http://git-wip-us.apache.org/repos/asf/hbase-site/blob/65565d77/devapidocs/src-html/org/apache/hadoop/hbase/MetaTableAccessor.CollectAllVisitor.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/MetaTableAccessor.CollectAllVisitor.html b/devapidocs/src-html/org/apache/hadoop/hbase/MetaTableAccessor.CollectAllVisitor.html index fea2b5a..c7a6cc4 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/MetaTableAccessor.CollectAllVisitor.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/MetaTableAccessor.CollectAllVisitor.html @@ -1354,816 +1354,824 @@ <span class="sourceLineNo">1346</span> */<a name="line.1346"></a> <span class="sourceLineNo">1347</span> public static void putsToMetaTable(final Connection connection, final List<Put> ps)<a name="line.1347"></a> <span class="sourceLineNo">1348</span> throws IOException {<a name="line.1348"></a> -<span class="sourceLineNo">1349</span> try (Table t = getMetaHTable(connection)) {<a name="line.1349"></a> -<span class="sourceLineNo">1350</span> debugLogMutations(ps);<a name="line.1350"></a> -<span class="sourceLineNo">1351</span> t.put(ps);<a name="line.1351"></a> -<span class="sourceLineNo">1352</span> }<a name="line.1352"></a> -<span class="sourceLineNo">1353</span> }<a name="line.1353"></a> -<span class="sourceLineNo">1354</span><a name="line.1354"></a> -<span class="sourceLineNo">1355</span> /**<a name="line.1355"></a> -<span class="sourceLineNo">1356</span> * Delete the passed <code>d</code> from the <code>hbase:meta</code> table.<a name="line.1356"></a> -<span class="sourceLineNo">1357</span> * @param connection connection we're using<a name="line.1357"></a> -<span class="sourceLineNo">1358</span> * @param d Delete to add to hbase:meta<a name="line.1358"></a> -<span class="sourceLineNo">1359</span> */<a name="line.1359"></a> -<span class="sourceLineNo">1360</span> private static void deleteFromMetaTable(final Connection connection, final Delete d)<a name="line.1360"></a> -<span class="sourceLineNo">1361</span> throws IOException {<a name="line.1361"></a> -<span class="sourceLineNo">1362</span> List<Delete> dels = new ArrayList<>(1);<a name="line.1362"></a> -<span class="sourceLineNo">1363</span> dels.add(d);<a name="line.1363"></a> -<span class="sourceLineNo">1364</span> deleteFromMetaTable(connection, dels);<a name="line.1364"></a> -<span class="sourceLineNo">1365</span> }<a name="line.1365"></a> -<span class="sourceLineNo">1366</span><a name="line.1366"></a> -<span class="sourceLineNo">1367</span> /**<a name="line.1367"></a> -<span class="sourceLineNo">1368</span> * Delete the passed <code>deletes</code> from the <code>hbase:meta</code> table.<a name="line.1368"></a> -<span class="sourceLineNo">1369</span> * @param connection connection we're using<a name="line.1369"></a> -<span class="sourceLineNo">1370</span> * @param deletes Deletes to add to hbase:meta This list should support #remove.<a 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name="line.1353"></a> +<span class="sourceLineNo">1354</span> // the implementation for putting a single Put is much simpler so here we do a check first.<a name="line.1354"></a> +<span class="sourceLineNo">1355</span> if (ps.size() == 1) {<a name="line.1355"></a> +<span class="sourceLineNo">1356</span> t.put(ps.get(0));<a name="line.1356"></a> +<span class="sourceLineNo">1357</span> } else {<a name="line.1357"></a> +<span class="sourceLineNo">1358</span> t.put(ps);<a name="line.1358"></a> +<span class="sourceLineNo">1359</span> }<a name="line.1359"></a> +<span class="sourceLineNo">1360</span> }<a name="line.1360"></a> +<span class="sourceLineNo">1361</span> }<a name="line.1361"></a> +<span class="sourceLineNo">1362</span><a name="line.1362"></a> +<span class="sourceLineNo">1363</span> /**<a name="line.1363"></a> +<span class="sourceLineNo">1364</span> * Delete the passed <code>d</code> from the <code>hbase:meta</code> table.<a name="line.1364"></a> +<span class="sourceLineNo">1365</span> * @param connection connection we're using<a name="line.1365"></a> +<span class="sourceLineNo">1366</span> * @param d Delete to add to hbase:meta<a name="line.1366"></a> +<span class="sourceLineNo">1367</span> */<a name="line.1367"></a> +<span class="sourceLineNo">1368</span> private static void deleteFromMetaTable(final Connection connection, final Delete d)<a name="line.1368"></a> +<span class="sourceLineNo">1369</span> throws IOException {<a name="line.1369"></a> +<span class="sourceLineNo">1370</span> List<Delete> dels = new ArrayList<>(1);<a name="line.1370"></a> +<span class="sourceLineNo">1371</span> dels.add(d);<a name="line.1371"></a> +<span class="sourceLineNo">1372</span> deleteFromMetaTable(connection, dels);<a name="line.1372"></a> +<span class="sourceLineNo">1373</span> }<a name="line.1373"></a> +<span class="sourceLineNo">1374</span><a name="line.1374"></a> +<span class="sourceLineNo">1375</span> /**<a name="line.1375"></a> +<span class="sourceLineNo">1376</span> * Delete the passed <code>deletes</code> from the <code>hbase:meta</code> table.<a name="line.1376"></a> +<span class="sourceLineNo">1377</span> * @param connection connection we're using<a name="line.1377"></a> +<span class="sourceLineNo">1378</span> * @param deletes Deletes to add to hbase:meta This list should support #remove.