private Table createTableAndLoadData(
HMaster master, TableName tablename, int numRegions, int replication) throws Exception {
assertTrue("ROWSIZE must > numregions:" + numRegions, ROWSIZE > numRegions);
byte[][] splitRows = new byte[numRegions - 1][];
for (int i = 0; i < splitRows.length; i++) {
splitRows[i] = ROWS[(i + 1) * ROWSIZE / numRegions];
}
Table table = TEST_UTIL.createTable(tablename, FAMILYNAME, splitRows);
if (replication > 1) {
HBaseTestingUtility.setReplicas(admin, tablename, replication);
}
loadData(table);
verifyRowCount(table, ROWSIZE);
// sleep here is an ugly hack to allow region transitions to finish
long timeout = System.currentTimeMillis() + waitTime;
List<Pair<HRegionInfo, ServerName>> tableRegions;
while (System.currentTimeMillis() < timeout) {
tableRegions =
MetaTableAccessor.getTableRegionsAndLocations(master.getConnection(), tablename);
if (tableRegions.size() == numRegions * replication) break;
Thread.sleep(250);
}
tableRegions = MetaTableAccessor.getTableRegionsAndLocations(master.getConnection(), tablename);
LOG.info("Regions after load: " + Joiner.on(',').join(tableRegions));
assertEquals(numRegions * replication, tableRegions.size());
return table;
}
@Test
public void testMergeWithReplicas() throws Exception {
final TableName tableName = TableName.valueOf("testMergeWithReplicas");
// Create table and load data.
createTableAndLoadData(master, tableName, 5, 2);
List<Pair<HRegionInfo, ServerName>> initialRegionToServers =
MetaTableAccessor.getTableRegionsAndLocations(master.getConnection(), tableName);
// Merge 1st and 2nd region
PairOfSameType<HRegionInfo> mergedRegions =
mergeRegionsAndVerifyRegionNum(master, tableName, 0, 2, 5 * 2 - 2);
List<Pair<HRegionInfo, ServerName>> currentRegionToServers =
MetaTableAccessor.getTableRegionsAndLocations(master.getConnection(), tableName);
List<HRegionInfo> initialRegions = new ArrayList<HRegionInfo>();
for (Pair<HRegionInfo, ServerName> p : initialRegionToServers) {
initialRegions.add(p.getFirst());
}
List<HRegionInfo> currentRegions = new ArrayList<HRegionInfo>();
for (Pair<HRegionInfo, ServerName> p : currentRegionToServers) {
currentRegions.add(p.getFirst());
}
assertTrue(initialRegions.contains(mergedRegions.getFirst())); // this is the first region
assertTrue(
initialRegions.contains(
RegionReplicaUtil.getRegionInfoForReplica(
mergedRegions.getFirst(), 1))); // this is the replica of the first region
assertTrue(initialRegions.contains(mergedRegions.getSecond())); // this is the second region
assertTrue(
initialRegions.contains(
RegionReplicaUtil.getRegionInfoForReplica(
mergedRegions.getSecond(), 1))); // this is the replica of the second region
assertTrue(!initialRegions.contains(currentRegions.get(0))); // this is the new region
assertTrue(
!initialRegions.contains(
RegionReplicaUtil.getRegionInfoForReplica(
currentRegions.get(0), 1))); // replica of the new region
assertTrue(
currentRegions.contains(
RegionReplicaUtil.getRegionInfoForReplica(
currentRegions.get(0), 1))); // replica of the new region
assertTrue(
!currentRegions.contains(
RegionReplicaUtil.getRegionInfoForReplica(
mergedRegions.getFirst(), 1))); // replica of the merged region
assertTrue(
!currentRegions.contains(
RegionReplicaUtil.getRegionInfoForReplica(
mergedRegions.getSecond(), 1))); // replica of the merged region
}
private PairOfSameType<HRegionInfo> requestMergeRegion(
HMaster master, TableName tablename, int regionAnum, int regionBnum) throws Exception {
List<Pair<HRegionInfo, ServerName>> tableRegions =
MetaTableAccessor.getTableRegionsAndLocations(master.getConnection(), tablename);
HRegionInfo regionA = tableRegions.get(regionAnum).getFirst();
HRegionInfo regionB = tableRegions.get(regionBnum).getFirst();
TEST_UTIL
.getHBaseAdmin()
.mergeRegions(regionA.getEncodedNameAsBytes(), regionB.getEncodedNameAsBytes(), false);
