| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.hbase.wal; |
| |
| import static org.apache.hadoop.hbase.wal.WALSplitUtil.getCompletedRecoveredEditsFilePath; |
| import static org.apache.hadoop.hbase.wal.WALSplitUtil.getRegionSplitEditsPath; |
| |
| import java.io.EOFException; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hbase.Cell; |
| import org.apache.hadoop.hbase.CellUtil; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.log.HBaseMarkers; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.apache.hadoop.ipc.RemoteException; |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.hbase.thirdparty.org.apache.commons.collections4.MapUtils; |
| |
| @InterfaceAudience.Private |
| abstract class AbstractRecoveredEditsOutputSink extends OutputSink { |
| private static final Logger LOG = LoggerFactory.getLogger(RecoveredEditsOutputSink.class); |
| private final WALSplitter walSplitter; |
| private final ConcurrentMap<String, Long> regionMaximumEditLogSeqNum = new ConcurrentHashMap<>(); |
| |
| public AbstractRecoveredEditsOutputSink(WALSplitter walSplitter, |
| WALSplitter.PipelineController controller, EntryBuffers entryBuffers, int numWriters) { |
| super(controller, entryBuffers, numWriters); |
| this.walSplitter = walSplitter; |
| } |
| |
| /** |
| * @return a writer that wraps a {@link WALProvider.Writer} and its Path. Caller should close. |
| */ |
| protected RecoveredEditsWriter createRecoveredEditsWriter(TableName tableName, byte[] region, |
| long seqId) throws IOException { |
| Path regionEditsPath = getRegionSplitEditsPath(tableName, region, seqId, |
| walSplitter.getFileBeingSplit().getPath().getName(), walSplitter.getTmpDirName(), |
| walSplitter.conf); |
| if (walSplitter.walFS.exists(regionEditsPath)) { |
| LOG.warn("Found old edits file. It could be the " + |
| "result of a previous failed split attempt. Deleting " + regionEditsPath + ", length=" + |
| walSplitter.walFS.getFileStatus(regionEditsPath).getLen()); |
| if (!walSplitter.walFS.delete(regionEditsPath, false)) { |
| LOG.warn("Failed delete of old {}", regionEditsPath); |
| } |
| } |
| WALProvider.Writer w = walSplitter.createWriter(regionEditsPath); |
| LOG.info("Creating recovered edits writer path={}", regionEditsPath); |
| return new RecoveredEditsWriter(region, regionEditsPath, w, seqId); |
| } |
| |
| protected Path closeRecoveredEditsWriter(RecoveredEditsWriter editsWriter, |
| List<IOException> thrown) throws IOException { |
| try { |
| editsWriter.writer.close(); |
| } catch (IOException ioe) { |
| LOG.error("Could not close recovered edits at {}", editsWriter.path, ioe); |
| thrown.add(ioe); |
| return null; |
| } |
| LOG.info("Closed recovered edits writer path={} (wrote {} edits, skipped {} edits in {} ms", |
| editsWriter.path, editsWriter.editsWritten, editsWriter.editsSkipped, |
| editsWriter.nanosSpent / 1000 / 1000); |
| if (editsWriter.editsWritten == 0) { |
| // just remove the empty recovered.edits file |
| if (walSplitter.walFS.exists(editsWriter.path) && |
| !walSplitter.walFS.delete(editsWriter.path, false)) { |
| LOG.warn("Failed deleting empty {}", editsWriter.path); |
| throw new IOException("Failed deleting empty " + editsWriter.path); |
| } |
| return null; |
| } |
| |
| Path dst = getCompletedRecoveredEditsFilePath(editsWriter.path, |
| regionMaximumEditLogSeqNum.get(Bytes.toString(editsWriter.encodedRegionName))); |
| try { |
| if (!dst.equals(editsWriter.path) && walSplitter.walFS.exists(dst)) { |
| deleteOneWithFewerEntries(editsWriter, dst); |
| } |
| // Skip the unit tests which create a splitter that reads and |
| // writes the data without touching disk. |
| // TestHLogSplit#testThreading is an example. |
| if (walSplitter.walFS.exists(editsWriter.path)) { |
| if (!walSplitter.walFS.rename(editsWriter.path, dst)) { |
| throw new IOException( |
| "Failed renaming recovered edits " + editsWriter.path + " to " + dst); |
| } |
| LOG.info("Rename recovered edits {} to {}", editsWriter.path, dst); |
| } |
| } catch (IOException ioe) { |
| LOG.error("Could not rename recovered edits {} to {}", editsWriter.path, dst, ioe); |
| thrown.add(ioe); |
| return null; |
| } |
| return dst; |
| } |
| |
| @Override |
| public boolean keepRegionEvent(WAL.Entry entry) { |
| ArrayList<Cell> cells = entry.getEdit().getCells(); |
| for (Cell cell : cells) { |
| if (WALEdit.isCompactionMarker(cell)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Update region's maximum edit log SeqNum. |
| */ |
| void updateRegionMaximumEditLogSeqNum(WAL.Entry entry) { |
| synchronized (regionMaximumEditLogSeqNum) { |
| String regionName = Bytes.toString(entry.getKey().getEncodedRegionName()); |
| Long currentMaxSeqNum = regionMaximumEditLogSeqNum.get(regionName); |
