NullPointerException for SSL Connection on Android

[tobiasrohloff]

Hi,

I'm using the WebSocketClient in an Android app and I receive the following NullPointerException from some users:

java.lang.NullPointerException: ssl == null
	at com.android.org.conscrypt.NativeCrypto.SSL_read_BIO(Native Method)
	at com.android.org.conscrypt.OpenSSLEngineImpl.unwrap(OpenSSLEngineImpl.java:477)
	at javax.net.ssl.SSLEngine.unwrap(SSLEngine.java:1014)
	at org.java_websocket.SSLSocketChannel2.unwrap(SSLSocketChannel2.java:150)
	at org.java_websocket.SSLSocketChannel2.processHandshake(SSLSocketChannel2.java:123)
	at org.java_websocket.SSLSocketChannel2.write(SSLSocketChannel2.java:192)
	at org.java_websocket.SocketChannelIOHelper.writeBlocking(SocketChannelIOHelper.java:76)
	at org.java_websocket.client.WebSocketClient$WebsocketWriteThread.run(WebSocketClient.java:440)
	at java.lang.Thread.run(Thread.java:818)

The exception was thrown on different devices and different versions of Android. I use the following configuration to initiate the secured WebSocket connection:

webSocketClient = new WebSocketClient(uri, new Draft_10(), headers, 0) {
    ...
}

try {
    SSLContext sc = SSLContext.getInstance("TLS");
    sc.init(null, null, null);
    webSocketClient.setWebSocketFactory(new DefaultSSLWebSocketClientFactory(sc));
    webSocketClient.connect();
} catch (Exception e) {
    ...
}

I couldn't reproduce the issue on my debug devices. Any idea how I can avoid this or why it crashes sometimes? Can I catch the exception somehow? Looks like it is deeply nested in the library or Android itself.

Thanks

[erobic]

We are having this exact same issue!

[yasserf]

Same, any idea on why this happens?

[marci4]

Hello @yasserf,

could you provide me with a test application where I can try to fix this problem.

Greetings
marci4

[marci4]

possible cause #424

[marci4]

@erobic @rhlff could you provide me a test application?

[tobiasrohloff]

Unfortunately, I couldn't reproduce the issue on any of my debug devices or the emulator yet. I got the error logs from the Google Play Console.

[marci4]

Hello @rhlff,

I changed some code with #488.

Hope to resolve those issues with these changes!

Greetings
marci4

[tobiasrohloff]

Hi @marci4,

I already updated our app to version 1.3.3 and I will monitor if the issue will appear again. Hope for the best :)

[arpitjoshi08]

i am using socket 0.9 connection and for that i am using https://github.com/Gottox/socket.io-java-client with javewebsocket 1.3.3 jar and getting issue is some devices ;

Fatal Exception: java.lang.NullPointerExceptionssl == null Raw Text

  | com.android.org.conscrypt.NativeCrypto.SSL_write_BIO (NativeCrypto.java)
  | javax.net.ssl.SSLEngine.wrap (SSLEngine.java:1093)
  | org.java_websocket.SSLSocketChannel2.wrap (SSLSocketChannel2.java:141)
  | org.java_websocket.SSLSocketChannel2.write (SSLSocketChannel2.java:195)
  | org.java_websocket.SocketChannelIOHelper.writeBlocking (SocketChannelIOHelper.java:76)
  | org.java_websocket.client.WebSocketClient$WebsocketWriteThread.run (WebSocketClient.java:440)

i am not getting the reason why is it happening , can anyone help for that to resolved this?
and using 1.3.4 getting other issue like many time disconnect connection of node.
getting this issue;

07-29 02:43:50.077 7325-8261/com.sockettollnate W/System.err: at com.sockettollnate.socket.WebsocketTransport.onMessage(WebsocketTransport.java:188)
07-29 02:43:50.077 7325-8261/com.sockettollnate W/System.err: at org.java_websocket.client.WebSocketClient.onWebsocketMessage(WebSocketClient.java:339)
07-29 02:43:50.077 7325-8261/com.sockettollnate W/System.err: at org.java_websocket.WebSocketImpl.decodeFrames(WebSocketImpl.java:448)
07-29 02:43:50.077 7325-8261/com.sockettollnate W/System.err: at org.java_websocket.WebSocketImpl.decode(WebSocketImpl.java:201)
07-29 02:43:50.077 7325-8261/com.sockettollnate W/System.err: at org.java_websocket.client.WebSocketClient.run(WebSocketClient.java:276)
07-29 02:43:50.077 7325-8261/com.sockettollnate W/System.err: at java.lang.Thread.run(Thread.java:841)

[marci4]

Hello @arpitjoshi08,

first of all I have no idea if https://github.com/Gottox/socket.io-java-client is implementing the websocket protocol correctly. So there also may be issues there?

Could you please tell me on what specific device versions you are getting this error? Does this only happen in production or also in the emulator?

1.3.4 introduces a feature which detects if the other endpoint is not reachable any more (due to dropped internet etc), so in short all the connections got lost but the underlaying runtime did not detect it on its own.

Greetings
marci4