Examples with EMPTY_START_ROW org.apache.hadoop.hbase.HConstants.EMPTY_START_ROW used on opensource projects

Example 1 with EMPTY_START_ROW

use of org.apache.hadoop.hbase.HConstants.EMPTY_START_ROW in project hbase by apache.

the class TestAsyncNonMetaRegionLocator method testLocateAfter.

// usually locate after will return the same result, so we add a test to make it return different
// result.
@Test
public void testLocateAfter() throws IOException, InterruptedException, ExecutionException {
    byte[] row = Bytes.toBytes("1");
    byte[] splitKey = Arrays.copyOf(row, 2);
    TEST_UTIL.createTable(TABLE_NAME, FAMILY, new byte[][] { splitKey });
    TEST_UTIL.waitTableAvailable(TABLE_NAME);
    HRegionLocation currentLoc = getDefaultRegionLocation(TABLE_NAME, row, RegionLocateType.CURRENT, false).get();
    ServerName currentServerName = TEST_UTIL.getRSForFirstRegionInTable(TABLE_NAME).getServerName();
    assertLocEquals(EMPTY_START_ROW, splitKey, currentServerName, currentLoc);
    HRegionLocation afterLoc = getDefaultRegionLocation(TABLE_NAME, row, RegionLocateType.AFTER, false).get();
    ServerName afterServerName = TEST_UTIL.getHBaseCluster().getRegionServerThreads().stream().map(t -> t.getRegionServer()).filter(rs -> rs.getRegions(TABLE_NAME).stream().anyMatch(r -> Bytes.equals(splitKey, r.getRegionInfo().getStartKey()))).findAny().get().getServerName();
    assertLocEquals(splitKey, EMPTY_END_ROW, afterServerName, afterLoc);
    assertSame(afterLoc, getDefaultRegionLocation(TABLE_NAME, row, RegionLocateType.AFTER, false).get());
}

Example 2 with EMPTY_START_ROW

use of org.apache.hadoop.hbase.HConstants.EMPTY_START_ROW in project hbase by apache.

the class TestAsyncNonMetaRegionLocator method testReload.

@Test
public void testReload() throws Exception {
    createSingleRegionTable();
    ServerName serverName = TEST_UTIL.getRSForFirstRegionInTable(TABLE_NAME).getServerName();
    for (RegionLocateType locateType : RegionLocateType.values()) {
        assertLocEquals(EMPTY_START_ROW, EMPTY_END_ROW, serverName, getDefaultRegionLocation(TABLE_NAME, EMPTY_START_ROW, locateType, false).get());
    }
    ServerName newServerName = TEST_UTIL.getHBaseCluster().getRegionServerThreads().stream().map(t -> t.getRegionServer().getServerName()).filter(sn -> !sn.equals(serverName)).findAny().get();
    Admin admin = TEST_UTIL.getAdmin();
    RegionInfo region = admin.getRegions(TABLE_NAME).stream().findAny().get();
    admin.move(region.getEncodedNameAsBytes(), newServerName);
    TEST_UTIL.waitFor(30000, new ExplainingPredicate<Exception>() {

        @Override
        public boolean evaluate() throws Exception {
            ServerName newServerName = TEST_UTIL.getRSForFirstRegionInTable(TABLE_NAME).getServerName();
            return newServerName != null && !newServerName.equals(serverName);
        }

        @Override
        public String explainFailure() throws Exception {
            return region.getRegionNameAsString() + " is still on " + serverName;
        }
    });
    // The cached location will not change
    for (RegionLocateType locateType : RegionLocateType.values()) {
        assertLocEquals(EMPTY_START_ROW, EMPTY_END_ROW, serverName, getDefaultRegionLocation(TABLE_NAME, EMPTY_START_ROW, locateType, false).get());
    }
    // should get the new location when reload = true
    // when meta replica LoadBalance mode is enabled, it may delay a bit.
    TEST_UTIL.waitFor(3000, new ExplainingPredicate<Exception>() {

        @Override
        public boolean evaluate() throws Exception {
            HRegionLocation loc = getDefaultRegionLocation(TABLE_NAME, EMPTY_START_ROW, RegionLocateType.CURRENT, true).get();
            return newServerName.equals(loc.getServerName());
        }

        @Override
        public String explainFailure() throws Exception {
            return "New location does not show up in meta (replica) region";
        }
    });
    // the cached location should be replaced
    for (RegionLocateType locateType : RegionLocateType.values()) {
        assertLocEquals(EMPTY_START_ROW, EMPTY_END_ROW, newServerName, getDefaultRegionLocation(TABLE_NAME, EMPTY_START_ROW, locateType, false).get());
    }
}

Example 3 with EMPTY_START_ROW

use of org.apache.hadoop.hbase.HConstants.EMPTY_START_ROW in project hbase by apache.

the class TestAsyncNonMetaRegionLocator method testRegionMove.

@Test
public void testRegionMove() throws IOException, InterruptedException, ExecutionException {
    createSingleRegionTable();
    ServerName serverName = TEST_UTIL.getRSForFirstRegionInTable(TABLE_NAME).getServerName();
    HRegionLocation loc = getDefaultRegionLocation(TABLE_NAME, EMPTY_START_ROW, RegionLocateType.CURRENT, false).get();
    assertLocEquals(EMPTY_START_ROW, EMPTY_END_ROW, serverName, loc);
    ServerName newServerName = TEST_UTIL.getHBaseCluster().getRegionServerThreads().stream().map(t -> t.getRegionServer().getServerName()).filter(sn -> !sn.equals(serverName)).findAny().get();
    TEST_UTIL.getAdmin().move(Bytes.toBytes(loc.getRegion().getEncodedName()), newServerName);
    while (!TEST_UTIL.getRSForFirstRegionInTable(TABLE_NAME).getServerName().equals(newServerName)) {
        Thread.sleep(100);
    }
    // Should be same as it is in cache
    assertSame(loc, getDefaultRegionLocation(TABLE_NAME, EMPTY_START_ROW, RegionLocateType.CURRENT, false).get());
    locator.updateCachedLocationOnError(loc, null);
    // null error will not trigger a cache cleanup
    assertSame(loc, getDefaultRegionLocation(TABLE_NAME, EMPTY_START_ROW, RegionLocateType.CURRENT, false).get());
    locator.updateCachedLocationOnError(loc, new NotServingRegionException());
    assertLocEquals(EMPTY_START_ROW, EMPTY_END_ROW, newServerName, getDefaultRegionLocation(TABLE_NAME, EMPTY_START_ROW, RegionLocateType.CURRENT, false).get());
}