/**
* Connect to the server and set up the I/O streams. It then sends a header to the server and
* starts the connection thread that waits for responses.
*
* @throws java.io.IOException e
*/
protected synchronized void setupIOstreams() throws IOException, InterruptedException {
if (socket != null || shouldCloseConnection.get()) {
return;
}
if (failedServers.isFailedServer(remoteId.getAddress())) {
if (LOG.isDebugEnabled()) {
LOG.debug(
"Not trying to connect to "
+ remoteId.getAddress()
+ " this server is in the failed servers list");
}
IOException e =
new FailedServerException(
"This server is in the failed servers list: " + remoteId.getAddress());
markClosed(e);
close();
throw e;
}
try {
if (LOG.isDebugEnabled()) {
LOG.debug("Connecting to " + remoteId);
}
setupConnection();
this.in =
new DataInputStream(
new BufferedInputStream(new PingInputStream(NetUtils.getInputStream(socket))));
this.out = new DataOutputStream(new BufferedOutputStream(NetUtils.getOutputStream(socket)));
writeHeader();
// update last activity time
touch();
// start the receiver thread after the socket connection has been set up
start();
} catch (IOException e) {
failedServers.addToFailedServers(remoteId.address);
markClosed(e);
close();
throw e;
}
}
/** For {@link TestTransferRbw} */
public static BlockOpResponseProto transferRbw(
final ExtendedBlock b, final DFSClient dfsClient, final DatanodeInfo... datanodes)
throws IOException {
assertEquals(2, datanodes.length);
final Socket s =
DFSOutputStream.createSocketForPipeline(datanodes[0], datanodes.length, dfsClient);
final long writeTimeout = dfsClient.getDatanodeWriteTimeout(datanodes.length);
final DataOutputStream out =
new DataOutputStream(
new BufferedOutputStream(
NetUtils.getOutputStream(s, writeTimeout), HdfsConstants.SMALL_BUFFER_SIZE));
final DataInputStream in = new DataInputStream(NetUtils.getInputStream(s));
// send the request
new Sender(out)
.transferBlock(
b,
new Token<BlockTokenIdentifier>(),
dfsClient.clientName,
new DatanodeInfo[] {datanodes[1]});
out.flush();
return BlockOpResponseProto.parseDelimitedFrom(in);
}