return new PairOfSameType<HRegionInfo>(regionA, regionB);
}
private void waitAndVerifyRegionNum(HMaster master, TableName tablename, int expectedRegionNum)
throws Exception {
List<Pair<HRegionInfo, ServerName>> tableRegionsInMeta;
List<HRegionInfo> tableRegionsInMaster;
long timeout = System.currentTimeMillis() + waitTime;
while (System.currentTimeMillis() < timeout) {
tableRegionsInMeta =
MetaTableAccessor.getTableRegionsAndLocations(master.getConnection(), tablename);
tableRegionsInMaster =
master.getAssignmentManager().getRegionStates().getRegionsOfTable(tablename);
if (tableRegionsInMeta.size() == expectedRegionNum
&& tableRegionsInMaster.size() == expectedRegionNum) {
break;
}
Thread.sleep(250);
}
tableRegionsInMeta =
MetaTableAccessor.getTableRegionsAndLocations(master.getConnection(), tablename);
LOG.info("Regions after merge:" + Joiner.on(',').join(tableRegionsInMeta));
assertEquals(expectedRegionNum, tableRegionsInMeta.size());
}
@SuppressWarnings("deprecation")
@Test
public void testCleanMergeReference() throws Exception {
LOG.info("Starting testCleanMergeReference");
admin.enableCatalogJanitor(false);
try {
final TableName tableName = TableName.valueOf("testCleanMergeReference");
// Create table and load data.
Table table = createTableAndLoadData(master, tableName);
// Merge 1st and 2nd region
mergeRegionsAndVerifyRegionNum(master, tableName, 0, 1, INITIAL_REGION_NUM - 1);
verifyRowCount(table, ROWSIZE);
table.close();
List<Pair<HRegionInfo, ServerName>> tableRegions =
MetaTableAccessor.getTableRegionsAndLocations(master.getConnection(), tableName);
HRegionInfo mergedRegionInfo = tableRegions.get(0).getFirst();
HTableDescriptor tableDescritor = master.getTableDescriptors().get(tableName);
Result mergedRegionResult =
MetaTableAccessor.getRegionResult(
master.getConnection(), mergedRegionInfo.getRegionName());
// contains merge reference in META
assertTrue(
mergedRegionResult.getValue(HConstants.CATALOG_FAMILY, HConstants.MERGEA_QUALIFIER)
!= null);
assertTrue(
mergedRegionResult.getValue(HConstants.CATALOG_FAMILY, HConstants.MERGEB_QUALIFIER)
!= null);
// merging regions' directory are in the file system all the same
PairOfSameType<HRegionInfo> p = MetaTableAccessor.getMergeRegions(mergedRegionResult);
HRegionInfo regionA = p.getFirst();
HRegionInfo regionB = p.getSecond();
FileSystem fs = master.getMasterFileSystem().getFileSystem();
Path rootDir = master.getMasterFileSystem().getRootDir();
Path tabledir = FSUtils.getTableDir(rootDir, mergedRegionInfo.getTable());
Path regionAdir = new Path(tabledir, regionA.getEncodedName());
Path regionBdir = new Path(tabledir, regionB.getEncodedName());
assertTrue(fs.exists(regionAdir));
assertTrue(fs.exists(regionBdir));
admin.compactRegion(mergedRegionInfo.getRegionName());
// wait until merged region doesn't have reference file
long timeout = System.currentTimeMillis() + waitTime;
HRegionFileSystem hrfs =
new HRegionFileSystem(TEST_UTIL.getConfiguration(), fs, tabledir, mergedRegionInfo);
while (System.currentTimeMillis() < timeout) {
if (!hrfs.hasReferences(tableDescritor)) {
break;
}
Thread.sleep(50);
}
assertFalse(hrfs.hasReferences(tableDescritor));
// run CatalogJanitor to clean merge references in hbase:meta and archive the
// files of merging regions
int cleaned = admin.runCatalogScan();
assertTrue(cleaned > 0);
assertFalse(fs.exists(regionAdir));
assertFalse(fs.exists(regionBdir));
mergedRegionResult =
MetaTableAccessor.getRegionResult(
master.getConnection(), mergedRegionInfo.getRegionName());
assertFalse(
mergedRegionResult.getValue(HConstants.CATALOG_FAMILY, HConstants.MERGEA_QUALIFIER)
!= null);
assertFalse(
mergedRegionResult.getValue(HConstants.CATALOG_FAMILY, HConstants.MERGEB_QUALIFIER)
!= null);
} finally {
admin.enableCatalogJanitor(true);
}
}