Examples with HRegionInfo org.apache.hadoop.hbase.HRegionInfo used on opensource projects

Example 1 with HRegionInfo

use of org.apache.hadoop.hbase.HRegionInfo in project hbase by apache.

the class ConnectionImplementation method locateRegionInMeta.

/*
    * Search the hbase:meta table for the HRegionLocation
    * info that contains the table and row we're seeking.
    */
private RegionLocations locateRegionInMeta(TableName tableName, byte[] row, boolean useCache, boolean retry, int replicaId) throws IOException {
    // we already have the region.
    if (useCache) {
        RegionLocations locations = getCachedLocation(tableName, row);
        if (locations != null && locations.getRegionLocation(replicaId) != null) {
            return locations;
        }
    }
    // build the key of the meta region we should be looking for.
    // the extra 9's on the end are necessary to allow "exact" matches
    // without knowing the precise region names.
    byte[] metaKey = HRegionInfo.createRegionName(tableName, row, HConstants.NINES, false);
    Scan s = new Scan();
    s.setReversed(true);
    s.withStartRow(metaKey);
    s.addFamily(HConstants.CATALOG_FAMILY);
    s.setOneRowLimit();
    if (this.useMetaReplicas) {
        s.setConsistency(Consistency.TIMELINE);
    }
    int maxAttempts = (retry ? numTries : 1);
    for (int tries = 0; true; tries++) {
        if (tries >= maxAttempts) {
            throw new NoServerForRegionException("Unable to find region for " + Bytes.toStringBinary(row) + " in " + tableName + " after " + tries + " tries.");
        }
        if (useCache) {
            RegionLocations locations = getCachedLocation(tableName, row);
            if (locations != null && locations.getRegionLocation(replicaId) != null) {
                return locations;
            }
        } else {
            // If we are not supposed to be using the cache, delete any existing cached location
            // so it won't interfere.
            metaCache.clearCache(tableName, row);
        }
        // Query the meta region
        long pauseBase = this.pause;
        try {
            Result regionInfoRow = null;
            s.resetMvccReadPoint();
            try (ReversedClientScanner rcs = new ReversedClientScanner(conf, s, TableName.META_TABLE_NAME, this, rpcCallerFactory, rpcControllerFactory, getMetaLookupPool(), 0)) {
                regionInfoRow = rcs.next();
            }
            if (regionInfoRow == null) {
                throw new TableNotFoundException(tableName);
            }
            // convert the row result into the HRegionLocation we need!
            RegionLocations locations = MetaTableAccessor.getRegionLocations(regionInfoRow);
            if (locations == null || locations.getRegionLocation(replicaId) == null) {
                throw new IOException("HRegionInfo was null in " + tableName + ", row=" + regionInfoRow);
            }
            HRegionInfo regionInfo = locations.getRegionLocation(replicaId).getRegionInfo();
            if (regionInfo == null) {
                throw new IOException("HRegionInfo was null or empty in " + TableName.META_TABLE_NAME + ", row=" + regionInfoRow);
            }
            // possible we got a region of a different table...
            if (!regionInfo.getTable().equals(tableName)) {
                throw new TableNotFoundException("Table '" + tableName + "' was not found, got: " + regionInfo.getTable() + ".");
            }
            if (regionInfo.isSplit()) {
                throw new RegionOfflineException("the only available region for" + " the required row is a split parent," + " the daughters should be online soon: " + regionInfo.getRegionNameAsString());
            }
            if (regionInfo.isOffline()) {
                throw new RegionOfflineException("the region is offline, could" + " be caused by a disable table call: " + regionInfo.getRegionNameAsString());
            }
            ServerName serverName = locations.getRegionLocation(replicaId).getServerName();
            if (serverName == null) {
                throw new NoServerForRegionException("No server address listed " + "in " + TableName.META_TABLE_NAME + " for region " + regionInfo.getRegionNameAsString() + " containing row " + Bytes.toStringBinary(row));
            }
            if (isDeadServer(serverName)) {
                throw new RegionServerStoppedException("hbase:meta says the region " + regionInfo.getRegionNameAsString() + " is managed by the server " + serverName + ", but it is dead.");
            }
            // Instantiate the location
            cacheLocation(tableName, locations);
            return locations;
        } catch (TableNotFoundException e) {
            // from the HTable constructor.
            throw e;
        } catch (IOException e) {
            ExceptionUtil.rethrowIfInterrupt(e);
            if (e instanceof RemoteException) {
                e = ((RemoteException) e).unwrapRemoteException();
            }
            if (e instanceof CallQueueTooBigException) {
                // Give a special check on CallQueueTooBigException, see #HBASE-17114
                pauseBase = this.pauseForCQTBE;
            }
            if (tries < maxAttempts - 1) {
                if (LOG.isDebugEnabled()) {
                    LOG.debug("locateRegionInMeta parentTable=" + TableName.META_TABLE_NAME + ", metaLocation=" + ", attempt=" + tries + " of " + maxAttempts + " failed; retrying after sleep of " + ConnectionUtils.getPauseTime(pauseBase, tries) + " because: " + e.getMessage());
                }
            } else {
                throw e;
            }
            // Only relocate the parent region if necessary
            if (!(e instanceof RegionOfflineException || e instanceof NoServerForRegionException)) {
                relocateRegion(TableName.META_TABLE_NAME, metaKey, replicaId);
            }
        }
        try {
            Thread.sleep(ConnectionUtils.getPauseTime(pauseBase, tries));
        } catch (InterruptedException e) {
            throw new InterruptedIOException("Giving up trying to location region in " + "meta: thread is interrupted.");
        }
    }
}

Example 2 with HRegionInfo

use of org.apache.hadoop.hbase.HRegionInfo in project hbase by apache.

the class ConnectionImplementation method locateRegions.