<a name="line.1378"></a> +<span class="sourceLineNo">1379</span> */<a name="line.1379"></a> +<span class="sourceLineNo">1380</span> private static void deleteFromMetaTable(final Connection connection, final List<Delete> deletes)<a name="line.1380"></a> +<span class="sourceLineNo">1381</span> throws IOException {<a name="line.1381"></a> +<span class="sourceLineNo">1382</span> try (Table t = getMetaHTable(connection)) {<a name="line.1382"></a> +<span class="sourceLineNo">1383</span> debugLogMutations(deletes);<a name="line.1383"></a> +<span class="sourceLineNo">1384</span> t.delete(deletes);<a name="line.1384"></a> +<span class="sourceLineNo">1385</span> }<a name="line.1385"></a> +<span class="sourceLineNo">1386</span> }<a name="line.1386"></a> +<span class="sourceLineNo">1387</span><a name="line.1387"></a> +<span class="sourceLineNo">1388</span> /**<a name="line.1388"></a> +<span class="sourceLineNo">1389</span> * Deletes some replica columns corresponding to replicas for the passed rows<a name="line.1389"></a> +<span class="sourceLineNo">1390</span> * @param metaRows rows in hbase:meta<a name="line.1390"></a> +<span class="sourceLineNo">1391</span> * @param replicaIndexToDeleteFrom the replica ID we would start deleting from<a name="line.1391"></a> +<span class="sourceLineNo">1392</span> * @param numReplicasToRemove how many replicas to remove<a name="line.1392"></a> +<span class="sourceLineNo">1393</span> * @param connection connection we're using to access meta table<a name="line.1393"></a> +<span class="sourceLineNo">1394</span> */<a name="line.1394"></a> +<span class="sourceLineNo">1395</span> public static void removeRegionReplicasFromMeta(Set<byte[]> metaRows,<a name="line.1395"></a> +<span class="sourceLineNo">1396</span> int replicaIndexToDeleteFrom, int numReplicasToRemove, Connection connection)<a name="line.1396"></a> +<span class="sourceLineNo">1397</span> throws IOException {<a name="line.1397"></a> +<span class="sourceLineNo">1398</span> int absoluteIndex = replicaIndexToDeleteFrom + numReplicasToRemove;<a name="line.1398"></a> +<span class="sourceLineNo">1399</span> for (byte[] row : metaRows) {<a name="line.1399"></a> +<span class="sourceLineNo">1400</span> long now = EnvironmentEdgeManager.currentTime();<a name="line.1400"></a> +<span class="sourceLineNo">1401</span> Delete deleteReplicaLocations = new Delete(row);<a name="line.1401"></a> +<span class="sourceLineNo">1402</span> for (int i = replicaIndexToDeleteFrom; i < absoluteIndex; i++) {<a name="line.1402"></a> +<span class="sourceLineNo">1403</span> deleteReplicaLocations.addColumns(getCatalogFamily(),<a name="line.1403"></a> +<span class="sourceLineNo">1404</span> getServerColumn(i), now);<a name="line.1404"></a> +<span class="sourceLineNo">1405</span> deleteReplicaLocations.addColumns(getCatalogFamily(),<a name="line.1405"></a> +<span class="sourceLineNo">1406</span> getSeqNumColumn(i), now);<a name="line.1406"></a> +<span class="sourceLineNo">1407</span> deleteReplicaLocations.addColumns(getCatalogFamily(),<a name="line.1407"></a> +<span class="sourceLineNo">1408</span> getStartCodeColumn(i), now);<a name="line.1408"></a> +<span class="sourceLineNo">1409</span> }<a name="line.1409"></a> +<span class="sourceLineNo">1410</span> deleteFromMetaTable(connection, deleteReplicaLocations);<a name="line.1410"></a> +<span class="sourceLineNo">1411</span> }<a name="line.1411"></a> +<span class="sourceLineNo">1412</span> }<a name="line.1412"></a> +<span class="sourceLineNo">1413</span><a name="line.1413"></a> +<span class="sourceLineNo">1414</span> /**<a name="line.1414"></a> +<span class="sourceLineNo">1415</span> * Execute the passed <code>mutations</code> against <code>hbase:meta</code> table.<a name="line.1415"></a> +<span class="sourceLineNo">1416</span> * @param connection connection we're using<a name="line.1416"></a> +<span class="sourceLineNo">1417</span> * @param mutations Puts and Deletes to execute on hbase:meta<a name="line.1417"></a> +<span class="sourceLineNo">1418</span> * @throws IOException<a name="line.1418"></a> +<span class="sourceLineNo">1419</span> */<a name="line.1419"></a> +<span class="sourceLineNo">1420</span> public static void mutateMetaTable(final Connection connection,<a name="line.1420"></a> +<span class="sourceLineNo">1421</span> final List<Mutation> mutations)<a name="line.1421"></a> +<span class="sourceLineNo">1422</span> throws IOException {<a name="line.1422"></a> +<span class="sourceLineNo">1423</span> Table t = getMetaHTable(connection);<a name="line.1423"></a> +<span class="sourceLineNo">1424</span> try {<a name="line.1424"></a> +<span class="sourceLineNo">1425</span> debugLogMutations(mutations);<a name="line.1425"></a> +<span class="sourceLineNo">1426</span> t.batch(mutations, null);<a name="line.1426"></a> +<span class="sourceLineNo">1427</span> } catch (InterruptedException e) {<a name="line.1427"></a> +<span class="sourceLineNo">1428</span> InterruptedIOException ie = new InterruptedIOException(e.getMessage());<a name="line.1428"></a> +<span class="sourceLineNo">1429</span> ie.initCause(e);<a name="line.1429"></a> +<span class="sourceLineNo">1430</span> throw ie;<a name="line.1430"></a> +<span class="sourceLineNo">1431</span> } finally {<a name="line.1431"></a> +<span class="sourceLineNo">1432</span> t.close();<a name="line.1432"></a> +<span class="sourceLineNo">1433</span> }<a name="line.1433"></a> +<span class="sourceLineNo">1434</span> }<a name="line.1434"></a> +<span class="sourceLineNo">1435</span><a name="line.1435"></a> +<span class="sourceLineNo">1436</span> private static void addRegionStateToPut(Put put, RegionState.State state) throws IOException {<a name="line.1436"></a> +<span class="sourceLineNo">1437</span> put.add(CellBuilderFactory.create(CellBuilderType.SHALLOW_COPY)<a name="line.1437"></a> +<span class="sourceLineNo">1438</span> .setRow(put.getRow())<a name="line.1438"></a> +<span class="sourceLineNo">1439</span> .setFamily(HConstants.CATALOG_FAMILY)<a name="line.1439"></a> +<span class="sourceLineNo">1440</span> .setQualifier(getRegionStateColumn())<a name="line.1440"></a> +<span class="sourceLineNo">1441</span> .setTimestamp(put.getTimestamp())<a name="line.1441"></a> +<span class="sourceLineNo">1442</span> .setType(Cell.Type.Put)<a name="line.1442"></a> +<span class="sourceLineNo">1443</span> .setValue(Bytes.toBytes(state.name()))<a name="line.1443"></a> +<span class="sourceLineNo">1444</span> .build());<a name="line.1444"></a> +<span class="sourceLineNo">1445</span> }<a name="line.1445"></a> +<span class="sourceLineNo">1446</span><a name="line.1446"></a> +<span class="sourceLineNo">1447</span> /**<a name="line.1447"></a> +<span class="sourceLineNo">1448</span> * Adds daughter region infos to hbase:meta row for the specified region. Note that this does not<a name="line.1448"></a> +<span class="sourceLineNo">1449</span> * add its daughter's as different rows, but adds information about the daughters in the same row<a name="line.1449"></a> +<span class="sourceLineNo">1450</span> * as the parent. 