1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18 package org.apache.hadoop.hbase.master.snapshot;
19
20 import java.io.IOException;
21 import java.util.HashSet;
22 import java.util.List;
23 import java.util.Set;
24
25 import org.apache.commons.logging.Log;
26 import org.apache.commons.logging.LogFactory;
27 import org.apache.hadoop.classification.InterfaceAudience;
28 import org.apache.hadoop.fs.Path;
29 import org.apache.hadoop.hbase.HRegionInfo;
30 import org.apache.hadoop.hbase.ServerName;
31 import org.apache.hadoop.hbase.errorhandling.ForeignException;
32 import org.apache.hadoop.hbase.master.MasterServices;
33 import org.apache.hadoop.hbase.master.metrics.MasterMetrics;
34 import org.apache.hadoop.hbase.procedure.Procedure;
35 import org.apache.hadoop.hbase.procedure.ProcedureCoordinator;
36 import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription;
37 import org.apache.hadoop.hbase.regionserver.HRegion;
38 import org.apache.hadoop.hbase.snapshot.HBaseSnapshotException;
39 import org.apache.hadoop.hbase.snapshot.SnapshotDescriptionUtils;
40 import org.apache.hadoop.hbase.util.Pair;
41
42 import com.google.common.collect.Lists;
43
44
45
46
47
48
49 @InterfaceAudience.Private
50 public class EnabledTableSnapshotHandler extends TakeSnapshotHandler {
51
52 private static final Log LOG = LogFactory.getLog(EnabledTableSnapshotHandler.class);
53 private final ProcedureCoordinator coordinator;
54
55 public EnabledTableSnapshotHandler(SnapshotDescription snapshot, MasterServices master,
56 final SnapshotManager manager, final MasterMetrics metricsMaster) {
57 super(snapshot, master, metricsMaster);
58 this.coordinator = manager.getCoordinator();
59 }
60
61
62
63
64
65
66
67
68
69 @Override
70 protected void snapshotRegions(List<Pair<HRegionInfo, ServerName>> regions)
71 throws HBaseSnapshotException, IOException {
72 Set<String> regionServers = new HashSet<String>(regions.size());
73 for (Pair<HRegionInfo, ServerName> region : regions) {
74 if (region != null && region.getFirst() != null && region.getSecond() != null) {
75 HRegionInfo hri = region.getFirst();
76 if (hri.isOffline() && (hri.isSplit() || hri.isSplitParent())) continue;
77 regionServers.add(region.getSecond().toString());
78 }
79 }
80
81
82 Procedure proc = coordinator.startProcedure(this.monitor, this.snapshot.getName(),
83 this.snapshot.toByteArray(), Lists.newArrayList(regionServers));
84 if (proc == null) {
85 String msg = "Failed to submit distributed procedure for snapshot '"
86 + snapshot.getName() + "'";
87 LOG.error(msg);
88 throw new HBaseSnapshotException(msg);
89 }
90
91 try {
92
93
94 proc.waitForCompleted();
95 LOG.info("Done waiting - online snapshot for " + this.snapshot.getName());
96
97
98 Path snapshotDir = SnapshotDescriptionUtils.getWorkingSnapshotDir(snapshot, rootDir);
99 for (Pair<HRegionInfo, ServerName> region : regions) {
100 HRegionInfo regionInfo = region.getFirst();
101 if (regionInfo.isOffline() && (regionInfo.isSplit() || regionInfo.isSplitParent())) {
102 if (!fs.exists(new Path(snapshotDir, regionInfo.getEncodedName()))) {
103 LOG.info("Take disabled snapshot of offline region=" + regionInfo);
104 snapshotDisabledRegion(regionInfo);
105 }
106 }
107 }
108 } catch (InterruptedException e) {
109 ForeignException ee =
110 new ForeignException("Interrupted while waiting for snapshot to finish", e);
111 monitor.receive(ee);
112 Thread.currentThread().interrupt();
113 } catch (ForeignException e) {
114 monitor.receive(e);
115 }
116 }
117 }