QuotaExceededException, SafeModeException, UnresolvedLinkException,
IOException {
checkBlock(previous);
long fileLength, blockSize;
int replication;
DatanodeDescriptor clientNode = null;
Block newBlock = null;
if(NameNode.stateChangeLog.isDebugEnabled()) {
NameNode.stateChangeLog.debug(
"BLOCK* NameSystem.getAdditionalBlock: file "
+src+" for "+clientName);
}
writeLock();
try {
if (isInSafeMode()) {
throw new SafeModeException("Cannot add block to " + src, safeMode);
}
// have we exceeded the configured limit of fs objects.
checkFsObjectLimit();
INodeFileUnderConstruction pendingFile = checkLease(src, clientName);
// commit the last block and complete it if it has minimum replicas
commitOrCompleteLastBlock(pendingFile, ExtendedBlock.getLocalBlock(previous));
//
// If we fail this, bad things happen!
//
if (!checkFileProgress(pendingFile, false)) {
throw new NotReplicatedYetException("Not replicated yet:" + src);
}
fileLength = pendingFile.computeContentSummary().getLength();
blockSize = pendingFile.getPreferredBlockSize();
clientNode = pendingFile.getClientNode();
replication = (int)pendingFile.getReplication();
} finally {
writeUnlock();
}
// choose targets for the new block to be allocated.
final DatanodeDescriptor targets[] = blockManager.chooseTarget(
src, replication, clientNode, excludedNodes, blockSize);
// Allocate a new block and record it in the INode.
writeLock();
try {