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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.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.MetricsMaster;
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.snapshot.SnapshotDescriptionUtils;
39 import org.apache.hadoop.hbase.util.Pair;
40
41 import com.google.common.collect.Lists;
42
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46
47
48 @InterfaceAudience.Private
49 public class EnabledTableSnapshotHandler extends TakeSnapshotHandler {
50
51 private static final Log LOG = LogFactory.getLog(EnabledTableSnapshotHandler.class);
52 private final ProcedureCoordinator coordinator;
53
54 public EnabledTableSnapshotHandler(SnapshotDescription snapshot, MasterServices master,
55 final SnapshotManager manager) {
56 super(snapshot, master);
57 this.coordinator = manager.getCoordinator();
58 }
59
60 @Override
61 public EnabledTableSnapshotHandler prepare() throws Exception {
62 return (EnabledTableSnapshotHandler) super.prepare();
63 }
64
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73 @Override
74 protected void snapshotRegions(List<Pair<HRegionInfo, ServerName>> regions)
75 throws HBaseSnapshotException, IOException {
76 Set<String> regionServers = new HashSet<String>(regions.size());
77 for (Pair<HRegionInfo, ServerName> region : regions) {
78 if (region != null && region.getFirst() != null && region.getSecond() != null) {
79 HRegionInfo hri = region.getFirst();
80 if (hri.isOffline() && (hri.isSplit() || hri.isSplitParent())) continue;
81 regionServers.add(region.getSecond().toString());
82 }
83 }
84
85
86 Procedure proc = coordinator.startProcedure(this.monitor, this.snapshot.getName(),
87 this.snapshot.toByteArray(), Lists.newArrayList(regionServers));
88 if (proc == null) {
89 String msg = "Failed to submit distributed procedure for snapshot '"
90 + snapshot.getName() + "'";
91 LOG.error(msg);
92 throw new HBaseSnapshotException(msg);
93 }
94
95 try {
96
97
98 proc.waitForCompleted();
99 LOG.info("Done waiting - online snapshot for " + this.snapshot.getName());
100
101
102 Path snapshotDir = SnapshotDescriptionUtils.getWorkingSnapshotDir(snapshot, rootDir);
103 for (Pair<HRegionInfo, ServerName> region : regions) {
104 HRegionInfo regionInfo = region.getFirst();
105 if (regionInfo.isOffline() && (regionInfo.isSplit() || regionInfo.isSplitParent())) {
106 if (!fs.exists(new Path(snapshotDir, regionInfo.getEncodedName()))) {
107 LOG.info("Take disabled snapshot of offline region=" + regionInfo);
108 snapshotDisabledRegion(regionInfo);
109 }
110 }
111 }
112 } catch (InterruptedException e) {
113 ForeignException ee =
114 new ForeignException("Interrupted while waiting for snapshot to finish", e);
115 monitor.receive(ee);
116 Thread.currentThread().interrupt();
117 } catch (ForeignException e) {
118 monitor.receive(e);
119 }
120 }
121 }