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Note that this<a name="line.1474"></a> +<span class="sourceLineNo">1475</span> * does not add its daughter's as different rows, but adds information about the daughters<a name="line.1475"></a> +<span class="sourceLineNo">1476</span> * in the same row as the parent. 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Initial state for new regions<a name="line.1490"></a> +<span class="sourceLineNo">1491</span> * is CLOSED.<a name="line.1491"></a> +<span class="sourceLineNo">1492</span> * @param connection connection we're using<a name="line.1492"></a> +<span class="sourceLineNo">1493</span> * @param regionInfos region information list<a name="line.1493"></a> +<span class="sourceLineNo">1494</span> * @throws IOException if problem connecting or updating meta<a name="line.1494"></a> +<span class="sourceLineNo">1495</span> */<a name="line.1495"></a> +<span class="sourceLineNo">1496</span> public static void addRegionsToMeta(Connection connection, List<RegionInfo> regionInfos,<a name="line.1496"></a> +<span class="sourceLineNo">1497</span> int regionReplication) throws IOException {<a name="line.1497"></a> +<span class="sourceLineNo">1498</span> addRegionsToMeta(connection, regionInfos, regionReplication,<a name="line.1498"></a> +<span class="sourceLineNo">1499</span> EnvironmentEdgeManager.currentTime());<a name="line.1499"></a> +<span class="sourceLineNo">1500</span> }<a name="line.1500"></a> +<span class="sourceLineNo">1501</span><a name="line.1501"></a> +<span class="sourceLineNo">1502</span> /**<a name="line.1502"></a> +<span class="sourceLineNo">1503</span> * Adds a hbase:meta row for each of the specified new regions. Initial state for new regions<a name="line.1503"></a> +<span class="sourceLineNo">1504</span> * is CLOSED.<a name="line.1504"></a> +<span class="sourceLineNo">1505</span> * @param connection connection we're using<a name="line.1505"></a> +<span class="sourceLineNo">1506</span> * @param regionInfos region information list<a name="line.1506"></a> +<span class="sourceLineNo">1507</span> * @param regionReplication<a name="line.1507"></a> +<span class="sourceLineNo">1508</span> * @param ts desired timestamp<a name="line.1508"></a> +<span class="sourceLineNo">1509</span> * @throws IOException if problem connecting or updating meta<a name="line.1509"></a> +<span class="sourceLineNo">1510</span> */<a name="line.1510"></a> +<span class="sourceLineNo">1511</span> private static void addRegionsToMeta(Connection connection, List<RegionInfo> regionInfos,<a name="line.1511"></a> +<span class="sourceLineNo">1512</span> int regionReplication, long ts) throws IOException {<a name="line.1512"></a> +<span class="sourceLineNo">1513</span> List<Put> puts = new ArrayList<>();<a name="line.1513"></a> +<span class="sourceLineNo">1514</span> for (RegionInfo regionInfo : regionInfos) {<a name="line.1514"></a> +<span class="sourceLineNo">1515</span> if (RegionReplicaUtil.isDefaultReplica(regionInfo)) {<a name="line.1515"></a> +<span class="sourceLineNo">1516</span> Put put = makePutFromRegionInfo(regionInfo, ts);<a name="line.1516"></a> +<span class="sourceLineNo">1517</span> // New regions are added with initial state of CLOSED.<a name="line.1517"></a> +<span class="sourceLineNo">1518</span> addRegionStateToPut(put, RegionState.State.CLOSED);<a name="line.1518"></a> +<span class="sourceLineNo">1519</span> // Add empty locations for region replicas so that number of replicas can be cached<a name="line.1519"></a> +<span class="sourceLineNo">1520</span> // whenever the primary region is looked up from meta<a name="line.1520"></a> +<span class="sourceLineNo">1521</span> for (int i = 1; i < regionReplication; i++) {<a name="line.1521"></a> +<span class="sourceLineNo">1522</span> addEmptyLocation(put, i);<a name="line.1522"></a> +<span class="sourceLineNo">1523</span> }<a name="line.1523"></a> +<span class="sourceLineNo">1524</span> puts.add(put);<a name="line.1524"></a> +<span class="sourceLineNo">1525</span> }<a name="line.1525"></a> +<span class="sourceLineNo">1526</span> }<a name="line.1526"></a> +<span class="sourceLineNo">1527</span> putsToMetaTable(connection, puts);<a name="line.1527"></a> +<span class="sourceLineNo">1528</span> LOG.info("Added {} regions to meta.", puts.size());<a name="line.1528"></a> +<span class="sourceLineNo">1529</span> }<a name="line.1529"></a> +<span class="sourceLineNo">1530</span><a name="line.1530"></a> +<span class="sourceLineNo">1531</span> /**<a name="line.1531"></a> +<span class="sourceLineNo">1532</span> * Merge the two regions into one in an atomic operation. Deletes the two merging regions in<a name="line.1532"></a> +<span class="sourceLineNo">1533</span> * hbase:meta and adds the merged region with the information of two merging regions.<a name="line.1533"></a> +<span class="sourceLineNo">1534</span> * @param connection connection we're using<a name="line.1534"></a> +<span class="sourceLineNo">1535</span> * @param mergedRegion the merged region<a name="line.1535"></a> +<span class="sourceLineNo">1536</span> * @param regionA merge parent region A<a name="line.1536"></a> +<span class="sourceLineNo">1537</span> * @param regionAOpenSeqNum the next open sequence id for region A, used by serial replication. -1<a name="line.1537"></a> +<span class="sourceLineNo">1538</span> * if not necessary.