Examples with CountDownLatch java.util.concurrent.CountDownLatch used on opensource projects

Example 86 with CountDownLatch

use of java.util.concurrent.CountDownLatch in project hbase by apache.

the class TestBlockEvictionFromClient method testParallelGetsAndScanWithWrappedRegionScanner.

@Test
public void testParallelGetsAndScanWithWrappedRegionScanner() throws IOException, InterruptedException {
    Table table = null;
    try {
        latch = new CountDownLatch(2);
        // Check if get() returns blocks on its close() itself
        getLatch = new CountDownLatch(1);
        final TableName tableName = TableName.valueOf(name.getMethodName());
        // Create KV that will give you two blocks
        // Create a table with block size as 1024
        table = TEST_UTIL.createTable(tableName, FAMILIES_1, 1, 1024, CustomInnerRegionObserverWrapper.class.getName());
        // get the block cache and region
        RegionLocator locator = TEST_UTIL.getConnection().getRegionLocator(tableName);
        String regionName = locator.getAllRegionLocations().get(0).getRegionInfo().getEncodedName();
        Region region = TEST_UTIL.getRSForFirstRegionInTable(tableName).getFromOnlineRegions(regionName);
        Store store = region.getStores().iterator().next();
        CacheConfig cacheConf = store.getCacheConfig();
        cacheConf.setCacheDataOnWrite(true);
        cacheConf.setEvictOnClose(true);
        BlockCache cache = cacheConf.getBlockCache();
        // insert data. 2 Rows are added
        insertData(table);
        // flush the data
        System.out.println("Flushing cache");
        // Should create one Hfile with 2 blocks
        region.flush(true);
        // CustomInnerRegionObserver.sleepTime.set(5000);
        // Create three sets of scan
        CustomInnerRegionObserver.waitForGets.set(true);
        ScanThread[] scanThreads = initiateScan(table, false);
        // Create three sets of gets
        GetThread[] getThreads = initiateGet(table, false, false);
        // The block would have been decremented for the scan case as it was
        // wrapped
        // before even the postNext hook gets executed.
        // giving some time for the block to be decremented
        Thread.sleep(100);
        CustomInnerRegionObserver.waitForGets.set(false);
        checkForBlockEviction(cache, false, false);
        // countdown the latch
        CustomInnerRegionObserver.getCdl().get().countDown();
        for (GetThread thread : getThreads) {
            thread.join();
        }
        getLatch.countDown();
        for (ScanThread thread : scanThreads) {
            thread.join();
        }
    } finally {
        if (table != null) {
            table.close();
        }
    }
}

Example 87 with CountDownLatch

use of java.util.concurrent.CountDownLatch in project hbase by apache.

the class TestBlockEvictionFromClient method testBlockEvictionWithParallelScans.

@Test
public void testBlockEvictionWithParallelScans() throws Exception {
    Table table = null;
    try {
        latch = new CountDownLatch(1);
        final TableName tableName = TableName.valueOf(name.getMethodName());
        // Create a table with block size as 1024
        table = TEST_UTIL.createTable(tableName, FAMILIES_1, 1, 1024, CustomInnerRegionObserver.class.getName());
        // get the block cache and region
        RegionLocator locator = TEST_UTIL.getConnection().getRegionLocator(tableName);
        String regionName = locator.getAllRegionLocations().get(0).getRegionInfo().getEncodedName();
        Region region = TEST_UTIL.getRSForFirstRegionInTable(tableName).getFromOnlineRegions(regionName);
        Store store = region.getStores().iterator().next();
        CacheConfig cacheConf = store.getCacheConfig();
        cacheConf.setCacheDataOnWrite(true);
        cacheConf.setEvictOnClose(true);
        BlockCache cache = cacheConf.getBlockCache();
        // insert data. 2 Rows are added
        Put put = new Put(ROW);
        put.addColumn(FAMILY, QUALIFIER, data);
        table.put(put);
        put = new Put(ROW1);
        put.addColumn(FAMILY, QUALIFIER, data);
        table.put(put);
        assertTrue(Bytes.equals(table.get(new Get(ROW)).value(), data));
        // data was in memstore so don't expect any changes
        // flush the data
        System.out.println("Flushing cache in problematic area");
        // Should create one Hfile with 2 blocks
        region.flush(true);
        // Load cache
        // Create three sets of scan
        ScanThread[] scanThreads = initiateScan(table, false);
        Thread.sleep(100);
        checkForBlockEviction(cache, false, false);
        for (ScanThread thread : scanThreads) {
            thread.join();
        }
        // CustomInnerRegionObserver.sleepTime.set(0);
        Iterator<CachedBlock> iterator = cache.iterator();
        iterateBlockCache(cache, iterator);
        // read the data and expect same blocks, one new hit, no misses
        assertTrue(Bytes.equals(table.get(new Get(ROW)).value(), data));
        iterator = cache.iterator();
        iterateBlockCache(cache, iterator);
        // Check how this miss is happening
        // insert a second column, read the row, no new blocks, 3 new hits
        byte[] QUALIFIER2 = Bytes.add(QUALIFIER, QUALIFIER);
        byte[] data2 = Bytes.add(data, data);
        put = new Put(ROW);
        put.addColumn(FAMILY, QUALIFIER2, data2);
        table.put(put);
        Result r = table.get(new Get(ROW));
        assertTrue(Bytes.equals(r.getValue(FAMILY, QUALIFIER), data));
        assertTrue(Bytes.equals(r.getValue(FAMILY, QUALIFIER2), data2));
        iterator = cache.iterator();
        iterateBlockCache(cache, iterator);
        // flush, one new block
        System.out.println("Flushing cache");
        region.flush(true);
        iterator = cache.iterator();
        iterateBlockCache(cache, iterator);
        // compact, net minus two blocks, two hits, no misses
        System.out.println("Compacting");
        assertEquals(2, store.getStorefilesCount());
        store.triggerMajorCompaction();
        region.compact(true);
        // wait 10 seconds max
        waitForStoreFileCount(store, 1, 10000);
        assertEquals(1, store.getStorefilesCount());
        iterator = cache.iterator();
        iterateBlockCache(cache, iterator);
        // read the row, this should be a cache miss because we don't cache data
        // blocks on compaction
        r = table.get(new Get(ROW));
        assertTrue(Bytes.equals(r.getValue(FAMILY, QUALIFIER), data));
        assertTrue(Bytes.equals(r.getValue(FAMILY, QUALIFIER2), data2));
        iterator = cache.iterator();
        iterateBlockCache(cache, iterator);
    } finally {
        if (table != null) {
            table.close();
        }
    }
}

