Java Code Examples for org.apache.hadoop.hdfs.BlockReader#close()
The following examples show how to use
org.apache.hadoop.hdfs.BlockReader#close() .
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Example 1
| Source File: NamenodeFsck.java From hadoop with Apache License 2.0 | 4 votes |
|
private void copyBlock(final DFSClient dfs, LocatedBlock lblock,
OutputStream fos) throws Exception {
int failures = 0;
InetSocketAddress targetAddr = null;
TreeSet<DatanodeInfo> deadNodes = new TreeSet<DatanodeInfo>();
BlockReader blockReader = null;
ExtendedBlock block = lblock.getBlock();
while (blockReader == null) {
DatanodeInfo chosenNode;
try {
chosenNode = bestNode(dfs, lblock.getLocations(), deadNodes);
targetAddr = NetUtils.createSocketAddr(chosenNode.getXferAddr());
} catch (IOException ie) {
if (failures >= DFSConfigKeys.DFS_CLIENT_MAX_BLOCK_ACQUIRE_FAILURES_DEFAULT) {
throw new IOException("Could not obtain block " + lblock, ie);
}
LOG.info("Could not obtain block from any node: " + ie);
try {
Thread.sleep(10000);
} catch (InterruptedException iex) {
}
deadNodes.clear();
failures++;
continue;
}
try {
String file = BlockReaderFactory.getFileName(targetAddr,
block.getBlockPoolId(), block.getBlockId());
blockReader = new BlockReaderFactory(dfs.getConf()).
setFileName(file).
setBlock(block).
setBlockToken(lblock.getBlockToken()).
setStartOffset(0).
setLength(-1).
setVerifyChecksum(true).
setClientName("fsck").
setDatanodeInfo(chosenNode).
setInetSocketAddress(targetAddr).
setCachingStrategy(CachingStrategy.newDropBehind()).
setClientCacheContext(dfs.getClientContext()).
setConfiguration(namenode.conf).
setRemotePeerFactory(new RemotePeerFactory() {
@Override
public Peer newConnectedPeer(InetSocketAddress addr,
Token<BlockTokenIdentifier> blockToken, DatanodeID datanodeId)
throws IOException {
Peer peer = null;
Socket s = NetUtils.getDefaultSocketFactory(conf).createSocket();
try {
s.connect(addr, HdfsServerConstants.READ_TIMEOUT);
s.setSoTimeout(HdfsServerConstants.READ_TIMEOUT);
peer = TcpPeerServer.peerFromSocketAndKey(
dfs.getSaslDataTransferClient(), s, NamenodeFsck.this,
blockToken, datanodeId);
} finally {
if (peer == null) {
IOUtils.closeQuietly(s);
}
}
return peer;
}
}).
build();
} catch (IOException ex) {
// Put chosen node into dead list, continue
LOG.info("Failed to connect to " + targetAddr + ":" + ex);
deadNodes.add(chosenNode);
}
}
byte[] buf = new byte[1024];
int cnt = 0;
boolean success = true;
long bytesRead = 0;
try {
while ((cnt = blockReader.read(buf, 0, buf.length)) > 0) {
fos.write(buf, 0, cnt);
bytesRead += cnt;
}
if ( bytesRead != block.getNumBytes() ) {
throw new IOException("Recorded block size is " + block.getNumBytes() +
", but datanode returned " +bytesRead+" bytes");
}
} catch (Exception e) {
LOG.error("Error reading block", e);
success = false;
} finally {
blockReader.close();
}
if (!success) {
throw new Exception("Could not copy block data for " + lblock.getBlock());
}
}
Example 2
| Source File: TestBlockTokenWithDFS.java From hadoop with Apache License 2.0 | 4 votes |
|
private static void tryRead(final Configuration conf, LocatedBlock lblock,
boolean shouldSucceed) {
InetSocketAddress targetAddr = null;
IOException ioe = null;
BlockReader blockReader = null;
ExtendedBlock block = lblock.getBlock();
try {
DatanodeInfo[] nodes = lblock.getLocations();
targetAddr = NetUtils.createSocketAddr(nodes[0].getXferAddr());
blockReader = new BlockReaderFactory(new DFSClient.Conf(conf)).
