@Test
public void testSnapshotStateAfterMerge() throws Exception {
int numRows = DEFAULT_NUM_ROWS;
// make sure we don't fail on listing snapshots
SnapshotTestingUtils.assertNoSnapshots(admin);
// load the table so we have some data
SnapshotTestingUtils.loadData(UTIL, TABLE_NAME, numRows, TEST_FAM);
// Take a snapshot
String snapshotBeforeMergeName = "snapshotBeforeMerge";
admin.snapshot(snapshotBeforeMergeName, TABLE_NAME, SnapshotType.FLUSH);
// Clone the table
TableName cloneBeforeMergeName = TableName.valueOf("cloneBeforeMerge");
admin.cloneSnapshot(snapshotBeforeMergeName, cloneBeforeMergeName);
SnapshotTestingUtils.waitForTableToBeOnline(UTIL, cloneBeforeMergeName);
// Merge two regions
List<HRegionInfo> regions = admin.getTableRegions(TABLE_NAME);
Collections.sort(
regions,
new Comparator<HRegionInfo>() {
public int compare(HRegionInfo r1, HRegionInfo r2) {
return Bytes.compareTo(r1.getStartKey(), r2.getStartKey());
}
});
int numRegions = admin.getTableRegions(TABLE_NAME).size();
int numRegionsAfterMerge = numRegions - 2;
admin.mergeRegionsAsync(
regions.get(1).getEncodedNameAsBytes(), regions.get(2).getEncodedNameAsBytes(), true);
admin.mergeRegionsAsync(
regions.get(4).getEncodedNameAsBytes(), regions.get(5).getEncodedNameAsBytes(), true);
// Verify that there's one region less
waitRegionsAfterMerge(numRegionsAfterMerge);
assertEquals(numRegionsAfterMerge, admin.getTableRegions(TABLE_NAME).size());
// Clone the table
TableName cloneAfterMergeName = TableName.valueOf("cloneAfterMerge");
admin.cloneSnapshot(snapshotBeforeMergeName, cloneAfterMergeName);
SnapshotTestingUtils.waitForTableToBeOnline(UTIL, cloneAfterMergeName);
verifyRowCount(UTIL, TABLE_NAME, numRows);
verifyRowCount(UTIL, cloneBeforeMergeName, numRows);
verifyRowCount(UTIL, cloneAfterMergeName, numRows);
// test that we can delete the snapshot
UTIL.deleteTable(cloneAfterMergeName);
UTIL.deleteTable(cloneBeforeMergeName);
}