Example 88 with CountDownLatch

use of java.util.concurrent.CountDownLatch in project hbase by apache.

the class TestBlockEvictionFromClient method testScanWithCompactionInternals.

private void testScanWithCompactionInternals(String tableNameStr, boolean reversed) throws IOException, InterruptedException {
    Table table = null;
    try {
        latch = new CountDownLatch(1);
        compactionLatch = new CountDownLatch(1);
        TableName tableName = TableName.valueOf(tableNameStr);
        // Create a table with block size as 1024
        table = TEST_UTIL.createTable(tableName, FAMILIES_1, 1, 1024, CustomInnerRegionObserverWrapper.class.getName());
        // get the block cache and region
        RegionLocator locator = TEST_UTIL.getConnection().getRegionLocator(tableName);
        String regionName = locator.getAllRegionLocations().get(0).getRegionInfo().getEncodedName();
        Region region = TEST_UTIL.getRSForFirstRegionInTable(tableName).getFromOnlineRegions(regionName);
        Store store = region.getStores().iterator().next();
        CacheConfig cacheConf = store.getCacheConfig();
        cacheConf.setCacheDataOnWrite(true);
        cacheConf.setEvictOnClose(true);
        BlockCache cache = cacheConf.getBlockCache();
        // insert data. 2 Rows are added
        Put put = new Put(ROW);
        put.addColumn(FAMILY, QUALIFIER, data);
        table.put(put);
        put = new Put(ROW1);
        put.addColumn(FAMILY, QUALIFIER, data);
        table.put(put);
        assertTrue(Bytes.equals(table.get(new Get(ROW)).value(), data));
        // Should create one Hfile with 2 blocks
        region.flush(true);
        // read the data and expect same blocks, one new hit, no misses
        int refCount = 0;
        // Check how this miss is happening
        // insert a second column, read the row, no new blocks, 3 new hits
        byte[] QUALIFIER2 = Bytes.add(QUALIFIER, QUALIFIER);
        byte[] data2 = Bytes.add(data, data);
        put = new Put(ROW);
        put.addColumn(FAMILY, QUALIFIER2, data2);
        table.put(put);
        // flush, one new block
        System.out.println("Flushing cache");
        region.flush(true);
        Iterator<CachedBlock> iterator = cache.iterator();
        iterateBlockCache(cache, iterator);
        // Create three sets of scan
        ScanThread[] scanThreads = initiateScan(table, reversed);
        Thread.sleep(100);
        iterator = cache.iterator();
        boolean usedBlocksFound = false;
        while (iterator.hasNext()) {
            CachedBlock next = iterator.next();
            BlockCacheKey cacheKey = new BlockCacheKey(next.getFilename(), next.getOffset());
            if (cache instanceof BucketCache) {
                refCount = ((BucketCache) cache).getRefCount(cacheKey);
            } else if (cache instanceof CombinedBlockCache) {
                refCount = ((CombinedBlockCache) cache).getRefCount(cacheKey);
            } else {
                continue;
            }
            if (refCount != 0) {
                // Blocks will be with count 3
                assertEquals(NO_OF_THREADS, refCount);
                usedBlocksFound = true;
            }
        }
        assertTrue("Blocks with non zero ref count should be found ", usedBlocksFound);
        usedBlocksFound = false;
        System.out.println("Compacting");
        assertEquals(2, store.getStorefilesCount());
        store.triggerMajorCompaction();
        region.compact(true);
        // wait 10 seconds max
        waitForStoreFileCount(store, 1, 10000);
        assertEquals(1, store.getStorefilesCount());
        // Even after compaction is done we will have some blocks that cannot
        // be evicted this is because the scan is still referencing them
        iterator = cache.iterator();
        while (iterator.hasNext()) {
            CachedBlock next = iterator.next();
            BlockCacheKey cacheKey = new BlockCacheKey(next.getFilename(), next.getOffset());
            if (cache instanceof BucketCache) {
                refCount = ((BucketCache) cache).getRefCount(cacheKey);
            } else if (cache instanceof CombinedBlockCache) {
                refCount = ((CombinedBlockCache) cache).getRefCount(cacheKey);
            } else {
                continue;
            }
            if (refCount != 0) {
                // Blocks will be with count 3 as they are not yet cleared
                assertEquals(NO_OF_THREADS, refCount);
                usedBlocksFound = true;
            }
        }
        assertTrue("Blocks with non zero ref count should be found ", usedBlocksFound);
        // Should not throw exception
        compactionLatch.countDown();
        latch.countDown();
        for (ScanThread thread : scanThreads) {
            thread.join();
        }
        // by this time all blocks should have been evicted
        iterator = cache.iterator();
        iterateBlockCache(cache, iterator);
        Result r = table.get(new Get(ROW));
        assertTrue(Bytes.equals(r.getValue(FAMILY, QUALIFIER), data));
        assertTrue(Bytes.equals(r.getValue(FAMILY, QUALIFIER2), data2));
        // The gets would be working on new blocks
        iterator = cache.iterator();
        iterateBlockCache(cache, iterator);
    } finally {
        if (table != null) {
            table.close();
        }
    }
}

