8023390: Test java/net/NetworkInterface/MemLeakTest.java failed with the latest jdk8 build

Summary: Removing the test as it is unreliable and fails intermittently
Reviewed-by: chegar

test/java/net/NetworkInterface/MemLeakTest.java

-/*
- * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-/* @test
- * @bug 8022584
- * @summary Some NetworkInterface methods can leak native memory
- * @run main/othervm/timeout=700 MemLeakTest
- */
-
-/* Note: the test can cause a memory leak that's why othervm option is required
- */
-
-import java.io.BufferedReader;
-import java.io.FileReader;
-import java.net.NetworkInterface;
-import java.net.SocketException;
-import java.util.Collection;
-import java.util.Collections;
-
-public class MemLeakTest {
-
-    /**
-     * Memory leak is assumed, if application consumes more than specified amount of memory during its execution.
-     * The number is given in Kb.
-     */
-    private static final long MEM_LEAK_THRESHOLD = 32 * 1024; // 32Mb
-
-    public static void main(String[] args)
-            throws Exception {
-
-        if (!System.getProperty("os.name").equals("Linux")) {
-            System.out.println("Test only runs on Linux");
-            return;
-        }
-
-        // warm up
-        accessNetInterfaces(3);
-
-        long vMemBefore = getVMemSize();
-        accessNetInterfaces(500_000);
-        long vMemAfter = getVMemSize();
-
-        long vMemDelta = vMemAfter - vMemBefore;
-        if (vMemDelta > MEM_LEAK_THRESHOLD) {
-            throw new Exception("FAIL: Virtual memory usage increased by " + vMemDelta + "Kb " +
-                    "(greater than " + MEM_LEAK_THRESHOLD + "Kb)");
-        }
-
-        System.out.println("PASS: Virtual memory usage increased by " + vMemDelta + "Kb " +
-                "(not greater than " + MEM_LEAK_THRESHOLD + "Kb)");
-    }
-
-    private static void accessNetInterfaces(int times) {
-        try {
-            Collection<NetworkInterface> interfaces =
-                    Collections.list(NetworkInterface.getNetworkInterfaces());
-            for (int i = 0; i != times; ++i) {
-                for (NetworkInterface netInterface : interfaces) {
-                    netInterface.getMTU();
-                    netInterface.isLoopback();
-                    netInterface.isUp();
-                    netInterface.isPointToPoint();
-                    netInterface.supportsMulticast();
-                }
-            }
-        } catch (SocketException ignore) {}
-    }
-
-    /**
-     * Returns size of virtual memory allocated to the process in Kb.
-     * Linux specific. On other platforms and in case of any errors returns 0.
-     */
-    private static long getVMemSize() {
-
-        // Refer to the Linux proc(5) man page for details about /proc/self/stat file
-        //
-        // In short, this file contains status information about the current process
-        // written in one line. The fields are separated with spaces.
-        // The 23rd field is defined as 'vsize %lu   Virtual memory size in bytes'
-
-        try (FileReader fileReader = new FileReader("/proc/self/stat");
-             BufferedReader bufferedReader = new BufferedReader(fileReader)) {
-            String line = bufferedReader.readLine();
-            return Long.parseLong(line.split(" ")[22]) / 1024;
-        } catch (Exception ignore) {}
-        return 0;
-    }
-}