Replacing entry via HotRod which was initially stored via Memcached does not change CAS --------------------------------------------------------------------------------------- Key: ISPN-3163 URL: https://issues.jboss.org/browse/ISPN-3163 Project: Infinispan Issue Type: Bug Affects Versions: 5.3.0.CR1 Reporter: Martin Gencur Assignee: Galder Zamarreño Fix For: 5.3.0.Final Users might expect that CAS (check-and-set) operation will work even in compatibility mode which is currently not true in the following scenario: 1) store a key/value via Memcached 2) change the value via HotRod or Embedded 3) use Memcached's CAS operation In step #3 the memcached client will update the value even though the value was changed by another client in the meantime. The memcached client was supposed to change it only if it had not been changed in the meantime. The following test snippet shows the problem: {code:java} public void testMemcachedPutHotRodEmbbeddedReplaceMemcachedCASTest() throws Exception { final String key1 = "5"; // 1. Put with Memcached Future<Boolean> f = cacheFactory.getMemcachedClient().set(key1, 0, "v1"); assertTrue(f.get(60, TimeUnit.SECONDS)); CASValue oldValue = cacheFactory.getMemcachedClient().gets(key1); // 2. Replace with Hot Rod VersionedValue versioned = cacheFactory.getHotRodCache().getVersioned(key1); assertTrue(cacheFactory.getHotRodCache().replaceWithVersion(key1, "v2", versioned.getVersion())); // 3. Replace with Embedded assertTrue(cacheFactory.getEmbeddedCache().replace(key1, "v2", "v3")); // 4. Get with Memcached and verify value/CAS CASValue newValue = cacheFactory.getMemcachedClient().gets(key1); assertEquals("v3", newValue.getValue()); assertTrue("The version (CAS) should have changed", oldValue.getCas() != newValue.getCas()); //<---- fails here } {code}