<a name="line.1538"></a> +<span class="sourceLineNo">1539</span> * @param regionB merge parent region B<a name="line.1539"></a> +<span class="sourceLineNo">1540</span> * @param regionBOpenSeqNum the next open sequence id for region B, used by serial replication. -1<a name="line.1540"></a> +<span class="sourceLineNo">1541</span> * if not necessary.<a name="line.1541"></a> +<span class="sourceLineNo">1542</span> * @param sn the location of the region<a name="line.1542"></a> +<span class="sourceLineNo">1543</span> */<a name="line.1543"></a> +<span class="sourceLineNo">1544</span> public static void mergeRegions(Connection connection, RegionInfo mergedRegion,<a name="line.1544"></a> +<span class="sourceLineNo">1545</span> RegionInfo regionA, long regionAOpenSeqNum, RegionInfo regionB, long regionBOpenSeqNum,<a name="line.1545"></a> +<span class="sourceLineNo">1546</span> ServerName sn, int regionReplication) throws IOException {<a name="line.1546"></a> +<span class="sourceLineNo">1547</span> try (Table meta = getMetaHTable(connection)) {<a name="line.1547"></a> +<span class="sourceLineNo">1548</span> long time = EnvironmentEdgeManager.currentTime();<a name="line.1548"></a> +<span class="sourceLineNo">1549</span> List<Mutation> mutations = new ArrayList<>();<a name="line.1549"></a> +<span class="sourceLineNo">1550</span><a name="line.1550"></a> +<span class="sourceLineNo">1551</span> List<RegionInfo> replicationParents = new ArrayList<>(2);<a name="line.1551"></a> +<span class="sourceLineNo">1552</span> // Deletes for merging regions<a name="line.1552"></a> +<span class="sourceLineNo">1553</span> mutations.add(makeDeleteFromRegionInfo(regionA, time));<a name="line.1553"></a> +<span class="sourceLineNo">1554</span> if (regionAOpenSeqNum > 0) {<a name="line.1554"></a> +<span class="sourceLineNo">1555</span> mutations.add(makePutForReplicationBarrier(regionA, regionAOpenSeqNum, time));<a name="line.1555"></a> +<span class="sourceLineNo">1556</span> replicationParents.add(regionA);<a name="line.1556"></a> +<span class="sourceLineNo">1557</span> }<a name="line.1557"></a> +<span class="sourceLineNo">1558</span> mutations.add(makeDeleteFromRegionInfo(regionB, time));<a name="line.1558"></a> +<span class="sourceLineNo">1559</span> if (regionBOpenSeqNum > 0) {<a name="line.1559"></a> +<span class="sourceLineNo">1560</span> mutations.add(makePutForReplicationBarrier(regionB, regionBOpenSeqNum, time));<a name="line.1560"></a> +<span class="sourceLineNo">1561</span> replicationParents.add(regionB);<a name="line.1561"></a> +<span class="sourceLineNo">1562</span> }<a name="line.1562"></a> +<span class="sourceLineNo">1563</span><a name="line.1563"></a> +<span class="sourceLineNo">1564</span> // Put for parent<a name="line.1564"></a> +<span class="sourceLineNo">1565</span> Put putOfMerged = makePutFromRegionInfo(mergedRegion, time);<a name="line.1565"></a> +<span class="sourceLineNo">1566</span> putOfMerged.add(CellBuilderFactory.create(CellBuilderType.SHALLOW_COPY)<a name="line.1566"></a> <span class="sourceLineNo">1567</span> .setRow(putOfMerged.getRow())<a name="line.1567"></a> <span class="sourceLineNo">1568</span> .setFamily(HConstants.CATALOG_FAMILY)<a name="line.1568"></a> -<span class="sourceLineNo">1569</span> .setQualifier(HConstants.MERGEB_QUALIFIER)<a name="line.1569"></a> +<span class="sourceLineNo">1569</span> .setQualifier(HConstants.MERGEA_QUALIFIER)<a name="line.1569"></a> <span class="sourceLineNo">1570</span> .setTimestamp(putOfMerged.getTimestamp())<a name="line.1570"></a> <span class="sourceLineNo">1571</span> .setType(Type.Put)<a name="line.1571"></a> -<span class="sourceLineNo">1572</span> .setValue(RegionInfo.toByteArray(regionB))<a name="line.1572"></a> -<span class="sourceLineNo">1573</span> .build());<a name="line.1573"></a> -<span class="sourceLineNo">1574</span> // Set initial state to CLOSED<a name="line.1574"></a> -<span class="sourceLineNo">1575</span> // NOTE: If initial state is not set to CLOSED then merged region gets added with the<a name="line.1575"></a> -<span class="sourceLineNo">1576</span> // default OFFLINE state. If Master gets restarted after this step, start up sequence of<a name="line.1576"></a> -<span class="sourceLineNo">1577</span> // master tries to assign this offline region. This is followed by re-assignments of the<a name="line.1577"></a> -<span class="sourceLineNo">1578</span> // merged region from resumed {@link MergeTableRegionsProcedure}<a name="line.1578"></a> -<span class="sourceLineNo">1579</span> addRegionStateToPut(putOfMerged, RegionState.State.CLOSED);<a name="line.1579"></a> -<span class="sourceLineNo">1580</span> mutations.add(putOfMerged);<a name="line.1580"></a> -<span class="sourceLineNo">1581</span> // The merged is a new region, openSeqNum = 1 is fine. ServerName may be null<a name="line.1581"></a> -<span class="sourceLineNo">1582</span> // if crash after merge happened but before we got to here.. means in-memory<a name="line.1582"></a> -<span class="sourceLineNo">1583</span> // locations of offlined merged, now-closed, regions is lost. Should be ok. We<a name="line.1583"></a> -<span class="sourceLineNo">1584</span> // assign the merged region later.<a name="line.1584"></a> -<span class="sourceLineNo">1585</span> if (sn != null) {<a name="line.1585"></a> -<span class="sourceLineNo">1586</span> addLocation(putOfMerged, sn, 1, mergedRegion.getReplicaId());<a name="line.1586"></a> -<span class="sourceLineNo">1587</span> }<a name="line.1587"></a> -<span class="sourceLineNo">1588</span><a name="line.1588"></a> -<span class="sourceLineNo">1589</span> // Add empty locations for region replicas of the merged region so that number of replicas can<a name="line.1589"></a> -<span class="sourceLineNo">1590</span> // be cached whenever the primary region is looked up from meta<a name="line.1590"></a> -<span class="sourceLineNo">1591</span> for (int i = 1; i < regionReplication; i++) {<a name="line.1591"></a> -<span class="sourceLineNo">1592</span> addEmptyLocation(putOfMerged, i);<a name="line.1592"></a> -<span class="sourceLineNo">1593</span> }<a name="line.1593"></a> -<span