Examples with RegionStates org.apache.hadoop.hbase.master.assignment.RegionStates used on opensource projects

Example 26 with RegionStates

use of org.apache.hadoop.hbase.master.assignment.RegionStates in project hbase by apache.

the class TestFavoredStochasticLoadBalancer method testAllFavoredNodesDead.

@Ignore
@Test
public void testAllFavoredNodesDead() throws Exception {
    TableName tableName = TableName.valueOf("testAllFavoredNodesDead");
    TableDescriptor tableDescriptor = TableDescriptorBuilder.newBuilder(tableName).setColumnFamily(ColumnFamilyDescriptorBuilder.of(HConstants.CATALOG_FAMILY)).build();
    admin.createTable(tableDescriptor, Bytes.toBytes("aaa"), Bytes.toBytes("zzz"), REGION_NUM);
    TEST_UTIL.waitTableAvailable(tableName);
    final RegionInfo region = admin.getRegions(tableName).get(0);
    LOG.info("Region that's supposed to be in transition: " + region);
    FavoredNodesManager fnm = master.getFavoredNodesManager();
    List<ServerName> currentFN = fnm.getFavoredNodes(region);
    assertNotNull(currentFN);
    // Lets kill all the RS that are favored nodes for this region.
    stopServersAndWaitUntilProcessed(currentFN);
    final RegionStates regionStates = master.getAssignmentManager().getRegionStates();
    TEST_UTIL.waitFor(10000, new Waiter.Predicate<Exception>() {

        @Override
        public boolean evaluate() throws Exception {
            return regionStates.getRegionState(region).isFailedOpen();
        }
    });
    assertTrue("Region: " + region + " should be RIT", regionStates.getRegionState(region).isFailedOpen());
    // Regenerate FN and assign, everything else should be fine
    List<ServerName> serversForNewFN = Lists.newArrayList();
    for (ServerName sn : admin.getClusterMetrics(EnumSet.of(Option.LIVE_SERVERS)).getLiveServerMetrics().keySet()) {
        serversForNewFN.add(ServerName.valueOf(sn.getHostname(), sn.getPort(), NON_STARTCODE));
    }
    FavoredNodeAssignmentHelper helper = new FavoredNodeAssignmentHelper(serversForNewFN, conf);
    helper.initialize();
    for (RegionStateNode regionState : regionStates.getRegionsInTransition()) {
        RegionInfo regionInfo = regionState.getRegionInfo();
        List<ServerName> newFavoredNodes = helper.generateFavoredNodes(regionInfo);
        assertNotNull(newFavoredNodes);
        assertEquals(FavoredNodeAssignmentHelper.FAVORED_NODES_NUM, newFavoredNodes.size());
        LOG.info("Region: " + regionInfo.getEncodedName() + " FN: " + newFavoredNodes);
        Map<RegionInfo, List<ServerName>> regionFNMap = Maps.newHashMap();
        regionFNMap.put(regionInfo, newFavoredNodes);
        fnm.updateFavoredNodes(regionFNMap);
        LOG.info("Assigning region: " + regionInfo.getEncodedName());
        admin.assign(regionInfo.getEncodedNameAsBytes());
    }
    TEST_UTIL.waitUntilNoRegionsInTransition(60000);
    assertEquals("Not all regions are online", REGION_NUM, admin.getRegions(tableName).size());
    admin.balancerSwitch(true, true);
    assertTrue("Balancer did not run", admin.balance());
    TEST_UTIL.waitUntilNoRegionsInTransition(60000);
    checkFavoredNodeAssignments(tableName, fnm, regionStates);
}