setFileName(BlockReaderFactory.getFileName(targetAddr,
"test-blockpoolid", block.getBlockId())).
setBlock(block).
setBlockToken(lblock.getBlockToken()).
setInetSocketAddress(targetAddr).
setStartOffset(0).
setLength(-1).
setVerifyChecksum(true).
setClientName("TestBlockTokenWithDFS").
setDatanodeInfo(nodes[0]).
setCachingStrategy(CachingStrategy.newDefaultStrategy()).
setClientCacheContext(ClientContext.getFromConf(conf)).
setConfiguration(conf).
setRemotePeerFactory(new RemotePeerFactory() {
@Override
public Peer newConnectedPeer(InetSocketAddress addr,
Token<BlockTokenIdentifier> blockToken, DatanodeID datanodeId)
throws IOException {
Peer peer = null;
Socket sock = NetUtils.getDefaultSocketFactory(conf).createSocket();
try {
sock.connect(addr, HdfsServerConstants.READ_TIMEOUT);
sock.setSoTimeout(HdfsServerConstants.READ_TIMEOUT);
peer = TcpPeerServer.peerFromSocket(sock);
} finally {
if (peer == null) {
IOUtils.closeSocket(sock);
}
}
return peer;
}
}).
build();
} catch (IOException ex) {
ioe = ex;
} finally {
if (blockReader != null) {
try {
blockReader.close();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
if (shouldSucceed) {
Assert.assertNotNull("OP_READ_BLOCK: access token is invalid, "
+ "when it is expected to be valid", blockReader);
} else {
Assert.assertNotNull("OP_READ_BLOCK: access token is valid, "
+ "when it is expected to be invalid", ioe);
Assert.assertTrue(
"OP_READ_BLOCK failed due to reasons other than access token: ",
ioe instanceof InvalidBlockTokenException);
}
}
Example 3
| Source File: TestDataNodeVolumeFailure.java From hadoop with Apache License 2.0 | 4 votes |
|
/**
* try to access a block on a data node. If fails - throws exception
* @param datanode
* @param lblock
* @throws IOException
*/
private void accessBlock(DatanodeInfo datanode, LocatedBlock lblock)
throws IOException {
InetSocketAddress targetAddr = null;
ExtendedBlock block = lblock.getBlock();
targetAddr = NetUtils.createSocketAddr(datanode.getXferAddr());
BlockReader blockReader = new BlockReaderFactory(new DFSClient.Conf(conf)).
setInetSocketAddress(targetAddr).
setBlock(block).
setFileName(BlockReaderFactory.getFileName(targetAddr,
"test-blockpoolid", block.getBlockId())).
setBlockToken(lblock.getBlockToken()).
setStartOffset(0).
setLength(-1).
setVerifyChecksum(true).
setClientName("TestDataNodeVolumeFailure").
setDatanodeInfo(datanode).
setCachingStrategy(CachingStrategy.newDefaultStrategy()).
setClientCacheContext(ClientContext.getFromConf(conf)).
setConfiguration(conf).
setRemotePeerFactory(new RemotePeerFactory() {
@Override
public Peer newConnectedPeer(InetSocketAddress addr,
Token<BlockTokenIdentifier> blockToken, DatanodeID datanodeId)
throws IOException {
Peer peer = null;
Socket sock = NetUtils.getDefaultSocketFactory(conf).createSocket();
try {
sock.connect(addr, HdfsServerConstants.READ_TIMEOUT);
sock.setSoTimeout(HdfsServerConstants.READ_TIMEOUT);
peer = TcpPeerServer.peerFromSocket(sock);
} finally {
if (peer == null) {
IOUtils.closeSocket(sock);
}
}
return peer;
}
}).
