From b7afe5b036c72866e5317038f9a0e94456b20c92 Mon Sep 17 00:00:00 2001
From: Pascal Scheiben <pascal.scheiben@gmail.com>
Date: Tue, 11 Jun 2019 10:39:00 +0200
Subject: [PATCH] fix when proxy tunneling failed (IOException is hidden)
 JDK-8173620

---
 .../org/java_websocket/client/WebSocketClient.java     | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/main/java/org/java_websocket/client/WebSocketClient.java b/src/main/java/org/java_websocket/client/WebSocketClient.java
index fc86d813..71d0010a 100644
--- a/src/main/java/org/java_websocket/client/WebSocketClient.java
+++ b/src/main/java/org/java_websocket/client/WebSocketClient.java
@@ -28,6 +28,7 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.lang.reflect.InvocationTargetException;
 import java.net.InetSocketAddress;
 import java.net.Proxy;
 import java.net.Socket;
@@ -452,6 +453,15 @@ public void run() {
 			onWebsocketError( engine, e );
 			engine.closeConnection( CloseFrame.NEVER_CONNECTED, e.getMessage() );
 			return;
+		} catch (InternalError e) {
+			// https://bugs.openjdk.java.net/browse/JDK-8173620
+			if (e.getCause() instanceof InvocationTargetException && e.getCause().getCause() instanceof IOException) {
+				IOException cause = (IOException) e.getCause().getCause();
+				onWebsocketError(engine, cause);
+				engine.closeConnection(CloseFrame.NEVER_CONNECTED, cause.getMessage());
+				return;
+			}
+			throw e;
 		}
 
 		writeThread = new Thread( new WebsocketWriteThread(this) );