private void onAppend(ChannelHandlerContext ctx) throws IOException {
writeContinueHeader(ctx);
final String nnId = params.namenodeId();
final int bufferSize = params.bufferSize();
DFSClient dfsClient = newDfsClient(nnId, conf);
OutputStream out =
dfsClient.append(path, bufferSize, EnumSet.of(CreateFlag.APPEND), null, null);
DefaultHttpResponse resp = new DefaultHttpResponse(HTTP_1_1, OK);
resp.headers().set(CONTENT_LENGTH, 0);
ctx.pipeline()
.replace(this, HdfsWriter.class.getSimpleName(), new HdfsWriter(dfsClient, out, resp));
}
void handleWrite(
DFSClient dfsClient,
WRITE3Request request,
Channel channel,
int xid,
Nfs3FileAttributes preOpAttr)
throws IOException {
int count = request.getCount();
byte[] data = request.getData().array();
if (data.length < count) {
WRITE3Response response = new WRITE3Response(Nfs3Status.NFS3ERR_INVAL);
Nfs3Utils.writeChannel(channel, response.serialize(new XDR(), xid, new VerifierNone()), xid);
return;
}
FileHandle handle = request.getHandle();
if (LOG.isDebugEnabled()) {
LOG.debug("handleWrite " + request);
}
// Check if there is a stream to write
FileHandle fileHandle = request.getHandle();
OpenFileCtx openFileCtx = fileContextCache.get(fileHandle);
if (openFileCtx == null) {
LOG.info("No opened stream for fileId:" + fileHandle.getFileId());
String fileIdPath = Nfs3Utils.getFileIdPath(fileHandle.getFileId());
HdfsDataOutputStream fos = null;
Nfs3FileAttributes latestAttr = null;
try {
int bufferSize =
config.getInt(
CommonConfigurationKeysPublic.IO_FILE_BUFFER_SIZE_KEY,
CommonConfigurationKeysPublic.IO_FILE_BUFFER_SIZE_DEFAULT);
fos = dfsClient.append(fileIdPath, bufferSize, null, null);
latestAttr = Nfs3Utils.getFileAttr(dfsClient, fileIdPath, iug);
} catch (RemoteException e) {
IOException io = e.unwrapRemoteException();
if (io instanceof AlreadyBeingCreatedException) {
LOG.warn(
"Can't append file:"
+ fileIdPath
+ ". Possibly the file is being closed. Drop the request:"
+ request
+ ", wait for the client to retry...");
return;
}
throw e;
} catch (IOException e) {
LOG.error("Can't apapend to file:" + fileIdPath, e);
if (fos != null) {
fos.close();
}
WccData fileWcc = new WccData(Nfs3Utils.getWccAttr(preOpAttr), preOpAttr);
WRITE3Response response =
new WRITE3Response(
Nfs3Status.NFS3ERR_IO,
fileWcc,
count,
request.getStableHow(),
Nfs3Constant.WRITE_COMMIT_VERF);
Nfs3Utils.writeChannel(
channel, response.serialize(new XDR(), xid, new VerifierNone()), xid);
return;
}
// Add open stream
String writeDumpDir =
config.get(
NfsConfigKeys.DFS_NFS_FILE_DUMP_DIR_KEY, NfsConfigKeys.DFS_NFS_FILE_DUMP_DIR_DEFAULT);
openFileCtx =
new OpenFileCtx(
fos,
latestAttr,
writeDumpDir + "/" + fileHandle.getFileId(),
dfsClient,
iug,
aixCompatMode,
config);
if (!addOpenFileStream(fileHandle, openFileCtx)) {
LOG.info("Can't add new stream. Close it. Tell client to retry.");
try {
fos.close();
} catch (IOException e) {
LOG.error("Can't close stream for fileId:" + handle.getFileId(), e);
}
// Notify client to retry
WccData fileWcc = new WccData(latestAttr.getWccAttr(), latestAttr);
WRITE3Response response =
new WRITE3Response(
Nfs3Status.NFS3ERR_JUKEBOX,
fileWcc,
0,
request.getStableHow(),
Nfs3Constant.WRITE_COMMIT_VERF);
Nfs3Utils.writeChannel(
channel, response.serialize(new XDR(), xid, new VerifierNone()), xid);
return;
}
if (LOG.isDebugEnabled()) {
LOG.debug("Opened stream for appending file:" + fileHandle.getFileId());
}
}
// Add write into the async job queue
openFileCtx.receivedNewWrite(dfsClient, request, channel, xid, asyncDataService, iug);
return;
}