Examples of org.apache.cassandra.thrift.UnavailableException

org.apache.cassandra.thrift.UnavailableException
Not all the replicas required could be created and/or read.

                }
                builder.append("] are insufficient to satisfy LOCAL_QUORUM requirement of ").append(blockfor).append(" live nodes in '").append(localdc).append("'");
                logger.debug(builder.toString());
            }


            throw new UnavailableException();
        }
    }

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    private static InetAddress findSuitableEndpoint(String table, ByteBuffer key, String localDataCenter) throws UnavailableException
    {
        IEndpointSnitch snitch = DatabaseDescriptor.getEndpointSnitch();
        List<InetAddress> endpoints = StorageService.instance.getLiveNaturalEndpoints(table, key);
        if (endpoints.isEmpty())
            throw new UnavailableException();


        List<InetAddress> localEndpoints = new ArrayList<InetAddress>();
        for (InetAddress endpoint : endpoints)
        {
            if (snitch.getDatacenter(endpoint).equals(localDataCenter))

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     */
    public static List<Row> read(List<ReadCommand> commands, ConsistencyLevel consistency_level)
            throws IOException, UnavailableException, TimeoutException, InvalidRequestException
    {
        if (StorageService.instance.isBootstrapMode())
            throw new UnavailableException();
        long startTime = System.nanoTime();
        List<Row> rows;
        try
        {
            rows = fetchRows(commands, consistency_level);

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        {
            logger.info("Cannot perform truncate, some hosts are down");
            // Since the truncate operation is so aggressive and is typically only
            // invoked by an admin, for simplicity we require that all nodes are up
            // to perform the operation.
            throw new UnavailableException();
        }


        Set<InetAddress> allEndpoints = Gossiper.instance.getLiveMembers();
        int blockFor = allEndpoints.size();
        final TruncateResponseHandler responseHandler = new TruncateResponseHandler(blockFor);

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    {
        if (endpoints.size() < blockfor)
        {
            logger.debug("Live nodes {} do not satisfy ConsistencyLevel ({} required)",
                         StringUtils.join(endpoints, ", "), blockfor);
            throw new UnavailableException();
        }
    }

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        for (InetAddress endpoint : endpoints)
        {
            if (FailureDetector.instance.isAlive(endpoint))
                return endpoint;
        }
        throw new UnavailableException(); // no nodes that could contain key are alive
    }

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    {
        if (consistencyLevel == ConsistencyLevel.ANY)
        {
            // ensure there are blockFor distinct living nodes (hints are ok).
            if (hintedEndpoints.keySet().size() < blockFor)
                throw new UnavailableException();
        }


        // count destinations that are part of the desired target set
        int liveNodes = 0;
        for (InetAddress destination : hintedEndpoints.keySet())
        {
            if (writeEndpoints.contains(destination))
                liveNodes++;
        }
        if (liveNodes < blockFor)
        {
            throw new UnavailableException();
        }
    }

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            InetAddress dataPoint = StorageService.instance.findSuitableEndPoint(command.table, command.key);
            List<InetAddress> endpointList = StorageService.instance.getLiveNaturalEndpoints(command.table, command.key);
            final String table = command.table;
            int responseCount = determineBlockFor(DatabaseDescriptor.getReplicationFactor(table), consistency_level);
            if (endpointList.size() < responseCount)
                throw new UnavailableException();


            InetAddress[] endPoints = new InetAddress[endpointList.size()];
            Message messages[] = new Message[endpointList.size()];
            // data-request message is sent to dataPoint, the node that will actually get
            // the data for us. The other replicas are only sent a digest query.

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        List<Row> rows = new ArrayList<Row>(command.max_keys);
        for (AbstractBounds range : ranges)
        {
            List<InetAddress> liveEndpoints = StorageService.instance.getLiveNaturalEndpoints(command.keyspace, range.right);
            if (liveEndpoints.size() < responseCount)
                throw new UnavailableException();
            DatabaseDescriptor.getEndPointSnitch(command.keyspace).sortByProximity(FBUtilities.getLocalAddress(), liveEndpoints);
            List<InetAddress> endpoints = liveEndpoints.subList(0, responseCount);


            RangeSliceCommand c2 = new RangeSliceCommand(command.keyspace, command.column_family, command.super_column, command.predicate, range, command.max_keys);
            Message message = c2.getMessage();

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                liveNodes++;
        }


        if (liveNodes < responses.get())
        {
            throw new UnavailableException();
        }
    }

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Related Classes of org.apache.cassandra.thrift.UnavailableException

org.apache.cassandra.cql3.statements.TruncateStatement

org.apache.cassandra.service.DatacenterQuorumResponseHandler

org.apache.cassandra.service.DatacenterReadCallback

org.apache.cassandra.service.DatacenterSyncWriteResponseHandler

org.apache.cassandra.service.DatacenterWriteResponseHandler

org.apache.cassandra.service.QuorumResponseHandler

org.apache.cassandra.service.ReadCallback

org.apache.cassandra.service.StorageProxy

org.apache.cassandra.service.StorageService

org.apache.cassandra.service.WriteResponseHandler

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