@Override
public List<HRegionLocation> locateRegions(final TableName tableName, final boolean useCache, final boolean offlined) throws IOException {
    List<HRegionInfo> regions = MetaTableAccessor.getTableRegions(this, tableName, !offlined);
    final List<HRegionLocation> locations = new ArrayList<>();
    for (HRegionInfo regionInfo : regions) {
        RegionLocations list = locateRegion(tableName, regionInfo.getStartKey(), useCache, true);
        if (list != null) {
            for (HRegionLocation loc : list.getRegionLocations()) {
                if (loc != null) {
                    locations.add(loc);
                }
            }
        }
    }
    return locations;
}

Example 3 with HRegionInfo

use of org.apache.hadoop.hbase.HRegionInfo in project hbase by apache.

the class ConnectionImplementation method isTableAvailable.

@Override
public boolean isTableAvailable(final TableName tableName, @Nullable final byte[][] splitKeys) throws IOException {
    if (this.closed) {
        throw new IOException(toString() + " closed");
    }
    try {
        if (!isTableEnabled(tableName)) {
            LOG.debug("Table " + tableName + " not enabled");
            return false;
        }
        List<Pair<HRegionInfo, ServerName>> locations = MetaTableAccessor.getTableRegionsAndLocations(this, tableName, true);
        int notDeployed = 0;
        int regionCount = 0;
        for (Pair<HRegionInfo, ServerName> pair : locations) {
            HRegionInfo info = pair.getFirst();
            if (pair.getSecond() == null) {
                if (LOG.isDebugEnabled()) {
                    LOG.debug("Table " + tableName + " has not deployed region " + pair.getFirst().getEncodedName());
                }
                notDeployed++;
            } else if (splitKeys != null && !Bytes.equals(info.getStartKey(), HConstants.EMPTY_BYTE_ARRAY)) {
                for (byte[] splitKey : splitKeys) {
                    // Just check if the splitkey is available
                    if (Bytes.equals(info.getStartKey(), splitKey)) {
                        regionCount++;
                        break;
                    }
                }
            } else {
                // Always empty start row should be counted
                regionCount++;
            }
        }
        if (notDeployed > 0) {
            if (LOG.isDebugEnabled()) {
                LOG.debug("Table " + tableName + " has " + notDeployed + " regions");
            }
            return false;
        } else if (splitKeys != null && regionCount != splitKeys.length + 1) {
            if (LOG.isDebugEnabled()) {
                LOG.debug("Table " + tableName + " expected to have " + (splitKeys.length + 1) + " regions, but only " + regionCount + " available");
            }
            return false;
        } else {
            if (LOG.isDebugEnabled()) {
                LOG.debug("Table " + tableName + " should be available");
            }
            return true;
        }
    } catch (TableNotFoundException tnfe) {
        LOG.warn("Table " + tableName + " not enabled, it is not exists");
        return false;
    }
}

Example 4 with HRegionInfo

use of org.apache.hadoop.hbase.HRegionInfo in project hbase by apache.

the class TestClientNoCluster method makeHRegionInfos.

/**
   * @param count
   * @param namespaceSpan
   * @return <code>count</code> regions
   */
private static HRegionInfo[] makeHRegionInfos(final byte[] tableName, final int count, final long namespaceSpan) {
    byte[] startKey = HConstants.EMPTY_BYTE_ARRAY;
    byte[] endKey = HConstants.EMPTY_BYTE_ARRAY;
    long interval = namespaceSpan / count;
    HRegionInfo[] hris = new HRegionInfo[count];
    for (int i = 0; i < count; i++) {
        if (i == 0) {
            endKey = format(interval);
        } else {
            startKey = endKey;
            if (i == count - 1)
                endKey = HConstants.EMPTY_BYTE_ARRAY;
            else
                endKey = format((i + 1) * interval);
        }
        hris[i] = new HRegionInfo(TableName.valueOf(tableName), startKey, endKey);
    }
    return hris;
}

Example 5 with HRegionInfo

use of org.apache.hadoop.hbase.HRegionInfo in project hbase by apache.

the class TestClientNoCluster method doMetaGetResponse.

static GetResponse doMetaGetResponse(final SortedMap<byte[], Pair<HRegionInfo, ServerName>> meta, final GetRequest request) {
    ClientProtos.Result.Builder resultBuilder = ClientProtos.Result.newBuilder();
    ByteString row = request.getGet().getRow();
    Pair<HRegionInfo, ServerName> p = meta.get(row.toByteArray());
    if (p != null) {
        resultBuilder.addCell(getRegionInfo(row, p.getFirst()));
        resultBuilder.addCell(getServer(row, p.getSecond()));
    }
    resultBuilder.addCell(getStartCode(row));
    GetResponse.Builder builder = GetResponse.newBuilder();
    builder.setResult(resultBuilder.build());
    return builder.build();
}