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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 import java.util.concurrent.ThreadPoolExecutor;
25
26 import org.apache.commons.logging.Log;
27 import org.apache.commons.logging.LogFactory;
28 import org.apache.hadoop.conf.Configuration;
29 import org.apache.hadoop.hbase.classification.InterfaceAudience;
30 import org.apache.hadoop.hbase.classification.InterfaceStability;
31 import org.apache.hadoop.hbase.HRegionInfo;
32 import org.apache.hadoop.hbase.ServerName;
33 import org.apache.hadoop.hbase.client.RegionReplicaUtil;
34 import org.apache.hadoop.hbase.errorhandling.ForeignException;
35 import org.apache.hadoop.hbase.errorhandling.ForeignExceptionListener;
36 import org.apache.hadoop.hbase.errorhandling.TimeoutExceptionInjector;
37 import org.apache.hadoop.hbase.master.MasterServices;
38 import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription;
39 import org.apache.hadoop.hbase.snapshot.ClientSnapshotDescriptionUtils;
40 import org.apache.hadoop.hbase.snapshot.SnapshotDescriptionUtils;
41 import org.apache.hadoop.hbase.snapshot.SnapshotManifest;
42 import org.apache.hadoop.hbase.util.FSUtils;
43 import org.apache.hadoop.hbase.util.ModifyRegionUtils;
44 import org.apache.hadoop.hbase.util.Pair;
45 import org.apache.zookeeper.KeeperException;
46
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51
52 @InterfaceAudience.Private
53 @InterfaceStability.Evolving
54 public class DisabledTableSnapshotHandler extends TakeSnapshotHandler {
55 private static final Log LOG = LogFactory.getLog(DisabledTableSnapshotHandler.class);
56 private final TimeoutExceptionInjector timeoutInjector;
57
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61
62 public DisabledTableSnapshotHandler(SnapshotDescription snapshot,
63 final MasterServices masterServices) {
64 super(snapshot, masterServices);
65
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67 timeoutInjector = getMasterTimerAndBindToMonitor(snapshot, conf, monitor);
68 }
69
70 @Override
71 public DisabledTableSnapshotHandler prepare() throws Exception {
72 return (DisabledTableSnapshotHandler) super.prepare();
73 }
74
75
76
77 @Override
78 public void snapshotRegions(List<Pair<HRegionInfo, ServerName>> regionsAndLocations)
79 throws IOException, KeeperException {
80 try {
81 timeoutInjector.start();
82
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86 Set<HRegionInfo> regions = new HashSet<HRegionInfo>();
87 for (Pair<HRegionInfo, ServerName> p : regionsAndLocations) {
88
89 HRegionInfo hri = p.getFirst();
90 if (RegionReplicaUtil.isDefaultReplica(hri)) {
91 regions.add(hri);
92 }
93 }
94
95
96 String msg = "Starting to write region info and WALs for regions for offline snapshot:"
97 + ClientSnapshotDescriptionUtils.toString(snapshot);
98 LOG.info(msg);
99 status.setStatus(msg);
100
101 ThreadPoolExecutor exec = SnapshotManifest.createExecutor(conf, "DisabledTableSnapshot");
102 try {
103 ModifyRegionUtils.editRegions(exec, regions, new ModifyRegionUtils.RegionEditTask() {
104 @Override
105 public void editRegion(final HRegionInfo regionInfo) throws IOException {
106 snapshotManifest.addRegion(FSUtils.getTableDir(rootDir, snapshotTable), regionInfo);
107 }
108 });
109 } finally {
110 exec.shutdown();
111 }
112 } catch (Exception e) {
113
114 String reason = "Failed snapshot " + ClientSnapshotDescriptionUtils.toString(snapshot)
115 + " due to exception:" + e.getMessage();
116 ForeignException ee = new ForeignException(reason, e);
117 monitor.receive(ee);
118 status.abort("Snapshot of table: "+ snapshotTable + " failed because " + e.getMessage());
119 } finally {
120 LOG.debug("Marking snapshot" + ClientSnapshotDescriptionUtils.toString(snapshot)
121 + " as finished.");
122
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125 timeoutInjector.complete();
126 }
127 }
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137 private TimeoutExceptionInjector getMasterTimerAndBindToMonitor(SnapshotDescription snapshot,
138 Configuration conf, ForeignExceptionListener monitor) {
139 long maxTime = SnapshotDescriptionUtils.getMaxMasterTimeout(conf, snapshot.getType(),
140 SnapshotDescriptionUtils.DEFAULT_MAX_WAIT_TIME);
141 return new TimeoutExceptionInjector(monitor, maxTime);
142 }
143 }