Example 89 with CountDownLatch

use of java.util.concurrent.CountDownLatch in project hbase by apache.

the class TestBlockEvictionFromClient method testScanWithException.

@Test
public void testScanWithException() throws IOException, InterruptedException {
    Table table = null;
    try {
        latch = new CountDownLatch(1);
        exceptionLatch = new CountDownLatch(1);
        final TableName tableName = TableName.valueOf(name.getMethodName());
        // Create KV that will give you two blocks
        // Create a table with block size as 1024
        table = TEST_UTIL.createTable(tableName, FAMILIES_1, 1, 1024, CustomInnerRegionObserverWrapper.class.getName());
        // get the block cache and region
        RegionLocator locator = TEST_UTIL.getConnection().getRegionLocator(tableName);
        String regionName = locator.getAllRegionLocations().get(0).getRegionInfo().getEncodedName();
        Region region = TEST_UTIL.getRSForFirstRegionInTable(tableName).getFromOnlineRegions(regionName);
        Store store = region.getStores().iterator().next();
        CacheConfig cacheConf = store.getCacheConfig();
        cacheConf.setCacheDataOnWrite(true);
        cacheConf.setEvictOnClose(true);
        BlockCache cache = cacheConf.getBlockCache();
        // insert data. 2 Rows are added
        insertData(table);
        // flush the data
        System.out.println("Flushing cache");
        // Should create one Hfile with 2 blocks
        region.flush(true);
        // CustomInnerRegionObserver.sleepTime.set(5000);
        CustomInnerRegionObserver.throwException.set(true);
        ScanThread[] scanThreads = initiateScan(table, false);
        // The block would have been decremented for the scan case as it was
        // wrapped
        // before even the postNext hook gets executed.
        // giving some time for the block to be decremented
        Thread.sleep(100);
        Iterator<CachedBlock> iterator = cache.iterator();
        boolean usedBlocksFound = false;
        int refCount = 0;
        while (iterator.hasNext()) {
            CachedBlock next = iterator.next();
            BlockCacheKey cacheKey = new BlockCacheKey(next.getFilename(), next.getOffset());
            if (cache instanceof BucketCache) {
                refCount = ((BucketCache) cache).getRefCount(cacheKey);
            } else if (cache instanceof CombinedBlockCache) {
                refCount = ((CombinedBlockCache) cache).getRefCount(cacheKey);
            } else {
                continue;
            }
            if (refCount != 0) {
                // Blocks will be with count 3
                assertEquals(NO_OF_THREADS, refCount);
                usedBlocksFound = true;
            }
        }
        assertTrue(usedBlocksFound);
        exceptionLatch.countDown();
        // countdown the latch
        CustomInnerRegionObserver.getCdl().get().countDown();
        for (ScanThread thread : scanThreads) {
            thread.join();
        }
        iterator = cache.iterator();
        usedBlocksFound = false;
        refCount = 0;
        while (iterator.hasNext()) {
            CachedBlock next = iterator.next();
            BlockCacheKey cacheKey = new BlockCacheKey(next.getFilename(), next.getOffset());
            if (cache instanceof BucketCache) {
                refCount = ((BucketCache) cache).getRefCount(cacheKey);
            } else if (cache instanceof CombinedBlockCache) {
                refCount = ((CombinedBlockCache) cache).getRefCount(cacheKey);
            } else {
                continue;
            }
            if (refCount != 0) {
                // Blocks will be with count 3
                assertEquals(NO_OF_THREADS, refCount);
                usedBlocksFound = true;
            }
        }
        assertFalse(usedBlocksFound);
        // you should always see 0 ref count. since after HBASE-16604 we always recreate the scanner
        assertEquals(0, refCount);
    } finally {
        if (table != null) {
            table.close();
        }
    }
}

