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

Example 31 with HRegionLocation

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

the class MetaCache method clearCache.

/**
   * Deletes the cached location of the region if necessary, based on some error from source.
   * @param hri The region in question.
   */
public void clearCache(HRegionInfo hri) {
    ConcurrentMap<byte[], RegionLocations> tableLocations = getTableLocations(hri.getTable());
    RegionLocations regionLocations = tableLocations.get(hri.getStartKey());
    if (regionLocations != null) {
        HRegionLocation oldLocation = regionLocations.getRegionLocation(hri.getReplicaId());
        if (oldLocation == null)
            return;
        RegionLocations updatedLocations = regionLocations.remove(oldLocation);
        boolean removed;
        if (updatedLocations != regionLocations) {
            if (updatedLocations.isEmpty()) {
                removed = tableLocations.remove(hri.getStartKey(), regionLocations);
            } else {
                removed = tableLocations.replace(hri.getStartKey(), regionLocations, updatedLocations);
            }
            if (removed) {
                if (metrics != null) {
                    metrics.incrMetaCacheNumClearRegion();
                }
                if (LOG.isTraceEnabled()) {
                    LOG.trace("Removed " + oldLocation + " from cache");
                }
            }
        }
    }
}

Example 32 with HRegionLocation

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

the class MetaCache method cacheLocation.

/**
   * Put a newly discovered HRegionLocation into the cache.
   * @param tableName The table name.
   * @param source the source of the new location
   * @param location the new location
   */
public void cacheLocation(final TableName tableName, final ServerName source, final HRegionLocation location) {
    assert source != null;
    byte[] startKey = location.getRegionInfo().getStartKey();
    ConcurrentMap<byte[], RegionLocations> tableLocations = getTableLocations(tableName);
    RegionLocations locations = new RegionLocations(new HRegionLocation[] { location });
    RegionLocations oldLocations = tableLocations.putIfAbsent(startKey, locations);
    boolean isNewCacheEntry = (oldLocations == null);
    if (isNewCacheEntry) {
        if (LOG.isTraceEnabled()) {
            LOG.trace("Cached location: " + location);
        }
        addToCachedServers(locations);
        return;
    }
    // If the server in cache sends us a redirect, assume it's always valid.
    HRegionLocation oldLocation = oldLocations.getRegionLocation(location.getRegionInfo().getReplicaId());
    boolean force = oldLocation != null && oldLocation.getServerName() != null && oldLocation.getServerName().equals(source);
    // For redirect if the number is equal to previous
    // record, the most common case is that first the region was closed with seqNum, and then
    // opened with the same seqNum; hence we will ignore the redirect.
    // There are so many corner cases with various combinations of opens and closes that
    // an additional counter on top of seqNum would be necessary to handle them all.
    RegionLocations updatedLocations = oldLocations.updateLocation(location, false, force);
    if (oldLocations != updatedLocations) {
        boolean replaced = tableLocations.replace(startKey, oldLocations, updatedLocations);
        if (replaced && LOG.isTraceEnabled()) {
            LOG.trace("Changed cached location to: " + location);
        }
        addToCachedServers(updatedLocations);
    }
}

Example 33 with HRegionLocation

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

the class RpcRetryingCallerWithReadReplicas method addCallsForReplica.

/**
   * Creates the calls and submit them
   *
   * @param cs  - the completion service to use for submitting
   * @param rl  - the region locations
   * @param min - the id of the first replica, inclusive
   * @param max - the id of the last replica, inclusive.
   */
private void addCallsForReplica(ResultBoundedCompletionService<Result> cs, RegionLocations rl, int min, int max) {
    for (int id = min; id <= max; id++) {
        HRegionLocation hrl = rl.getRegionLocation(id);
        ReplicaRegionServerCallable callOnReplica = new ReplicaRegionServerCallable(id, hrl);
        cs.submit(callOnReplica, operationTimeout, id);
    }
}

Example 34 with HRegionLocation

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

the class ZooKeeperRegistry method getMetaRegionLocation.

@Override
public RegionLocations getMetaRegionLocation() throws IOException {
    ZooKeeperKeepAliveConnection zkw = hci.getKeepAliveZooKeeperWatcher();
    try {
        if (LOG.isTraceEnabled()) {
            LOG.trace("Looking up meta region location in ZK," + " connection=" + this);
        }
        List<ServerName> servers = new MetaTableLocator().blockUntilAvailable(zkw, hci.rpcTimeout, hci.getConfiguration());
        if (LOG.isTraceEnabled()) {
            if (servers == null) {
                LOG.trace("Looked up meta region location, connection=" + this + "; servers = null");
            } else {
                StringBuilder str = new StringBuilder();
                for (ServerName s : servers) {
                    str.append(s.toString());
                    str.append(" ");
                }
                LOG.trace("Looked up meta region location, connection=" + this + "; servers = " + str.toString());
            }
        }
        if (servers == null)
            return null;
        HRegionLocation[] locs = new HRegionLocation[servers.size()];
        int i = 0;
        for (ServerName server : servers) {
            HRegionInfo h = RegionReplicaUtil.getRegionInfoForReplica(HRegionInfo.FIRST_META_REGIONINFO, i);
            if (server == null)
                locs[i++] = null;
            else
                locs[i++] = new HRegionLocation(h, server, 0);
        }
        return new RegionLocations(locs);
    } catch (InterruptedException e) {
        Thread.currentThread().interrupt();
        return null;
    } finally {
        zkw.close();
    }
}

Example 35 with HRegionLocation

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

the class MultiServerCallable method reset.

public void reset(ServerName location, MultiAction multiAction) {
    this.location = new HRegionLocation(null, location);
    this.multiAction = multiAction;
    this.cellBlock = isCellBlock();
}