Examples with NodeIdHostMatcher voldemort.server.NodeIdHostMatcher used on opensource projects

Example 1 with NodeIdHostMatcher

use of voldemort.server.NodeIdHostMatcher in project voldemort by voldemort.

the class ReplaceNodeTest method testNodeDownReplacement.

@Test
public void testNodeDownReplacement() throws Exception {
    final int REPLACEMENT_NODE = 0;
    // This is to simulate the case where a machine failed but hard disk was intact
    // In this case we will move the hard disk to another machine, edit the cluster.xml
    // to point to this host and start this machine.
    // The case is simulated by remembering the cluster of node A.
    // Replace this node with node B. Now create a new server with cluster of
    // node A ( this is to simulate the cluster.xml edit) and data directory of B
    // ( this is to simulate the hard disk move). Now try replacing the node B with
    // newly created node after shutting down the node B.
    Cluster cluster = originalServers[nodeToBeReplaced].getMetadataStore().getCluster();
    List<StoreDefinition> storeDefs = originalServers[nodeToBeReplaced].getMetadataStore().getStoreDefList();
    Node node = originalServers[nodeToBeReplaced].getIdentityNode();
    //Verify the node down scenario first
    final boolean DO_RESTORE = false;
    final boolean STOP_OLD_NODE = true;
    verifyNodeReplacement(nodeToBeReplaced, otherServers, REPLACEMENT_NODE, STOP_OLD_NODE, DO_RESTORE);
    // Now the replacement node is part of the original cluster.
    // Stop the replacement node, assume you moved the hard disk
    // to a new node ( This is done by starting another node)
    // that points to the data directory of the replacement node.
    String baseDirPath = otherServers[REPLACEMENT_NODE].getVoldemortConfig().getVoldemortHome();
    // Using ServerTestUtils stopVoldemortServer also deletes the data
    // directory so using the stop, to simulate the hard disk move.
    otherServers[REPLACEMENT_NODE].stop();
    VoldemortConfig config = ServerTestUtils.createServerConfigWithDefs(true, node.getId(), baseDirPath, cluster, storeDefs, new Properties());
    Assert.assertTrue(config.isSlopEnabled());
    Assert.assertTrue(config.isSlopPusherJobEnabled());
    Assert.assertTrue(config.getAutoPurgeDeadSlops());
    config.setSlopFrequencyMs(8000L);
    config.setEnableNodeIdDetection(this.autoDetectNodeId);
    if (this.autoDetectNodeId) {
        config.setNodeIdImplementation(new NodeIdHostMatcher(nodeToBeReplaced));
    }
    // Though baseDir is used as part of Config, TestUtils, always appends
    // it with node- (nodeId). So forcefully overwriting it here to point to
    // the old directory.
    config.setVoldemortHome(baseDirPath);
    SocketStoreFactory ssf = new TestSocketStoreFactory();
    VoldemortServer hardDiskMovedServer = ServerTestUtils.startVoldemortServer(ssf, config, cluster);
    ssf.close();
    otherServers[REPLACEMENT_NODE] = hardDiskMovedServer;
    final boolean SKIP_RESTORE = true;
    final boolean DONOT_STOP_OLD_NODE = true;
    verifyNodeReplacement(nodeToBeReplaced, otherServers, REPLACEMENT_NODE, DONOT_STOP_OLD_NODE, SKIP_RESTORE);
}