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

Example 31 with RegionLocations

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

the class MetaCache method clearCache.

public void clearCache(final HRegionLocation location) {
    if (location == null) {
        return;
    }
    TableName tableName = location.getRegionInfo().getTable();
    ConcurrentMap<byte[], RegionLocations> tableLocations = getTableLocations(tableName);
    RegionLocations regionLocations = tableLocations.get(location.getRegionInfo().getStartKey());
    if (regionLocations != null) {
        RegionLocations updatedLocations = regionLocations.remove(location);
        boolean removed;
        if (updatedLocations != regionLocations) {
            if (updatedLocations.isEmpty()) {
                removed = tableLocations.remove(location.getRegionInfo().getStartKey(), regionLocations);
            } else {
                removed = tableLocations.replace(location.getRegionInfo().getStartKey(), regionLocations, updatedLocations);
            }
            if (removed) {
                if (metrics != null) {
                    metrics.incrMetaCacheNumClearRegion();
                }
                if (LOG.isTraceEnabled()) {
                    LOG.trace("Removed " + location + " from cache");
                }
            }
        }
    }
}

Example 32 with RegionLocations

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

the class MetaCache method getNumberOfCachedRegionLocations.

/**
   * Return the number of cached region for a table. It will only be called
   * from a unit test.
   */
public int getNumberOfCachedRegionLocations(final TableName tableName) {
    Map<byte[], RegionLocations> tableLocs = this.cachedRegionLocations.get(tableName);
    if (tableLocs == null) {
        return 0;
    }
    int numRegions = 0;
    for (RegionLocations tableLoc : tableLocs.values()) {
        numRegions += tableLoc.numNonNullElements();
    }
    return numRegions;
}

Example 33 with RegionLocations

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

the class MultiThreadedAction method printLocations.

private void printLocations(Result r) {
    RegionLocations rl = null;
    if (r == null) {
        LOG.info("FAILED FOR null Result");
        return;
    }
    LOG.info("FAILED FOR " + resultToString(r) + " Stale " + r.isStale());
    if (r.getRow() == null) {
        return;
    }
    try {
        rl = ((ClusterConnection) connection).locateRegion(tableName, r.getRow(), true, true);
    } catch (IOException e) {
        LOG.warn("Couldn't get locations for row " + Bytes.toString(r.getRow()));
    }
    HRegionLocation[] locations = rl.getRegionLocations();
    for (HRegionLocation h : locations) {
        LOG.info("LOCATION " + h);
    }
}

Example 34 with RegionLocations

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

the class ZKAsyncRegistry method getMetaRegionLocation.

@Override
public CompletableFuture<RegionLocations> getMetaRegionLocation() {
    CompletableFuture<RegionLocations> future = new CompletableFuture<>();
    HRegionLocation[] locs = new HRegionLocation[znodePaths.metaReplicaZNodes.size()];
    MutableInt remaining = new MutableInt(locs.length);
    znodePaths.metaReplicaZNodes.forEach((replicaId, path) -> {
        if (replicaId == DEFAULT_REPLICA_ID) {
            exec(zk.getData(), path, ZKAsyncRegistry::getMetaProto).whenComplete((proto, error) -> {
                if (error != null) {
                    future.completeExceptionally(error);
                    return;
                }
                if (proto == null) {
                    future.completeExceptionally(new IOException("Meta znode is null"));
                    return;
                }
                Pair<RegionState.State, ServerName> stateAndServerName = getStateAndServerName(proto);
                if (stateAndServerName.getFirst() != RegionState.State.OPEN) {
                    future.completeExceptionally(new IOException("Meta region is in state " + stateAndServerName.getFirst()));
                    return;
                }
                locs[DEFAULT_REPLICA_ID] = new HRegionLocation(getRegionInfoForDefaultReplica(FIRST_META_REGIONINFO), stateAndServerName.getSecond());
                tryComplete(remaining, locs, future);
            });
        } else {
            exec(zk.getData(), path, ZKAsyncRegistry::getMetaProto).whenComplete((proto, error) -> {
                if (future.isDone()) {
                    return;
                }
                if (error != null) {
                    LOG.warn("Failed to fetch " + path, error);
                    locs[replicaId] = null;
                } else if (proto == null) {
                    LOG.warn("Meta znode for replica " + replicaId + " is null");
                    locs[replicaId] = null;
                } else {
                    Pair<RegionState.State, ServerName> stateAndServerName = getStateAndServerName(proto);
                    if (stateAndServerName.getFirst() != RegionState.State.OPEN) {
                        LOG.warn("Meta region for replica " + replicaId + " is in state " + stateAndServerName.getFirst());
                        locs[replicaId] = null;
                    } else {
                        locs[replicaId] = new HRegionLocation(getRegionInfoForReplica(FIRST_META_REGIONINFO, replicaId), stateAndServerName.getSecond());
                    }
                }
                tryComplete(remaining, locs, future);
            });
        }
    });
    return future;
}

Example 35 with RegionLocations

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

the class RegionAdminServiceCallable method getLocation.

public HRegionLocation getLocation(boolean useCache) throws IOException {
    RegionLocations rl = getRegionLocations(connection, tableName, row, useCache, replicaId);
    if (rl == null) {
        throw new HBaseIOException(getExceptionMessage());
    }
    HRegionLocation location = rl.getRegionLocation(replicaId);
    if (location == null) {
        throw new HBaseIOException(getExceptionMessage());
    }
    return location;
}