| /* |
| * Copyright (c) 2002, 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 4292867 |
| * @summary Check that InetAddress doesn't continue to throw UHE |
| * after the name service has recovered and the negative ttl |
| * on the initial lookup has expired. |
| * |
| * @build CacheTest SimpleNameService SimpleNameServiceDescriptor |
| * @run main/othervm/timeout=200 -Dsun.net.spi.nameservice.provider.1=simple,sun CacheTest |
| */ |
| import java.net.InetAddress; |
| import java.net.UnknownHostException; |
| import java.security.Security; |
| |
| public class CacheTest { |
| |
| |
| public static void main(String args[]) throws Exception { |
| |
| /* |
| * First check the ttl on negative lookups is in the <15 second |
| * range. If the ttl is <=0 it means we cache forever or always |
| * consult the name service. For ttl > 15 the test would take |
| * too long so we skip it (need to coordinate jtreg timeout |
| * with negative ttl) |
| */ |
| String ttlProp = "networkaddress.cache.negative.ttl"; |
| int ttl = 0; |
| String policy = Security.getProperty(ttlProp); |
| if (policy != null) { |
| ttl = Integer.parseInt(policy); |
| } |
| if (ttl <= 0 || ttl > 15) { |
| System.err.println("Security property " + ttlProp + " needs to " + |
| " in 1-15 second range to execute this test"); |
| return; |
| |
| } |
| |
| /* |
| * The following outlines how the test works :- |
| * |
| * 1. Do a lookup via InetAddress.getByName that it guaranteed |
| * to succeed. This forces at least one entry into the cache |
| * that will not expire. |
| * |
| * 2. Do a lookup via InetAddress.getByName that is guarnateed |
| * to fail. This results in a negative lookup cached for |
| * for a short period to time. |
| * |
| * 3. Wait for the cache entry to expire. |
| * |
| * 4. Do a lookup (which should consult the name service) and |
| * the lookup should succeed. |
| */ |
| |
| // name service needs to resolve this. |
| SimpleNameService.put("theclub", "129.156.220.219"); |
| |
| // this lookup will succeed |
| InetAddress.getByName("theclub"); |
| |
| // lookup "luster" - this should throw UHE as name service |
| // doesn't know anything about this host. |
| |
| try { |
| InetAddress.getByName("luster"); |
| throw new RuntimeException("Test internal error " + |
| " - luster is bring resolved by name service"); |
| } catch (UnknownHostException x) { |
| } |
| |
| // name service now needs to know about luster |
| SimpleNameService.put("luster", "10.5.18.21"); |
| |
| // wait for the cache entry to expire and lookup should |
| // succeed. |
| Thread.currentThread().sleep(ttl*1000 + 1000); |
| InetAddress.getByName("luster"); |
| } |
| |
| } |