// Read out the TabletLocationStates
MockCurrentState state = new MockCurrentState(new MergeInfo(new KeyExtent(tableId, new Text("p"), new Text("e")), MergeInfo.Operation.MERGE));
TCredentials auths = CredentialHelper.create("root", new PasswordToken(new byte[0]), "instance");
// Verify the tablet state: hosted, and count
MetaDataStateStore metaDataStateStore = new MetaDataStateStore(instance, auths, state);
int count = 0;
for (TabletLocationState tss : metaDataStateStore) {
Assert.assertEquals(TabletState.HOSTED, tss.getState(state.onlineTabletServers()));
count++;
}
Assert.assertEquals(splits.length + 1, count);
// Create the hole
// Split the tablet at one end of the range
Mutation m = new KeyExtent(tableId, new Text("t"), new Text("p")).getPrevRowUpdateMutation();
Constants.METADATA_SPLIT_RATIO_COLUMN.put(m, new Value("0.5".getBytes()));
Constants.METADATA_OLD_PREV_ROW_COLUMN.put(m, KeyExtent.encodePrevEndRow(new Text("o")));
update(connector, m);
// do the state check
MergeStats stats = scan(state, metaDataStateStore);
MergeState newState = stats.nextMergeState(connector, state);
Assert.assertEquals(MergeState.WAITING_FOR_OFFLINE, newState);
// unassign the tablets
BatchDeleter deleter = connector.createBatchDeleter("!METADATA", Constants.NO_AUTHS, 1000, new BatchWriterConfig());
deleter.fetchColumnFamily(Constants.METADATA_CURRENT_LOCATION_COLUMN_FAMILY);
deleter.setRanges(Collections.singletonList(new Range()));
deleter.delete();
// now we should be ready to merge but, we have an inconsistent !METADATA table
stats = scan(state, metaDataStateStore);
Assert.assertEquals(MergeState.WAITING_FOR_OFFLINE, stats.nextMergeState(connector, state));
// finish the split
KeyExtent tablet = new KeyExtent(tableId, new Text("p"), new Text("o"));
m = tablet.getPrevRowUpdateMutation();
Constants.METADATA_SPLIT_RATIO_COLUMN.put(m, new Value("0.5".getBytes()));
update(connector, m);
metaDataStateStore.setLocations(Collections.singletonList(new Assignment(tablet, state.someTServer)));
// onos... there's a new tablet online
stats = scan(state, metaDataStateStore);
Assert.assertEquals(MergeState.WAITING_FOR_CHOPPED, stats.nextMergeState(connector, state));
// chop it
m = tablet.getPrevRowUpdateMutation();
Constants.METADATA_CHOPPED_COLUMN.put(m, new Value("junk".getBytes()));
update(connector, m);
stats = scan(state, metaDataStateStore);
Assert.assertEquals(MergeState.WAITING_FOR_OFFLINE, stats.nextMergeState(connector, state));
// take it offline
m = tablet.getPrevRowUpdateMutation();
Collection<Collection<String>> walogs = Collections.emptyList();
metaDataStateStore.unassign(Collections.singletonList(new TabletLocationState(tablet, null, state.someTServer, null, walogs, false)));
// now we can split
stats = scan(state, metaDataStateStore);
Assert.assertEquals(MergeState.MERGING, stats.nextMergeState(connector, state));