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HBASE-10153 improve VerifyReplication to compute BADROWS more accurately (Jianwei)

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Ted Yu 2014-10-03 03:29:45 +00:00
parent 7219471081
commit 8dbf7b2238
1 changed files with 53 additions and 10 deletions
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63
hbase-server/src/main/java/org/apache/hadoop/hbase/mapreduce/replication/VerifyReplication.java
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@ -38,6 +38,7 @@ import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
import org.apache.hadoop.hbase.mapreduce.TableInputFormat;
import org.apache.hadoop.hbase.mapreduce.TableMapReduceUtil;
import org.apache.hadoop.hbase.mapreduce.TableMapper;
import org.apache.hadoop.hbase.mapreduce.TableSplit;
import org.apache.hadoop.hbase.replication.ReplicationException;
import org.apache.hadoop.hbase.replication.ReplicationFactory;
import org.apache.hadoop.hbase.replication.ReplicationPeerZKImpl;
@ -83,9 +84,11 @@ public class VerifyReplication extends Configured implements Tool {
public static class Verifier
extends TableMapper<ImmutableBytesWritable, Put> {
public static enum Counters {GOODROWS, BADROWS}
public static enum Counters {
GOODROWS, BADROWS, ONLY_IN_SOURCE_TABLE_ROWS, ONLY_IN_PEER_TABLE_ROWS, CONTENT_DIFFERENT_ROWS}
private ResultScanner replicatedScanner;
private Result currentCompareRowInPeerTable;
/**
* Map method that compares every scanned row with the equivalent from
@ -116,6 +119,8 @@ public class VerifyReplication extends Configured implements Tool {
if (versions >= 0) {
scan.setMaxVersions(versions);
}
final TableSplit tableSplit = (TableSplit)(context.getInputSplit());
HConnectionManager.execute(new HConnectable<Void>(conf) {
@Override
public Void connect(HConnection conn) throws IOException {
@ -126,26 +131,64 @@ public class VerifyReplication extends Configured implements Tool {
TableName tableName = TableName.valueOf(conf.get(NAME + ".tableName"));
Table replicatedTable = new HTable(peerConf, tableName);
scan.setStartRow(value.getRow());
scan.setStopRow(tableSplit.getEndRow());
replicatedScanner = replicatedTable.getScanner(scan);
return null;
}
});
currentCompareRowInPeerTable = replicatedScanner.next();
}
Result res = replicatedScanner.next();
try {
Result.compareResults(value, res);
context.getCounter(Counters.GOODROWS).increment(1);
} catch (Exception e) {
LOG.warn("Bad row", e);
context.getCounter(Counters.BADROWS).increment(1);
while (true) {
if (currentCompareRowInPeerTable == null) {
// reach the region end of peer table, row only in source table
logFailRowAndIncreaseCounter(context, Counters.ONLY_IN_SOURCE_TABLE_ROWS, value);
break;
}
int rowCmpRet = Bytes.compareTo(value.getRow(), currentCompareRowInPeerTable.getRow());
if (rowCmpRet == 0) {
// rowkey is same, need to compare the content of the row
try {
Result.compareResults(value, currentCompareRowInPeerTable);
context.getCounter(Counters.GOODROWS).increment(1);
} catch (Exception e) {
logFailRowAndIncreaseCounter(context, Counters.CONTENT_DIFFERENT_ROWS, value);
}
currentCompareRowInPeerTable = replicatedScanner.next();
break;
} else if (rowCmpRet < 0) {
// row only exists in source table
logFailRowAndIncreaseCounter(context, Counters.ONLY_IN_SOURCE_TABLE_ROWS, value);
break;
} else {
// row only exists in peer table
logFailRowAndIncreaseCounter(context, Counters.ONLY_IN_PEER_TABLE_ROWS,
currentCompareRowInPeerTable);
currentCompareRowInPeerTable = replicatedScanner.next();
}
}
}
private void logFailRowAndIncreaseCounter(Context context, Counters counter, Result row) {
context.getCounter(counter).increment(1);
context.getCounter(Counters.BADROWS).increment(1);
LOG.error(counter.toString() + ", rowkey=" + Bytes.toString(row.getRow()));
}
@Override
protected void cleanup(Context context) {
if (replicatedScanner != null) {
replicatedScanner.close();
replicatedScanner = null;
try {
while (currentCompareRowInPeerTable != null) {
logFailRowAndIncreaseCounter(context, Counters.ONLY_IN_PEER_TABLE_ROWS,
currentCompareRowInPeerTable);
currentCompareRowInPeerTable = replicatedScanner.next();
}
} catch (Exception e) {
LOG.error("fail to scan peer table in cleanup", e);
} finally {
replicatedScanner.close();
replicatedScanner = null;
}
}
}
}