Examples of org.apache.accumulo.server.master.state.TServerInstance

Package org.apache.accumulo.server.master.state

Examples of org.apache.accumulo.server.master.state.TServerInstance

org.apache.accumulo.server.master.state.TServerInstance
A tablet is assigned to a tablet server at the given address as long as it is alive and well. When the tablet server is restarted, the instance information it advertises will change. Therefore tablet assignments can be considered out-of-date if the tablet server instance information has been changed.

      return null;
    
    if (last != null) {
      // Maintain locality
      String fakeSessionID = " ";
      TServerInstance simple = new TServerInstance(last.getLocation(), fakeSessionID);
      Iterator<TServerInstance> find = locations.tailMap(simple).keySet().iterator();
      if (find.hasNext()) {
        TServerInstance current = find.next();
        if (current.host().equals(last.host()))
          return current;
      }
    }
    
    // The strategy here is to walk through the locations and hand them back, one at a time
    // Grab an iterator off of the set of options; use a new iterator if it hands back something not in the current list.
    if (assignments == null || !assignments.hasNext())
      assignments = randomize(locations.keySet()).iterator();
    TServerInstance result = assignments.next();
    if (!locations.containsKey(result)) {
      assignments = null;
      return randomize(locations.keySet()).iterator().next();
    }
    return result;

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            Iterator<Entry<Key,Value>> row = ri.next();
            long tabletFlushID = -1;
            int logs = 0;
            boolean online = false;
            
            TServerInstance server = null;
            
            Entry<Key,Value> entry = null;
            while (row.hasNext()) {
              entry = row.next();
              Key key = entry.getKey();
              
              if (Constants.METADATA_FLUSH_COLUMN.equals(key.getColumnFamily(), key.getColumnQualifier())) {
                tabletFlushID = Long.parseLong(entry.getValue().toString());
              }
              
              if (Constants.METADATA_LOG_COLUMN_FAMILY.equals(key.getColumnFamily()))
                logs++;
              
              if (Constants.METADATA_CURRENT_LOCATION_COLUMN_FAMILY.equals(key.getColumnFamily())) {
                online = true;
                server = new TServerInstance(entry.getValue(), key.getColumnQualifier());
              }
              
            }
            
            // when tablet is not online and has no logs, there is no reason to wait for it

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    public void shutdownTabletServer(TInfo info, AuthInfo c, String tabletServer, boolean force) throws ThriftSecurityException, TException {
      verify(c, check(c, SystemPermission.SYSTEM));
      
      final InetSocketAddress addr = AddressUtil.parseAddress(tabletServer, Property.TSERV_CLIENTPORT);
      final String addrString = org.apache.accumulo.core.util.AddressUtil.toString(addr);
      final TServerInstance doomed = tserverSet.find(addrString);
      if (!force) {
        final TServerConnection server = tserverSet.getConnection(doomed);
        if (server == null) {
          log.warn("No server found for name " + tabletServer);
          return;

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        if (!tabletEntries.lastKey().equals(extent.getMetadataEntry())) {
          log.warn("Failed to find metadata entry for " + extent + " found " + tabletEntries.lastKey());
          return null;
        }


        TServerInstance future = null;
        Text metadataEntry = extent.getMetadataEntry();
        for (Entry<Key,Value> entry : tabletsKeyValues.entrySet()) {
          Key key = entry.getKey();
          if (!metadataEntry.equals(key.getRow()))
            continue;
          Text cf = key.getColumnFamily();
          if (cf.equals(Constants.METADATA_FUTURE_LOCATION_COLUMN_FAMILY)) {
            future = new TServerInstance(entry.getValue(), key.getColumnQualifier());
          } else if (cf.equals(Constants.METADATA_CURRENT_LOCATION_COLUMN_FAMILY)) {
            log.error("Tablet seems to be already assigned to " + new TServerInstance(entry.getValue(), key.getColumnQualifier()));
            return null;
          }
        }
        if (future == null) {
          log.warn("The master has not assigned " + extent + " to " + instance);

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    String address = getClientAddressString();
    if (address == null)
      return null;


    try {
      return new TServerInstance(address, tabletServerLock.getSessionId());
    } catch (Exception ex) {
      log.warn("Unable to read session from tablet server lock" + ex);
      return null;
    }
  }

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  }
  
  private static TServerInstance lookupLastServer(KeyExtent extent, SortedMap<Key,Value> tabletsKeyValues) {
    for (Entry<Key,Value> entry : tabletsKeyValues.entrySet()) {
      if (entry.getKey().getColumnFamily().compareTo(Constants.METADATA_LAST_LOCATION_COLUMN_FAMILY) == 0) {
        return new TServerInstance(entry.getValue(), entry.getKey().getColumnQualifier());
      }
    }
    return null;
  }

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      // exceptions
      recentlyUnloadedCache.put(extent, System.currentTimeMillis());
      onlineTablets.remove(extent);


      try {
        TServerInstance instance = new TServerInstance(clientAddress, getLock().getSessionId());
        TabletLocationState tls = new TabletLocationState(extent, null, instance, null, null, false);
        log.debug("Unassigning " + tls);
        TabletStateStore.unassign(tls);
      } catch (DistributedStoreException ex) {
        log.warn("Unable to update storage", ex);

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        if (dfv.getNumEntries() == 0) {
          fs.delete(newDatafile, true);
        }
      }
      
      TServerInstance lastLocation = null;
      synchronized (Tablet.this) {
        
        t1 = System.currentTimeMillis();
        
        IZooReaderWriter zoo = ZooReaderWriter.getRetryingInstance();

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    MetadataTable.splitDatafiles(extent.getTableId(), midRow, splitRatio, new HashMap<String,FileUtil.FileInfo>(), mapFiles, lowDatafileSizes,
        highDatafileSizes, highDatafilesToRemove);
    
    MetadataTable.splitTablet(high, extent.getPrevEndRow(), splitRatio, SecurityConstants.getSystemCredentials(), zl);
    TServerInstance instance = new TServerInstance(location, zl.getSessionId());
    Writer writer = new Writer(HdfsZooInstance.getInstance(), SecurityConstants.getSystemCredentials(), Constants.METADATA_TABLE_ID);
    Assignment assignment = new Assignment(high, instance);
    Mutation m = new Mutation(assignment.tablet.getMetadataEntry());
    m.put(Constants.METADATA_FUTURE_LOCATION_COLUMN_FAMILY, assignment.server.asColumnQualifier(), assignment.server.asMutationValue());
    writer.update(m);

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      // taking table offline?
      state = getTableGoalState(extent);
      if (state == TabletGoalState.HOSTED) {
        // Maybe this tablet needs to be migrated
        TServerInstance dest = migrations.get(extent);
        if (dest != null && tls.current != null && !dest.equals(tls.current)) {
          return TabletGoalState.UNASSIGNED;
        }
      }
    }
    return state;

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