class="sourceLineNo">1594</span> // add parent reference for serial replication<a name="line.1594"></a> -<span class="sourceLineNo">1595</span> if (!replicationParents.isEmpty()) {<a name="line.1595"></a> -<span class="sourceLineNo">1596</span> addReplicationParent(putOfMerged, replicationParents);<a name="line.1596"></a> -<span class="sourceLineNo">1597</span> }<a name="line.1597"></a> -<span class="sourceLineNo">1598</span> byte[] tableRow = Bytes.toBytes(mergedRegion.getRegionNameAsString() + HConstants.DELIMITER);<a name="line.1598"></a> -<span class="sourceLineNo">1599</span> multiMutate(connection, meta, tableRow, mutations);<a name="line.1599"></a> -<span class="sourceLineNo">1600</span> }<a name="line.1600"></a> -<span class="sourceLineNo">1601</span> }<a name="line.1601"></a> -<span class="sourceLineNo">1602</span><a name="line.1602"></a> -<span class="sourceLineNo">1603</span> /**<a name="line.1603"></a> -<span class="sourceLineNo">1604</span> * Splits the region into two in an atomic operation. Offlines the parent region with the<a name="line.1604"></a> -<span class="sourceLineNo">1605</span> * information that it is split into two, and also adds the daughter regions. Does not add the<a name="line.1605"></a> -<span class="sourceLineNo">1606</span> * location information to the daughter regions since they are not open yet.<a name="line.1606"></a> -<span class="sourceLineNo">1607</span> * @param connection connection we're using<a name="line.1607"></a> -<span class="sourceLineNo">1608</span> * @param parent the parent region which is split<a name="line.1608"></a> -<span class="sourceLineNo">1609</span> * @param parentOpenSeqNum the next open sequence id for parent region, used by serial<a name="line.1609"></a> -<span class="sourceLineNo">1610</span> * replication. -1 if not necessary.<a name="line.1610"></a> -<span class="sourceLineNo">1611</span> * @param splitA Split daughter region A<a name="line.1611"></a> -<span class="sourceLineNo">1612</span> * @param splitB Split daughter region B<a name="line.1612"></a> -<span class="sourceLineNo">1613</span> * @param sn the location of the region<a name="line.1613"></a> -<span class="sourceLineNo">1614</span> */<a name="line.1614"></a> -<span class="sourceLineNo">1615</span> public static void splitRegion(Connection connection, RegionInfo parent, long parentOpenSeqNum,<a name="line.1615"></a> -<span class="sourceLineNo">1616</span> RegionInfo splitA, RegionInfo splitB, ServerName sn, int regionReplication)<a name="line.1616"></a> -<span class="sourceLineNo">1617</span> throws IOException {<a name="line.1617"></a> -<span class="sourceLineNo">1618</span> try (Table meta = getMetaHTable(connection)) {<a name="line.1618"></a> -<span class="sourceLineNo">1619</span> long time = EnvironmentEdgeManager.currentTime();<a name="line.1619"></a> -<span class="sourceLineNo">1620</span> // Put for parent<a name="line.1620"></a> -<span class="sourceLineNo">1621</span> Put putParent = makePutFromRegionInfo(RegionInfoBuilder.newBuilder(parent)<a name="line.1621"></a> -<span class="sourceLineNo">1622</span> .setOffline(true)<a name="line.1622"></a> -<span class="sourceLineNo">1623</span> .setSplit(true).build(), time);<a name="line.1623"></a> -<span class="sourceLineNo">1624</span> addDaughtersToPut(putParent, splitA, splitB);<a name="line.1624"></a> -<span class="sourceLineNo">1625</span><a name="line.1625"></a> -<span class="sourceLineNo">1626</span> // Puts for daughters<a name="line.1626"></a> -<span class="sourceLineNo">1627</span> Put putA = makePutFromRegionInfo(splitA, time);<a name="line.1627"></a> -<span class="sourceLineNo">1628</span> Put putB = makePutFromRegionInfo(splitB, time);<a name="line.1628"></a> -<span class="sourceLineNo">1629</span> if (parentOpenSeqNum > 0) {<a name="line.1629"></a> -<span class="sourceLineNo">1630</span> addReplicationBarrier(putParent, parentOpenSeqNum);<a name="line.1630"></a> -<span class="sourceLineNo">1631</span> addReplicationParent(putA, Collections.singletonList(parent));<a name="line.1631"></a> -<span class="sourceLineNo">1632</span> addReplicationParent(putB, Collections.singletonList(parent));<a name="line.1632"></a> -<span class="sourceLineNo">1633</span> }<a name="line.1633"></a> -<span class="sourceLineNo">1634</span> // Set initial state to CLOSED<a name="line.1634"></a> -<span class="sourceLineNo">1635</span> // NOTE: If initial state is not set to CLOSED then daughter regions get added with the<a name="line.1635"></a> -<span class="sourceLineNo">1636</span> // default OFFLINE state. If Master gets restarted after this step, start up sequence of<a name="line.1636"></a> -<span class="sourceLineNo">1637</span> // master tries to assign these offline regions. This is followed by re-assignments of the<a name="line.1637"></a> -<span class="sourceLineNo">1638</span> // daughter regions from resumed {@link SplitTableRegionProcedure}<a name="line.1638"></a> -<span class="sourceLineNo">1639</span> addRegionStateToPut(putA, RegionState.State.CLOSED);<a name="line.1639"></a> -<span class="sourceLineNo">1640</span> addRegionStateToPut(putB, RegionState.State.CLOSED);<a name="line.1640"></a> -<span class="sourceLineNo">1641</span><a name="line.1641"></a> -<span class="sourceLineNo">1642</span> addSequenceNum(putA, 1, splitA.getReplicaId()); // new regions, openSeqNum = 1 is fine.