN packet
I'm trying to implement a client application for Android that connects to a server using Socket, exchanges some data, and then terminates the connection in a graceful way, as described in this article:
https://docs.oracle.com/javase/8/docs/technotes/guides/net/articles/connection_release.html
However, the behavior of the client socket during disconnection does not behave as expected.
We have established a connection between Android client and server.
Client finishes sending all data and calls
socket.shutdownOutput()(sendsFINto server).Server receives the last bytes and calls its
socket.shutdownOutput()(sendsFINto client).
Client reads the last bytes from the server and the last call to
socket.getInputStream().read(...)throws the following exception:
java.net.SocketException: recvfrom failed: ECONNRESET (Connection reset by peer)with cause:android.system.ErrnoException: recvfrom failed: ECONNRESET (Connection reset by peer)
I expect the last call to socket.getInputStream().read(...) should return -1, which is the behavior I get when I run the same code on OpenJDK 11 on Ubuntu.
Is there some setting of Socket which could fix the behavior on Android?
java
android sockets tcp edited Jan 18 at 23:40
Remy Lebeau
334k18254450
asked Jan 18 at 21:34
Martin ObrátilMartin Obrátil
4315
add a comment |
I'm trying to implement a client application for Android that connects to a server using Socket, exchanges some data, and then terminates the connection in a graceful way, as described in this article:
https://docs.oracle.com/javase/8/docs/technotes/guides/net/articles/connection_release.html
However, the behavior of the client socket during disconnection does not behave as expected.
We have established a connection between Android client and server.
Client finishes sending all data and calls
socket.shutdownOutput()(sendsFINto server).Server receives the last bytes and calls its
socket.shutdownOutput()(sendsFINto client).
Client reads the last bytes from the server and the last call to
socket.getInputStream().read(...)throws the following exception:
java.net.SocketException: recvfrom failed: ECONNRESET (Connection reset by peer)with cause:android.system.ErrnoException: recvfrom failed: ECONNRESET (Connection reset by peer)
I expect the last call to socket.getInputStream().read(...) should return -1, which is the behavior I get when I run the same code on OpenJDK 11 on Ubuntu.
Is there some setting of Socket which could fix the behavior on Android?
java
android sockets tcp edited Jan 18 at 23:40
Remy Lebeau
334k18254450
asked Jan 18 at 21:34
Martin ObrátilMartin Obrátil
4315
Are you sureFINis being sent by the server?FINshould not cause anECONNRESETerror. Is the client connecting to the server via LAN/WiFi or cellular?
– Remy Lebeau
Jan 18 at 23:42
@RemyLebeau I was trying it only in Android emulator, connecting to localhost machine (through 10.0.2.2 ip address). Maybe that is the cause? I tried Wireshark and it is clearly visible that it is FIN and no RST.
– Martin Obrátil
Jan 19 at 19:57
It looks like this is only happening on Android emulator running on my Ubuntu 18.04 installation. I tried it on Android emulator in Macos everything worked as expected - no exception was thrown.
– Martin Obrátil
2 days ago
add a comment |
I'm trying to implement a client application for Android that connects to a server using Socket, exchanges some data, and then terminates the connection in a graceful way, as described in this article:
https://docs.oracle.com/javase/8/docs/technotes/guides/net/articles/connection_release.html
However, the behavior of the client socket during disconnection does not behave as expected.
We have established a connection between Android client and server.
Client finishes sending all data and calls
socket.shutdownOutput()(sendsFINto server).Server receives the last bytes and calls its
socket.shutdownOutput()(sendsFINto client).
Client reads the last bytes from the server and the last call to
socket.getInputStream().read(...)throws the following exception:
java.net.SocketException: recvfrom failed: ECONNRESET (Connection reset by peer)with cause:android.system.ErrnoException: recvfrom failed: ECONNRESET (Connection reset by peer)
I expect the last call to socket.getInputStream().read(...) should return -1, which is the behavior I get when I run the same code on OpenJDK 11 on Ubuntu.
Is there some setting of Socket which could fix the behavior on Android?
java
android sockets tcp edited Jan 18 at 23:40
Remy Lebeau
334k18254450
asked Jan 18 at 21:34
Martin ObrátilMartin Obrátil
4315
I'm trying to implement a client application for Android that connects to a server using Socket, exchanges some data, and then terminates the connection in a graceful way, as described in this article:
https://docs.oracle.com/javase/8/docs/technotes/guides/net/articles/connection_release.html
However, the behavior of the client socket during disconnection does not behave as expected.
We have established a connection between Android client and server.
Client finishes sending all data and calls
socket.shutdownOutput()(sendsFINto server).Server receives the last bytes and calls its
socket.shutdownOutput()(sendsFINto client).
