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From: eribeiro <git@git.apache.org>
To: dev@zookeeper.apache.org
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References: <git-pr-307-zookeeper@git.apache.org>
In-Reply-To: <git-pr-307-zookeeper@git.apache.org>
Subject: [GitHub] zookeeper pull request #307: ZOOKEEPER-2770 ZooKeeper slow operation log
Content-Type: text/plain
Message-Id: <20170717035430.BC10CF3243@git1-us-west.apache.org>
Date: Mon, 17 Jul 2017 03:54:30 +0000 (UTC)
archived-at: Mon, 17 Jul 2017 03:54:34 -0000

Github user eribeiro commented on a diff in the pull request:

    https://github.com/apache/zookeeper/pull/307#discussion_r127627805
  
    --- Diff: src/java/test/org/apache/zookeeper/server/ZooKeeperServerMainTest.java ---
    @@ -138,14 +145,56 @@ void delete(File f) throws IOException {
             ServerCnxnFactory getCnxnFactory() {
                 return main.getCnxnFactory();
             }
    +
         }
     
    -    public static  class TestZKSMain extends ZooKeeperServerMain {
    +    public static class TestZKSMain extends ZooKeeperServerMain {
    +
    +        private ServerStats serverStats;
    +
    +        @Override
    +        public ZooKeeperServer getZooKeeperServer(FileTxnSnapLog txnLog, ServerConfig config, ZKDatabase zkDb) {
    +            ZooKeeperServer zooKeeperServer = super.getZooKeeperServer(txnLog, config, zkDb);
    +            serverStats = zooKeeperServer.serverStats();
    +            return zooKeeperServer;
    +        }
    +
    +        @Override
             public void shutdown() {
                 super.shutdown();
             }
         }
     
    +    // Test for ZOOKEEPER-2770 ZooKeeper slow operation log
    +    @Test
    +    public void testRequestWarningThreshold() throws IOException, KeeperException, InterruptedException {
    +        ClientBase.setupTestEnv();
    +
    +        final int CLIENT_PORT = PortAssignment.unique();
    +
    +        MainThread main = new MainThread(CLIENT_PORT, true, null, 0);
    +        main.start();
    +
    +        Assert.assertTrue("waiting for server being up",
    +                ClientBase.waitForServerUp("127.0.0.1:" + CLIENT_PORT,
    +                        CONNECTION_TIMEOUT));
    +        // Get the stats object from the ZooKeeperServer to keep track of high latency requests.
    +        ServerStats stats = main.main.serverStats;
    +
    +        ZooKeeper zk = new ZooKeeper("127.0.0.1:" + CLIENT_PORT,
    +                ClientBase.CONNECTION_TIMEOUT, this);
    +
    +        zk.create("/foo1", "foobar".getBytes(), Ids.OPEN_ACL_UNSAFE,
    +                CreateMode.PERSISTENT);
    +
    +        Assert.assertEquals(new String(zk.getData("/foo1", null, null)), "foobar");
    +        // It takes a while for the counter to get updated sometimes, this is added to reduce flakyness
    +        Thread.sleep(1000);
    --- End diff --
    
    wondering why... 🤔 I have run this test case a couple of times, but was unable to see this lag in counter updated manifested as assertion failure. Did you see this consistently?


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