<a name="line.1642"></a> -<span class="sourceLineNo">1643</span> addSequenceNum(putB, 1, splitB.getReplicaId());<a name="line.1643"></a> -<span class="sourceLineNo">1644</span><a name="line.1644"></a> -<span class="sourceLineNo">1645</span> // Add empty locations for region replicas of daughters so that number of replicas can be<a name="line.1645"></a> -<span class="sourceLineNo">1646</span> // cached whenever the primary region is looked up from meta<a name="line.1646"></a> -<span class="sourceLineNo">1647</span> for (int i = 1; i < regionReplication; i++) {<a name="line.1647"></a> -<span class="sourceLineNo">1648</span> addEmptyLocation(putA, i);<a name="line.1648"></a> -<span class="sourceLineNo">1649</span> addEmptyLocation(putB, i);<a name="line.1649"></a> -<span class="sourceLineNo">1650</span> }<a name="line.1650"></a> -<span class="sourceLineNo">1651</span><a name="line.1651"></a> -<span class="sourceLineNo">1652</span> byte[] tableRow = Bytes.toBytes(parent.getRegionNameAsString() + HConstants.DELIMITER);<a name="line.1652"></a> -<span class="sourceLineNo">1653</span> multiMutate(connection, meta, tableRow, putParent, putA, putB);<a name="line.1653"></a> -<span class="sourceLineNo">1654</span> }<a name="line.1654"></a> -<span class="sourceLineNo">1655</span> }<a name="line.1655"></a> -<span class="sourceLineNo">1656</span><a name="line.1656"></a> -<span class="sourceLineNo">1657</span> /**<a name="line.1657"></a> -<span class="sourceLineNo">1658</span> * Update state of the table in meta.<a name="line.1658"></a> -<span class="sourceLineNo">1659</span> * @param connection what we use for update<a name="line.1659"></a> -<span class="sourceLineNo">1660</span> * @param state new state<a name="line.1660"></a> -<span class="sourceLineNo">1661</span> */<a name="line.1661"></a> -<span class="sourceLineNo">1662</span> private static void updateTableState(Connection connection, TableState state) throws IOException {<a name="line.1662"></a> -<span class="sourceLineNo">1663</span> Put put = makePutFromTableState(state, EnvironmentEdgeManager.currentTime());<a name="line.1663"></a> -<span class="sourceLineNo">1664</span> putToMetaTable(connection, put);<a name="line.1664"></a> -<span class="sourceLineNo">1665</span> LOG.info("Updated {} in hbase:meta", state);<a name="line.1665"></a> -<span 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delete.addColumns(getTableFamily(), getTableStateColumn(), time);<a name="line.1687"></a> -<span class="sourceLineNo">1688</span> deleteFromMetaTable(connection, delete);<a name="line.1688"></a> -<span class="sourceLineNo">1689</span> LOG.info("Deleted table " + table + " state from META");<a name="line.1689"></a> -<span class="sourceLineNo">1690</span> }<a name="line.1690"></a> -<span class="sourceLineNo">1691</span><a name="line.1691"></a> -<span class="sourceLineNo">1692</span> private static void multiMutate(Connection connection, Table table, byte[] row,<a name="line.1692"></a> -<span class="sourceLineNo">1693</span> Mutation... mutations) throws IOException {<a name="line.1693"></a> -<span class="sourceLineNo">1694</span> multiMutate(connection, table, row, Arrays.asList(mutations));<a name="line.1694"></a> -<span class="sourceLineNo">1695</span> }<a name="line.1695"></a> -<span class="sourceLineNo">1696</span><a name="line.1696"></a> -<span class="sourceLineNo">1697</span> /**<a 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Default write timeout? 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Set the stub.<a name="line.1740"></a> -<span class="sourceLineNo">1741</span> protected void setStubByServiceName(ServerName serviceName/*Ignored*/) throws IOException {<a name="line.1741"></a> -<span class="sourceLineNo">1742</span> CoprocessorRpcChannel channel = table.coprocessorService(getRow());<a name="line.1742"></a> -<span class="sourceLineNo">1743</span> setStub(MultiRowMutationProtos.MultiRowMutationService.newBlockingStub(channel));<a name="line.1743"></a> -<span class="sourceLineNo">1744</span> }<a name="line.1744"></a> -<span class="sourceLineNo">1745</span> };<a name="line.1745"></a> -<span class="sourceLineNo">1746</span> int writeTimeout = connection.getConfiguration().getInt(HConstants.HBASE_RPC_WRITE_TIMEOUT_KEY,<a name="line.1746"></a> -<span class="sourceLineNo">1747</span> connection.getConfiguration().getInt(HConstants.HBASE_RPC_TIMEOUT_KEY,<a name="line.1747"></a> -<span class="sourceLineNo">1748</span> HConstants.DEFAULT_HBASE_RPC_TIMEOUT));<a name="line.1748"></a> -<span class="sourceLineNo">1749</span> // The region location should be cached in connection. Call prepare so this callable picks<a name="line.1749"></a> -<span class="sourceLineNo">1750</span> // up the region location (see super.prepare method).<a name="line.1750"></a> -<span class="sourceLineNo">1751</span> callable.prepare(false);<a name="line.1751"></a> -<span class="sourceLineNo">1752</span> callable.call(writeTimeout);<a name="line.1752"></a> -<span class="sourceLineNo">1753</span> }<a name="line.1753"></a> -<span class="sourceLineNo">1754</span><a name="line.1754"></a> -<span class="sourceLineNo">1755</span> /**<a name="line.1755"></a> -<span class="sourceLineNo">1756</span> * Updates the location of the specified region in hbase:meta to be the specified server hostname<a name="line.1756"></a> -<span class="sourceLineNo">1757</span> * and startcode.<a name="line.1757"></a> -<span class="sourceLineNo">1758</span> * <p><a name="line.1758"></a> -<span class="sourceLineNo">1759</span> * Uses passed catalog tracker to get a connection to the server hosting hbase:meta and 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connection connection we're using<a name="line.1778"></a> -<span class="sourceLineNo">1779</span> * @param regionInfo region to update location of<a name="line.1779"></a> -<span class="sourceLineNo">1780</span> * @param sn Server name<a name="line.1780"></a> -<span class="sourceLineNo">1781</span> * @param openSeqNum the latest sequence number obtained when the region was open<a name="line.1781"></a> -<span class="sourceLineNo">1782</span> * @param masterSystemTime wall clock time from master if passed in the open region RPC<a name="line.1782"></a> -<span class="sourceLineNo">1783</span> * @throws IOException In particular could throw {@link java.net.ConnectException} if the server<a name="line.1783"></a> -<span class="sourceLineNo">1784</span> * is down on other end.