public void testAbandonBlock() throws IOException {
MiniDFSCluster cluster = new MiniDFSCluster(CONF, 2, true, null);
FileSystem fs = cluster.getFileSystem();
String src = FILE_NAME_PREFIX + "foo";
FSDataOutputStream fout = null;
try {
// start writing a a file but not close it
fout = fs.create(new Path(src), true, 4096, (short) 1, 512L);
for (int i = 0; i < 1024; i++) {
fout.write(123);
}
fout.sync();
// try reading the block by someone
final DFSClient dfsclient = new DFSClient(NameNode.getAddress(CONF), CONF);
LocatedBlocks blocks = dfsclient.namenode.getBlockLocations(src, 0, 1);
LocatedBlock b = blocks.get(0);
try {
dfsclient.namenode.abandonBlock(b.getBlock(), src, "someone");
// previous line should throw an exception.
assertTrue(false);
} catch (IOException ioe) {
LOG.info("GREAT! " + StringUtils.stringifyException(ioe));
}
} finally {
try {
fout.close();
} catch (Exception e) {
}
try {
fs.close();
} catch (Exception e) {
}
try {
cluster.shutdown();
} catch (Exception e) {
}
}
}
/** Make sure that the quota is decremented correctly when a block is abandoned */
public void testQuotaUpdatedWhenBlockAbandoned() throws IOException {
MiniDFSCluster cluster = new MiniDFSCluster(CONF, 2, true, null);
FileSystem fs = cluster.getFileSystem();
DistributedFileSystem dfs = (DistributedFileSystem) fs;
try {
// Setting diskspace quota to 3MB
dfs.setQuota(new Path("/"), FSConstants.QUOTA_DONT_SET, 3 * 1024 * 1024);
// Start writing a file with 2 replicas to ensure each datanode has one.
// Block Size is 1MB.
String src = FILE_NAME_PREFIX + "test_quota1";
FSDataOutputStream fout = fs.create(new Path(src), true, 4096, (short) 2, 1024 * 1024);
for (int i = 0; i < 1024; i++) {
fout.writeByte(123);
}
// Shutdown one datanode, causing the block abandonment.
cluster.getDataNodes().get(0).shutdown();
// Close the file, new block will be allocated with 2MB pending size.
try {
fout.close();
} catch (QuotaExceededException e) {
fail("Unexpected quota exception when closing fout");
}
} finally {
try {
fs.close();
} catch (Exception e) {
}
try {
cluster.shutdown();
} catch (Exception e) {
}
}
}