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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.hbase.classification.InterfaceAudience;
28 import org.apache.hadoop.hbase.HRegionInfo;
29 import org.apache.hadoop.hbase.ServerName;
30 import org.apache.hadoop.hbase.client.RegionReplicaUtil;
31 import org.apache.hadoop.hbase.errorhandling.ForeignException;
32 import org.apache.hadoop.hbase.master.MasterServices;
33 import org.apache.hadoop.hbase.mob.MobUtils;
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.snapshot.HBaseSnapshotException;
38 import org.apache.hadoop.hbase.util.Pair;
39
40 import com.google.common.collect.Lists;
41
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45
46
47 @InterfaceAudience.Private
48 public class EnabledTableSnapshotHandler extends TakeSnapshotHandler {
49
50 private static final Log LOG = LogFactory.getLog(EnabledTableSnapshotHandler.class);
51 private final ProcedureCoordinator coordinator;
52
53 public EnabledTableSnapshotHandler(SnapshotDescription snapshot, MasterServices master,
54 final SnapshotManager manager) {
55 super(snapshot, master);
56 this.coordinator = manager.getCoordinator();
57 }
58
59 @Override
60 public EnabledTableSnapshotHandler prepare() throws Exception {
61 return (EnabledTableSnapshotHandler) super.prepare();
62 }
63
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71
72 @Override
73 protected void snapshotRegions(List<Pair<HRegionInfo, ServerName>> regions)
74 throws HBaseSnapshotException, IOException {
75 Set<String> regionServers = new HashSet<String>(regions.size());
76 for (Pair<HRegionInfo, ServerName> region : regions) {
77 if (region != null && region.getFirst() != null && region.getSecond() != null) {
78 HRegionInfo hri = region.getFirst();
79 if (hri.isOffline() && (hri.isSplit() || hri.isSplitParent())) continue;
80 regionServers.add(region.getSecond().toString());
81 }
82 }
83
84
85 Procedure proc = coordinator.startProcedure(this.monitor, this.snapshot.getName(),
86 this.snapshot.toByteArray(), Lists.newArrayList(regionServers));
87 if (proc == null) {
88 String msg = "Failed to submit distributed procedure for snapshot '"
89 + snapshot.getName() + "'";
90 LOG.error(msg);
91 throw new HBaseSnapshotException(msg);
92 }
93
94 try {
95
96
97 proc.waitForCompleted();
98 LOG.info("Done waiting - online snapshot for " + this.snapshot.getName());
99
100
101 for (Pair<HRegionInfo, ServerName> region : regions) {
102 HRegionInfo regionInfo = region.getFirst();
103 if (regionInfo.isOffline() && (regionInfo.isSplit() || regionInfo.isSplitParent()) &&
104 RegionReplicaUtil.isDefaultReplica(regionInfo)) {
105 LOG.info("Take disabled snapshot of offline region=" + regionInfo);
106 snapshotDisabledRegion(regionInfo);
107 }
108 }
109
110 boolean mobEnabled = MobUtils.hasMobColumns(htd);
111 if (mobEnabled) {
112 LOG.info("Taking snapshot for mob files in table " + htd.getTableName());
113
114 HRegionInfo mobRegionInfo = MobUtils.getMobRegionInfo(htd.getTableName());
115 snapshotMobRegion(mobRegionInfo);
116 }
117 } catch (InterruptedException e) {
118 ForeignException ee =
119 new ForeignException("Interrupted while waiting for snapshot to finish", e);
120 monitor.receive(ee);
121 Thread.currentThread().interrupt();
122 } catch (ForeignException e) {
123 monitor.receive(e);
124 }
125 }
126
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129
130 private void snapshotMobRegion(final HRegionInfo regionInfo)
131 throws IOException {
132 snapshotManifest.addMobRegion(regionInfo);
133 monitor.rethrowException();
134 status.setStatus("Completed referencing HFiles for the mob region of table: " + snapshotTable);
135 }
136 }