<a name="line.1784"></a> -<span class="sourceLineNo">1785</span> */<a name="line.1785"></a> -<span class="sourceLineNo">1786</span> private static void updateLocation(Connection connection, RegionInfo regionInfo, ServerName sn,<a name="line.1786"></a> -<span class="sourceLineNo">1787</span> long openSeqNum, long masterSystemTime) throws IOException {<a name="line.1787"></a> -<span class="sourceLineNo">1788</span> // region replicas are kept in the primary region's row<a name="line.1788"></a> -<span class="sourceLineNo">1789</span> Put put = new Put(getMetaKeyForRegion(regionInfo), masterSystemTime);<a name="line.1789"></a> -<span class="sourceLineNo">1790</span> addRegionInfo(put, regionInfo);<a name="line.1790"></a> -<span class="sourceLineNo">1791</span> addLocation(put, sn, openSeqNum, regionInfo.getReplicaId());<a name="line.1791"></a> -<span class="sourceLineNo">1792</span> putToMetaTable(connection, put);<a name="line.1792"></a> -<span class="sourceLineNo">1793</span> LOG.info("Updated row {} with server=", regionInfo.getRegionNameAsString(), sn);<a name="line.1793"></a> -<span class="sourceLineNo">1794</span> }<a name="line.1794"></a> -<span class="sourceLineNo">1795</span><a name="line.1795"></a> -<span class="sourceLineNo">1796</span> /**<a name="line.1796"></a> -<span class="sourceLineNo">1797</span> * Deletes the specified region from META.<a name="line.1797"></a> -<span class="sourceLineNo">1798</span> * @param connection connection we're using<a name="line.1798"></a> -<span class="sourceLineNo">1799</span> * @param regionInfo region to be deleted from META<a name="line.1799"></a> -<span class="sourceLineNo">1800</span> * @throws IOException<a name="line.1800"></a> -<span class="sourceLineNo">1801</span> */<a name="line.1801"></a> -<span class="sourceLineNo">1802</span> public static void deleteRegion(Connection connection, RegionInfo regionInfo) throws IOException {<a name="line.1802"></a> -<span class="sourceLineNo">1803</span> long time = EnvironmentEdgeManager.currentTime();<a name="line.1803"></a> -<span class="sourceLineNo">1804</span> Delete delete = new Delete(regionInfo.getRegionName());<a name="line.1804"></a> -<span class="sourceLineNo">1805</span> delete.addFamily(getCatalogFamily(), time);<a name="line.1805"></a> -<span class="sourceLineNo">1806</span> deleteFromMetaTable(connection, delete);<a name="line.1806"></a> -<span class="sourceLineNo">1807</span> LOG.info("Deleted " + regionInfo.getRegionNameAsString());<a name="line.1807"></a> -<span class="sourceLineNo">1808</span> }<a name="line.1808"></a> -<span class="sourceLineNo">1809</span><a name="line.1809"></a> -<span class="sourceLineNo">1810</span> /**<a name="line.1810"></a> -<span class="sourceLineNo">1811</span> * Deletes the specified regions from META.<a name="line.1811"></a> -<span class="sourceLineNo">1812</span> * @param connection connection we're using<a name="line.1812"></a> -<span class="sourceLineNo">1813</span> * @param regionsInfo list of regions to be deleted from META<a name="line.1813"></a> -<span class="sourceLineNo">1814</span> */<a name="line.1814"></a> -<span class="sourceLineNo">1815</span> public static void 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name="line.1824"></a> -<span class="sourceLineNo">1825</span> throws IOException {<a name="line.1825"></a> -<span class="sourceLineNo">1826</span> List<Delete> deletes = new ArrayList<>(regionsInfo.size());<a name="line.1826"></a> -<span class="sourceLineNo">1827</span> for (RegionInfo hri : regionsInfo) {<a name="line.1827"></a> -<span class="sourceLineNo">1828</span> Delete e = new Delete(hri.getRegionName());<a name="line.1828"></a> -<span class="sourceLineNo">1829</span> e.addFamily(getCatalogFamily(), ts);<a name="line.1829"></a> -<span class="sourceLineNo">1830</span> deletes.add(e);<a name="line.1830"></a> -<span class="sourceLineNo">1831</span> }<a name="line.1831"></a> -<span class="sourceLineNo">1832</span> deleteFromMetaTable(connection, deletes);<a name="line.1832"></a> -<span class="sourceLineNo">1833</span> LOG.info("Deleted {} regions from META", regionsInfo.size());<a name="line.1833"></a> -<span class="sourceLineNo">1834</span> LOG.debug("Deleted regions: {}", regionsInfo);<a name="line.1834"></a> -<span class="sourceLineNo">1835</span> }<a name="line.1835"></a> -<span class="sourceLineNo">1836</span><a name="line.1836"></a> -<span class="sourceLineNo">1837</span> /**<a name="line.1837"></a> -<span class="sourceLineNo">1838</span> * Overwrites the specified regions from hbase:meta. Deletes old rows for the given regions and<a name="line.1838"></a> -<span class="sourceLineNo">1839</span> * adds new ones. Regions added back have state CLOSED.<a name="line.1839"></a> -<span class="sourceLineNo">1840</span> * @param connection connection we're using<a name="line.1840"></a> -<span class="sourceLineNo">1841</span> * @param regionInfos list of regions to be added to META<a name="line.1841"></a> -<span class="sourceLineNo">1842</span> */<a name="line.1842"></a> -<span class="sourceLineNo">1843</span> public static void overwriteRegions(Connection connection,<a name="line.1843"></a> -<span class="sourceLineNo">1844</span> List<RegionInfo> regionInfos, int regionReplication) throws IOException {<a name="line.1844"></a> -<span class="sourceLineNo">1845</span> // use master time for delete marker and the Put<a name="line.1845"></a> -<span class="sourceLineNo">1846</span> long now = EnvironmentEdgeManager.currentTime();<a name="line.1846"></a> -<span class="sourceLineNo">1847</span> deleteRegions(connection, regionInfos, now);<a name="line.1847"></a> -<span class="sourceLineNo">1848</span> // Why sleep? 