Example 90 with CountDownLatch

use of java.util.concurrent.CountDownLatch in project hbase by apache.

the class TestBlockEvictionFromClient method testGetsWithMultiColumnsAndExplicitTracker.

@Test
public // TODO : check how block index works here
void testGetsWithMultiColumnsAndExplicitTracker() throws IOException, InterruptedException {
    Table table = null;
    try {
        latch = new CountDownLatch(1);
        // Check if get() returns blocks on its close() itself
        getLatch = new CountDownLatch(1);
        final TableName tableName = TableName.valueOf(name.getMethodName());
        // Create KV that will give you two blocks
        // Create a table with block size as 1024
        table = TEST_UTIL.createTable(tableName, FAMILIES_1, 1, 1024, CustomInnerRegionObserver.class.getName());
        // get the block cache and region
        RegionLocator locator = TEST_UTIL.getConnection().getRegionLocator(tableName);
        String regionName = locator.getAllRegionLocations().get(0).getRegionInfo().getEncodedName();
        Region region = TEST_UTIL.getRSForFirstRegionInTable(tableName).getFromOnlineRegions(regionName);
        BlockCache cache = setCacheProperties(region);
        Put put = new Put(ROW);
        put.addColumn(FAMILY, QUALIFIER, data);
        table.put(put);
        region.flush(true);
        put = new Put(ROW1);
        put.addColumn(FAMILY, QUALIFIER, data);
        table.put(put);
        region.flush(true);
        for (int i = 1; i < 10; i++) {
            put = new Put(ROW);
            put.addColumn(FAMILY, Bytes.toBytes("testQualifier" + i), data2);
            table.put(put);
            if (i % 2 == 0) {
                region.flush(true);
            }
        }
        byte[] QUALIFIER2 = Bytes.add(QUALIFIER, QUALIFIER);
        put = new Put(ROW);
        put.addColumn(FAMILY, QUALIFIER2, data2);
        table.put(put);
        region.flush(true);
        // flush the data
        System.out.println("Flushing cache");
        // Should create one Hfile with 2 blocks
        CustomInnerRegionObserver.waitForGets.set(true);
        // Create three sets of gets
        GetThread[] getThreads = initiateGet(table, true, false);
        Thread.sleep(200);
        Iterator<CachedBlock> iterator = cache.iterator();
        boolean usedBlocksFound = false;
        int refCount = 0;
        int noOfBlocksWithRef = 0;
        while (iterator.hasNext()) {
            CachedBlock next = iterator.next();
            BlockCacheKey cacheKey = new BlockCacheKey(next.getFilename(), next.getOffset());
            if (cache instanceof BucketCache) {
                refCount = ((BucketCache) cache).getRefCount(cacheKey);
            } else if (cache instanceof CombinedBlockCache) {
                refCount = ((CombinedBlockCache) cache).getRefCount(cacheKey);
            } else {
                continue;
            }
            if (refCount != 0) {
                // Blocks will be with count 3
                System.out.println("The refCount is " + refCount);
                assertEquals(NO_OF_THREADS, refCount);
                usedBlocksFound = true;
                noOfBlocksWithRef++;
            }
        }
        assertTrue(usedBlocksFound);
        // the number of blocks referred
        assertEquals(10, noOfBlocksWithRef);
        CustomInnerRegionObserver.getCdl().get().countDown();
        for (GetThread thread : getThreads) {
            thread.join();
        }
        // Verify whether the gets have returned the blocks that it had
        CustomInnerRegionObserver.waitForGets.set(true);
        // giving some time for the block to be decremented
        checkForBlockEviction(cache, true, false);
        getLatch.countDown();
        System.out.println("Gets should have returned the bloks");
    } finally {
        if (table != null) {
            table.close();
        }
    }
}