/** Test that that writes to an incomplete block are available to a reader */
public void testUnfinishedBlockRead() throws IOException {
// create a new file in the root, write data, do no close
Path file1 = new Path("/unfinished-block");
FSDataOutputStream stm = TestFileCreation.createFile(fileSystem, file1, 1);
// write partial block and sync
int partialBlockSize = blockSize / 2;
writeFileAndSync(stm, partialBlockSize);
// Make sure a client can read it before it is closed
checkCanRead(fileSystem, file1, partialBlockSize);
stm.close();
}
/**
* test case: if the BlockSender decides there is only one packet to send, the previous
* computation of the pktSize based on transferToAllowed would result in too small a buffer to do
* the buffer-copy needed for partial chunks.
*/
public void testUnfinishedBlockPacketBufferOverrun() throws IOException {
// check that / exists
Path path = new Path("/");
System.out.println("Path : \"" + path.toString() + "\"");
// create a new file in the root, write data, do no close
Path file1 = new Path("/unfinished-block");
final FSDataOutputStream stm = TestFileCreation.createFile(fileSystem, file1, 1);
// write partial block and sync
final int bytesPerChecksum = conf.getInt("io.bytes.per.checksum", 512);
final int partialBlockSize = bytesPerChecksum - 1;
writeFileAndSync(stm, partialBlockSize);
// Make sure a client can read it before it is closed
checkCanRead(fileSystem, file1, partialBlockSize);
stm.close();
}