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region "<a name="line.1871"></a> -<span class="sourceLineNo">1872</span> + mergedRegion.getRegionNameAsString() + ", qualifier="<a name="line.1872"></a> -<span class="sourceLineNo">1873</span> + Bytes.toStringBinary(HConstants.MERGEA_QUALIFIER) + " and qualifier="<a name="line.1873"></a> -<span class="sourceLineNo">1874</span> + Bytes.toStringBinary(HConstants.MERGEB_QUALIFIER));<a name="line.1874"></a> -<span class="sourceLineNo">1875</span> }<a name="line.1875"></a> -<span class="sourceLineNo">1876</span><a name="line.1876"></a> -<span class="sourceLineNo">1877</span> public static Put addRegionInfo(final Put p, final RegionInfo hri)<a name="line.1877"></a> -<span class="sourceLineNo">1878</span> throws IOException {<a name="line.1878"></a> -<span class="sourceLineNo">1879</span> p.add(CellBuilderFactory.create(CellBuilderType.SHALLOW_COPY)<a name="line.1879"></a> -<span class="sourceLineNo">1880</span> .setRow(p.getRow())<a name="line.1880"></a> -<span 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class="sourceLineNo">1892</span> CellBuilder builder = CellBuilderFactory.create(CellBuilderType.SHALLOW_COPY);<a name="line.1892"></a> -<span class="sourceLineNo">1893</span> return p.add(builder.clear()<a name="line.1893"></a> -<span class="sourceLineNo">1894</span> .setRow(p.getRow())<a name="line.1894"></a> -<span class="sourceLineNo">1895</span> .setFamily(getCatalogFamily())<a name="line.1895"></a> -<span class="sourceLineNo">1896</span> .setQualifier(getServerColumn(replicaId))<a name="line.1896"></a> -<span class="sourceLineNo">1897</span> .setTimestamp(p.getTimestamp())<a name="line.1897"></a> -<span class="sourceLineNo">1898</span> .setType(Cell.Type.Put)<a name="line.1898"></a> -<span class="sourceLineNo">1899</span> .setValue(Bytes.toBytes(sn.getAddress().toString()))<a name="line.1899"></a> -<span class="sourceLineNo">1900</span> .build())<a name="line.1900"></a> -<span class="sourceLineNo">1901</span> .add(builder.clear()<a name="line.1901"></a> +<span 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class="sourceLineNo">1582</span> // Set initial state to CLOSED<a name="line.1582"></a> +<span class="sourceLineNo">1583</span> // NOTE: If initial state is not set to CLOSED then merged region gets added with the<a name="line.1583"></a> +<span class="sourceLineNo">1584</span> // default OFFLINE state. If Master gets restarted after this step, start up sequence of<a name="line.1584"></a> +<span class="sourceLineNo">1585</span> // master tries to assign this offline region. This is followed by re-assignments of the<a name="line.1585"></a> +<span class="sourceLineNo">1586</span> // merged region from resumed {@link MergeTableRegionsProcedure}<a name="line.1586"></a> +<span class="sourceLineNo">1587</span> addRegionStateToPut(putOfMerged, RegionState.State.CLOSED);<a name="line.1587"></a> +<span class="sourceLineNo">1588</span> mutations.add(putOfMerged);<a name="line.1588"></a> +<span class="sourceLineNo">1589</span> // The merged is a new region, openSeqNum = 1 is fine. ServerName may be null<a name="line.1589"></a> +<span class="sourceLineNo">1590</span> // if crash after merge happened but before we got to here.. means in-memory<a name="line.1590"></a> +<span class="sourceLineNo">1591</span> // locations of offlined merged, now-closed, regions is lost. Should be ok. We<a name="line.1591"></a> +<span class="sourceLineNo">1592</span> // assign the merged region later.<a name="line.1592"></a> +<span class="sourceLineNo">1593</span> if (sn != null) {<a name="line.1593"></a> +<span class="sourceLineNo">1594</span> addLocation(putOfMerged, sn, 1, mergedRegion.getReplicaId());<a name="line.1594"></a> +<span class="sourceLineNo">1595</span> }<a name="line.1595"></a> +<span class="sourceLineNo">1596</span><a name="line.1596"></a> +<span class="sourceLineNo">1597</span> // Add empty locations for region replicas of the merged region so that number of replicas can<a name="line.1597"></a> +<span class="sourceLineNo">1598</span> // be cached whenever the primary region is looked up from meta<a name="line.1598"></a> +<span class="sourceLineNo">1599</span> for (int i = 1; i < regionReplication; i++) {<a name="line.1599"></a> +<span class="sourceLineNo">1600</span> addEmptyLocation(putOfMerged, i);<a name="line.1600"></a> +<span class="sourceLineNo">1601</span> }<a name="line.1601"></a> +<span class="sourceLineNo">1602</span> // add parent reference for serial replication<a name="line.1602"></a> +<span class="sourceLineNo">1603</span> if (!replicationParents.isEmpty()) {<a name="line.1603"></a> +<span class="sourceLineNo">1604</span> addReplicationParent(putOfMerged, replicationParents);<a name="line.1604"></a> +<span class="sourceLineNo">1605</span> }<a name="line.1605"></a> +<span class="sourceLineNo">1606</span> byte[] tableRow = Bytes.toBytes(mergedRegion.getRegionNameAsString() + HConstants.DELIMITER);<a name="line.1606"></a> +<span class="sourceLineNo">1607</span> multiMutate(connection, meta, tableRow, mutations);<a name="line.1607"></a> +<span class="sourceLineNo">1608</span> }<a name="line.1608"></a> +<span class="sourceLineNo">1609</span> }<a name="line.1609"></a> +<span class="sourceLineNo">1610</span><a name="line.1610"></a> +<span class="sourceLineNo">1611</span> /**<a name="line.1611"></a> +<span class="sourceLineNo">1612</span> * Splits the region into two in an atomic operation. Offlines the parent region with the<a name="line.1612"></a> +<span class="sourceLineNo">1613</span> * information that it is split into two, and also adds the daughter regions. Does not add the<a name="line.1613"></a> +<span class="sourceLineNo">1614</span> * location information to the daughter regions since they are not open yet.<a name="line.1614"></a> +<span class="sourceLineNo">1615</span> * @param connection connection we're using<a name="line.1615"></a> +<span class="sourceLineNo">1616</span> * @param parent the parent region which is split<a name="line.1616"></a> +<span class="sourceLineNo">1617</span> * @param parentOpenSeqNum the next open sequence id for parent region, used by serial<a name="line.1617"></a> +<span class="sourceLineNo">1618</span> * replication. -1 if not necessary.<a name="line.1618"></a> +<span class="so
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