Examples with RPCErrorResponse alluxio.network.protocol.RPCErrorResponse used on opensource projects

Example 6 with RPCErrorResponse

use of alluxio.network.protocol.RPCErrorResponse in project alluxio by Alluxio.

the class NettyRemoteBlockReader method readRemoteBlock.

@Override
public ByteBuffer readRemoteBlock(InetSocketAddress address, long blockId, long offset, long length, long lockId, long sessionId) throws IOException {
    Channel channel = null;
    ClientHandler clientHandler = null;
    Metrics.NETTY_BLOCK_READ_OPS.inc();
    try {
        channel = mContext.acquireNettyChannel(address);
        if (!(channel.pipeline().last() instanceof ClientHandler)) {
            channel.pipeline().addLast(new ClientHandler());
        }
        clientHandler = (ClientHandler) channel.pipeline().last();
        SingleResponseListener listener = new SingleResponseListener();
        clientHandler.addListener(listener);
        ChannelFuture channelFuture = channel.writeAndFlush(new RPCBlockReadRequest(blockId, offset, length, lockId, sessionId));
        channelFuture = channelFuture.sync();
        if (channelFuture.isDone() && !channelFuture.isSuccess()) {
            LOG.error("Failed to write to %s for block %d with error %s.", address.toString(), blockId, channelFuture.cause());
            throw new IOException(channelFuture.cause());
        }
        RPCResponse response = listener.get(NettyClient.TIMEOUT_MS, TimeUnit.MILLISECONDS);
        switch(response.getType()) {
            case RPC_BLOCK_READ_RESPONSE:
                RPCBlockReadResponse blockResponse = (RPCBlockReadResponse) response;
                LOG.debug("Data {} from remote machine {} received", blockId, address);
                RPCResponse.Status status = blockResponse.getStatus();
                if (status == RPCResponse.Status.SUCCESS) {
                    // always clear the previous response before reading another one
                    close();
                    mReadResponse = blockResponse;
                    return blockResponse.getPayloadDataBuffer().getReadOnlyByteBuffer();
                }
                throw new IOException(status.getMessage() + " response: " + blockResponse);
            case RPC_ERROR_RESPONSE:
                RPCErrorResponse error = (RPCErrorResponse) response;
                throw new IOException(error.getStatus().getMessage());
            default:
                throw new IOException(ExceptionMessage.UNEXPECTED_RPC_RESPONSE.getMessage(response.getType(), RPCMessage.Type.RPC_BLOCK_READ_RESPONSE));
        }
    } catch (Exception e) {
        Metrics.NETTY_BLOCK_READ_FAILURES.inc();
        try {
            if (channel != null) {
                channel.close().sync();
            }
        } catch (InterruptedException ee) {
            throw Throwables.propagate(ee);
        }
        throw new IOException(e);
    } finally {
        if (clientHandler != null) {
            clientHandler.removeListeners();
        }
        if (channel != null) {
            mContext.releaseNettyChannel(address, channel);
        }
    }
}