| if (currentMaxSeqNum == null || entry.getKey().getSequenceId() > currentMaxSeqNum) { |
| regionMaximumEditLogSeqNum.put(regionName, entry.getKey().getSequenceId()); |
| } |
| } |
| } |
| |
| // delete the one with fewer wal entries |
| private void deleteOneWithFewerEntries(RecoveredEditsWriter editsWriter, Path dst) |
| throws IOException { |
| long dstMinLogSeqNum = -1L; |
| try (WAL.Reader reader = walSplitter.getWalFactory().createReader(walSplitter.walFS, dst)) { |
| WAL.Entry entry = reader.next(); |
| if (entry != null) { |
| dstMinLogSeqNum = entry.getKey().getSequenceId(); |
| } |
| } catch (EOFException e) { |
| LOG.debug("Got EOF when reading first WAL entry from {}, an empty or broken WAL file?", dst, |
| e); |
| } |
| if (editsWriter.minLogSeqNum < dstMinLogSeqNum) { |
| LOG.warn("Found existing old edits file. It could be the result of a previous failed" + |
| " split attempt or we have duplicated wal entries. Deleting " + dst + ", length=" + |
| walSplitter.walFS.getFileStatus(dst).getLen()); |
| if (!walSplitter.walFS.delete(dst, false)) { |
| LOG.warn("Failed deleting of old {}", dst); |
| throw new IOException("Failed deleting of old " + dst); |
| } |
| } else { |
| LOG.warn( |
| "Found existing old edits file and we have less entries. Deleting " + editsWriter.path + |
| ", length=" + walSplitter.walFS.getFileStatus(editsWriter.path).getLen()); |
| if (!walSplitter.walFS.delete(editsWriter.path, false)) { |
| LOG.warn("Failed deleting of {}", editsWriter.path); |
| throw new IOException("Failed deleting of " + editsWriter.path); |
| } |
| } |
| } |
| |
| /** |
| * Private data structure that wraps a {@link WALProvider.Writer} and its Path, also collecting |
| * statistics about the data written to this output. |
| */ |
| final class RecoveredEditsWriter { |
| /* Count of edits written to this path */ |
| long editsWritten = 0; |
| /* Count of edits skipped to this path */ |
| long editsSkipped = 0; |
| /* Number of nanos spent writing to this log */ |
| long nanosSpent = 0; |
| |
| final byte[] encodedRegionName; |
| final Path path; |
| final WALProvider.Writer writer; |
| final long minLogSeqNum; |
| |
| RecoveredEditsWriter(byte[] encodedRegionName, Path path, WALProvider.Writer writer, |
| long minLogSeqNum) { |
| this.encodedRegionName = encodedRegionName; |
| this.path = path; |
| this.writer = writer; |
| this.minLogSeqNum = minLogSeqNum; |
| } |
| |
| private void incrementEdits(int edits) { |
| editsWritten += edits; |
| } |
| |
| private void incrementSkippedEdits(int skipped) { |
| editsSkipped += skipped; |
| totalSkippedEdits.addAndGet(skipped); |
| } |
| |
| private void incrementNanoTime(long nanos) { |
| nanosSpent += nanos; |
| } |
| |
| void writeRegionEntries(List<WAL.Entry> entries) throws IOException { |
| long startTime = System.nanoTime(); |
| try { |
| int editsCount = 0; |
| for (WAL.Entry logEntry : entries) { |
| filterCellByStore(logEntry); |
| if (!logEntry.getEdit().isEmpty()) { |
| writer.append(logEntry); |
| updateRegionMaximumEditLogSeqNum(logEntry); |
| editsCount++; |
| } else { |
| incrementSkippedEdits(1); |
| } |
| } |
| // Pass along summary statistics |
| incrementEdits(editsCount); |
| incrementNanoTime(System.nanoTime() - startTime); |
| } catch (IOException e) { |
| e = e instanceof RemoteException ? ((RemoteException) e).unwrapRemoteException() : e; |
| LOG.error(HBaseMarkers.FATAL, "Got while writing log entry to log", e); |
| throw e; |
| } |
| } |
| |
| private void filterCellByStore(WAL.Entry logEntry) { |
| Map<byte[], Long> maxSeqIdInStores = walSplitter.getRegionMaxSeqIdInStores() |
| .get(Bytes.toString(logEntry.getKey().getEncodedRegionName())); |
| if (MapUtils.isEmpty(maxSeqIdInStores)) { |
| return; |
| } |
| // Create the array list for the cells that aren't filtered. |
| // We make the assumption that most cells will be kept. |
| ArrayList<Cell> keptCells = new ArrayList<>(logEntry.getEdit().getCells().size()); |
| for (Cell cell : logEntry.getEdit().getCells()) { |
| if (WALEdit.isMetaEditFamily(cell)) { |
| keptCells.add(cell); |
| } else { |
| byte[] family = CellUtil.cloneFamily(cell); |
| Long maxSeqId = maxSeqIdInStores.get(family); |
| // Do not skip cell even if maxSeqId is null. Maybe we are in a rolling upgrade, |
| // or the master was crashed before and we can not get the information. |
| if (maxSeqId == null || maxSeqId.longValue() < logEntry.getKey().getSequenceId()) { |
| keptCells.add(cell); |
| } |
| } |
| } |
| |
| // Anything in the keptCells array list is still live. |
| // So rather than removing the cells from the array list |
| // which would be an O(n^2) operation, we just replace the list |
| logEntry.getEdit().setCells(keptCells); |
| } |
| } |
| } |