How to use

createRbwFile

method

in

org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.BlockPoolSlice

/**
 * RBW files. They get moved to the finalized block directory when
 * the block is finalized.
 */
File createRbwFile(String bpid, Block b) throws IOException {
 checkReference();
 reserveSpaceForReplica(b.getNumBytes());
 try {
  return getBlockPoolSlice(bpid).createRbwFile(b);
 } catch (IOException exception) {
  releaseReservedSpace(b.getNumBytes());
  throw exception;
 }
}

/**
 * RBW files. They get moved to the finalized block directory when
 * the block is finalized.
 */
File createRbwFile(String bpid, Block b) throws IOException {
 checkReference();
 reserveSpaceForRbw(b.getNumBytes());
 try {
  return getBlockPoolSlice(bpid).createRbwFile(b);
 } catch (IOException exception) {
  releaseReservedSpace(b.getNumBytes());
  throw exception;
 }
}

/**
 * RBW files. They get moved to the finalized block directory when
 * the block is finalized.
 */
File createRbwFile(String bpid, Block b) throws IOException {
 checkReference();
 reserveSpaceForRbw(b.getNumBytes());
 try {
  return getBlockPoolSlice(bpid).createRbwFile(b);
 } catch (IOException exception) {
  releaseReservedSpace(b.getNumBytes());
  throw exception;
 }
}

Mockito.when(blockPoolSlice.createRbwFile((Block) Mockito.any()))
  .thenThrow(new IOException("Synthetic IO Exception Throgh MOCK"));