Client reads the last bytes from the server and the last call to
socket.getInputStream().read(...)throws the following exception:
java.net.SocketException: recvfrom failed: ECONNRESET (Connection reset by peer)with cause:android.system.ErrnoException: recvfrom failed: ECONNRESET (Connection reset by peer)
I expect the last call to socket.getInputStream().read(...) should return -1, which is the behavior I get when I run the same code on OpenJDK 11 on Ubuntu.
Is there some setting of Socket which could fix the behavior on Android?
java
android sockets tcp java
android sockets tcp edited Jan 18 at 23:40
Remy Lebeau
334k18254450
asked Jan 18 at 21:34
Martin ObrátilMartin Obrátil
4315
edited Jan 18 at 23:40
Remy Lebeau
334k18254450
asked Jan 18 at 21:34
Martin ObrátilMartin Obrátil
4315
edited Jan 18 at 23:40
Remy Lebeau
334k18254450
edited Jan 18 at 23:40
Remy Lebeau
334k18254450
edited Jan 18 at 23:40
Remy Lebeau
334k18254450
334k18254450
asked Jan 18 at 21:34
Martin ObrátilMartin Obrátil
4315
asked Jan 18 at 21:34
Martin ObrátilMartin Obrátil
4315
asked Jan 18 at 21:34
Martin ObrátilMartin Obrátil
4315
4315
Are you sureFINis being sent by the server?FINshould not cause anECONNRESETerror. Is the client connecting to the server via LAN/WiFi or cellular?
– Remy Lebeau
Jan 18 at 23:42
@RemyLebeau I was trying it only in Android emulator, connecting to localhost machine (through 10.0.2.2 ip address). Maybe that is the cause? I tried Wireshark and it is clearly visible that it is FIN and no RST.
– Martin Obrátil
Jan 19 at 19:57
It looks like this is only happening on Android emulator running on my Ubuntu 18.04 installation. I tried it on Android emulator in Macos everything worked as expected - no exception was thrown.
– Martin Obrátil
2 days ago
add a comment |
Are you sureFINis being sent by the server?FINshould not cause anECONNRESETerror. Is the client connecting to the server via LAN/WiFi or cellular?
– Remy Lebeau
Jan 18 at 23:42
@RemyLebeau I was trying it only in Android emulator, connecting to localhost machine (through 10.0.2.2 ip address). Maybe that is the cause? I tried Wireshark and it is clearly visible that it is FIN and no RST.
– Martin Obrátil
Jan 19 at 19:57
It looks like this is only happening on Android emulator running on my Ubuntu 18.04 installation. I tried it on Android emulator in Macos everything worked as expected - no exception was thrown.
– Martin Obrátil
2 days ago
Are you sure
FIN is being sent by the server? FIN should not cause an ECONNRESET error. Is the client connecting to the server via LAN/WiFi or cellular?– Remy Lebeau
Jan 18 at 23:42
Are you sure
FIN is being sent by the server? FIN should not cause an ECONNRESET error. Is the client connecting to the server via LAN/WiFi or cellular?– Remy Lebeau
Jan 18 at 23:42
@RemyLebeau I was trying it only in Android emulator, connecting to localhost machine (through 10.0.2.2 ip address). Maybe that is the cause? I tried Wireshark and it is clearly visible that it is FIN and no RST.
– Martin Obrátil
Jan 19 at 19:57
@RemyLebeau I was trying it only in Android emulator, connecting to localhost machine (through 10.0.2.2 ip address). Maybe that is the cause? I tried Wireshark and it is clearly visible that it is FIN and no RST.
– Martin Obrátil
Jan 19 at 19:57
It looks like this is only happening on Android emulator running on my Ubuntu 18.04 installation. I tried it on Android emulator in Macos everything worked as expected - no exception was thrown.
– Martin Obrátil
2 days ago
It looks like this is only happening on Android emulator running on my Ubuntu 18.04 installation. I tried it on Android emulator in Macos everything worked as expected - no exception was thrown.
– Martin Obrátil
2 days ago
add a comment |
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Are you sure
FINis being sent by the server?FINshould not cause anECONNRESETerror. Is the client connecting to the server via LAN/WiFi or cellular?– Remy Lebeau
Jan 18 at 23:42
@RemyLebeau I was trying it only in Android emulator, connecting to localhost machine (through 10.0.2.2 ip address). Maybe that is the cause? I tried Wireshark and it is clearly visible that it is FIN and no RST.
– Martin Obrátil
Jan 19 at 19:57
It looks like this is only happening on Android emulator running on my Ubuntu 18.04 installation. I tried it on Android emulator in Macos everything worked as expected - no exception was thrown.
– Martin Obrátil
2 days ago