InjectionHandler.processEventIO(InjectionEvent.DATANODE_APPEND_BLOCK);
// Read in the header
long startTime = System.currentTimeMillis();
AppendBlockHeader headerToReceive = new AppendBlockHeader(versionAndOpcode);
headerToReceive.readFields(in);
int namespaceid = headerToReceive.getNamespaceId();
Block block = new Block(headerToReceive.getBlockId(),
headerToReceive.getNumBytes(), headerToReceive.getGenStamp());
if (LOG.isInfoEnabled()) {
if (remoteAddress == null) {