Kill the process before attempting to drain the streams

The output stream for a process is only closed once the
process has quit. Gosh knows how we managed to get this
to work before, but we now do this.

Author: shs96c

java/client/src/org/openqa/selenium/os/UnixProcess.java

@@ -42,6 +42,7 @@
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.TimeUnit;
+import java.util.logging.Level;
 import java.util.logging.Logger;
 
 class UnixProcess implements OsProcess {
@@ -115,6 +116,19 @@ public int destroy() {
     SeleniumWatchDog watchdog = executeWatchdog;
     watchdog.waitForProcessStarted();
 
+    // I literally have no idea why we don't try and kill the process nicely on Windows. If you do,
+    // answers on the back of a postcard to SeleniumHQ, please.
+    if (!thisIsWindows()) {
+      watchdog.destroyProcess();
+      watchdog.waitForTerminationAfterDestroy(2, SECONDS);
+    }
+
+    if (isRunning()) {
+      watchdog.destroyHarder();
+      watchdog.waitForTerminationAfterDestroy(1, SECONDS);
+    }
+
+    // Make a best effort to drain the streams.
     if (streamHandler != null) {
       // Stop trying to read the output stream so that we don't race with the stream being closed
       // when the process is destroyed.
@@ -123,20 +137,13 @@ public int destroy() {
         streamHandler.stop();
       } catch (IOException e) {
         // Ignore and destroy the process anyway.
+        log.log(
+            Level.INFO,
+            "Unable to drain process streams. Ignoring but the exception being swallowed follows.",
+            e);
       }
     }
 
-    if (!thisIsWindows()) {
-      watchdog.destroyProcess();
-      watchdog.waitForTerminationAfterDestroy(2, SECONDS);
-      if (!isRunning()) {
-        return getExitCode();
-      }
-      log.info("Command failed to close cleanly. Destroying forcefully (v2). " + this);
-    }
-
-    watchdog.destroyHarder();
-    watchdog.waitForTerminationAfterDestroy(1, SECONDS);
     if (!isRunning()) {
       return getExitCode();
     }