@Test
public void testRollback() throws IOException {
final int rowcount = TEST_UTIL.loadRegion(this.parent, CF);
assertTrue(rowcount > 0);
int parentRowCount = TEST_UTIL.countRows(this.parent);
assertEquals(rowcount, parentRowCount);
// Start transaction.
HRegion spiedRegion = spy(this.parent);
SplitTransactionImpl st = prepareGOOD_SPLIT_ROW(spiedRegion);
SplitTransactionImpl spiedUponSt = spy(st);
doNothing()
.when(spiedUponSt)
.assertReferenceFileCount(
anyInt(), eq(parent.getRegionFileSystem().getSplitsDir(st.getFirstDaughter())));
when(spiedRegion.createDaughterRegionFromSplits(spiedUponSt.getSecondDaughter()))
.thenThrow(new MockedFailedDaughterCreation());
// Run the execute. Look at what it returns.
boolean expectedException = false;
Server mockServer = Mockito.mock(Server.class);
when(mockServer.getConfiguration()).thenReturn(TEST_UTIL.getConfiguration());
try {
spiedUponSt.execute(mockServer, null);
} catch (MockedFailedDaughterCreation e) {
expectedException = true;
}
assertTrue(expectedException);
// Run rollback
assertTrue(spiedUponSt.rollback(null, null));
// Assert I can scan parent.
int parentRowCount2 = TEST_UTIL.countRows(this.parent);
assertEquals(parentRowCount, parentRowCount2);
// Assert rollback cleaned up stuff in fs
assertTrue(!this.fs.exists(HRegion.getRegionDir(this.testdir, st.getFirstDaughter())));
assertTrue(!this.fs.exists(HRegion.getRegionDir(this.testdir, st.getSecondDaughter())));
assertTrue(!this.parent.lock.writeLock().isHeldByCurrentThread());
// Now retry the split but do not throw an exception this time.
assertTrue(st.prepare());
PairOfSameType<Region> daughters = st.execute(mockServer, null);
// Count rows. daughters are already open
int daughtersRowCount = 0;
for (Region openRegion : daughters) {
try {
int count = TEST_UTIL.countRows(openRegion);
assertTrue(count > 0 && count != rowcount);
daughtersRowCount += count;
} finally {
HBaseTestingUtility.closeRegionAndWAL(openRegion);
}
}
assertEquals(rowcount, daughtersRowCount);
// Assert the write lock is no longer held on parent
assertTrue(!this.parent.lock.writeLock().isHeldByCurrentThread());
assertTrue("Rollback hooks should be called.", wasRollBackHookCalled());
}
@Test
public void testWholesomeSplit() throws IOException {
final int rowcount = TEST_UTIL.loadRegion(this.parent, CF, true);
assertTrue(rowcount > 0);
int parentRowCount = TEST_UTIL.countRows(this.parent);
assertEquals(rowcount, parentRowCount);
// Pretend region's blocks are not in the cache, used for
// testWholesomeSplitWithHFileV1
CacheConfig cacheConf = new CacheConfig(TEST_UTIL.getConfiguration());
((LruBlockCache) cacheConf.getBlockCache()).clearCache();
// Start transaction.
SplitTransactionImpl st = prepareGOOD_SPLIT_ROW();
// Run the execute. Look at what it returns.
Server mockServer = Mockito.mock(Server.class);
when(mockServer.getConfiguration()).thenReturn(TEST_UTIL.getConfiguration());
PairOfSameType<Region> daughters = st.execute(mockServer, null);
// Do some assertions about execution.
assertTrue(this.fs.exists(this.parent.getRegionFileSystem().getSplitsDir()));
// Assert the parent region is closed.
assertTrue(this.parent.isClosed());
// Assert splitdir is empty -- because its content will have been moved out
// to be under the daughter region dirs.
assertEquals(0, this.fs.listStatus(this.parent.getRegionFileSystem().getSplitsDir()).length);
// Check daughters have correct key span.
assertTrue(
Bytes.equals(
parent.getRegionInfo().getStartKey(),
daughters.getFirst().getRegionInfo().getStartKey()));
assertTrue(Bytes.equals(GOOD_SPLIT_ROW, daughters.getFirst().getRegionInfo().getEndKey()));
assertTrue(Bytes.equals(daughters.getSecond().getRegionInfo().getStartKey(), GOOD_SPLIT_ROW));
assertTrue(
Bytes.equals(
parent.getRegionInfo().getEndKey(), daughters.getSecond().getRegionInfo().getEndKey()));
// Count rows. daughters are already open
int daughtersRowCount = 0;
for (Region openRegion : daughters) {
try {
int count = TEST_UTIL.countRows(openRegion);
assertTrue(count > 0 && count != rowcount);
daughtersRowCount += count;
} finally {
HBaseTestingUtility.closeRegionAndWAL(openRegion);
}
}
assertEquals(rowcount, daughtersRowCount);
// Assert the write lock is no longer held on parent
assertTrue(!this.parent.lock.writeLock().isHeldByCurrentThread());
}
HRegion createRegion(final Path testdir, final WALFactory wals) throws IOException {
// Make a region with start and end keys. Use 'aaa', to 'AAA'. The load
// region utility will add rows between 'aaa' and 'zzz'.
HTableDescriptor htd = new HTableDescriptor(TableName.valueOf("table"));
HColumnDescriptor hcd = new HColumnDescriptor(CF);
htd.addFamily(hcd);
HRegionInfo hri = new HRegionInfo(htd.getTableName(), STARTROW, ENDROW);
HRegion r =
HBaseTestingUtility.createRegionAndWAL(hri, testdir, TEST_UTIL.getConfiguration(), htd);
HBaseTestingUtility.closeRegionAndWAL(r);
return HRegion.openHRegion(
testdir,
hri,
htd,
wals.getWAL(hri.getEncodedNameAsBytes(), hri.getTable().getNamespace()),
TEST_UTIL.getConfiguration());
}