build();
blockReader.close();
}
Example 4
| Source File: NamenodeFsck.java From big-c with Apache License 2.0 | 4 votes |
|
private void copyBlock(final DFSClient dfs, LocatedBlock lblock,
OutputStream fos) throws Exception {
int failures = 0;
InetSocketAddress targetAddr = null;
TreeSet<DatanodeInfo> deadNodes = new TreeSet<DatanodeInfo>();
BlockReader blockReader = null;
ExtendedBlock block = lblock.getBlock();
while (blockReader == null) {
DatanodeInfo chosenNode;
try {
chosenNode = bestNode(dfs, lblock.getLocations(), deadNodes);
targetAddr = NetUtils.createSocketAddr(chosenNode.getXferAddr());
} catch (IOException ie) {
if (failures >= DFSConfigKeys.DFS_CLIENT_MAX_BLOCK_ACQUIRE_FAILURES_DEFAULT) {
throw new IOException("Could not obtain block " + lblock, ie);
}
LOG.info("Could not obtain block from any node: " + ie);
try {
Thread.sleep(10000);
} catch (InterruptedException iex) {
}
deadNodes.clear();
failures++;
continue;
}
try {
String file = BlockReaderFactory.getFileName(targetAddr,
block.getBlockPoolId(), block.getBlockId());
blockReader = new BlockReaderFactory(dfs.getConf()).
setFileName(file).
setBlock(block).
setBlockToken(lblock.getBlockToken()).
setStartOffset(0).
setLength(-1).
setVerifyChecksum(true).
setClientName("fsck").
setDatanodeInfo(chosenNode).
setInetSocketAddress(targetAddr).
setCachingStrategy(CachingStrategy.newDropBehind()).
setClientCacheContext(dfs.getClientContext()).
setConfiguration(namenode.conf).
setRemotePeerFactory(new RemotePeerFactory() {
@Override
public Peer newConnectedPeer(InetSocketAddress addr,
Token<BlockTokenIdentifier> blockToken, DatanodeID datanodeId)
throws IOException {
Peer peer = null;
Socket s = NetUtils.getDefaultSocketFactory(conf).createSocket();
try {
s.connect(addr, HdfsServerConstants.READ_TIMEOUT);
s.setSoTimeout(HdfsServerConstants.READ_TIMEOUT);
peer = TcpPeerServer.peerFromSocketAndKey(
dfs.getSaslDataTransferClient(), s, NamenodeFsck.this,
blockToken, datanodeId);
} finally {
if (peer == null) {
IOUtils.closeQuietly(s);
}
}
return peer;
}
}).
build();
} catch (IOException ex) {
// Put chosen node into dead list, continue
LOG.info("Failed to connect to " + targetAddr + ":" + ex);
deadNodes.add(chosenNode);
}
}
byte[] buf = new byte[1024];
int cnt = 0;
boolean success = true;
long bytesRead = 0;
try {
while ((cnt = blockReader.read(buf, 0, buf.length)) > 0) {
fos.write(buf, 0, cnt);
bytesRead += cnt;
}
if ( bytesRead != block.getNumBytes() ) {
throw new IOException("Recorded block size is " + block.getNumBytes() +
", but datanode returned " +bytesRead+" bytes");
}
} catch (Exception e) {
LOG.error("Error reading block", e);
success = false;
} finally {
blockReader.close();
}
if (!success) {
throw new Exception("Could not copy block data for " + lblock.getBlock());
}
}
Example 5
| Source File: TestBlockTokenWithDFS.java From big-c with Apache License 2.0 | 4 votes |
|
private static void tryRead(final Configuration conf, LocatedBlock lblock,
boolean shouldSucceed) {
InetSocketAddress targetAddr = null;
IOException ioe = null;
BlockReader blockReader = null;
ExtendedBlock block = lblock.getBlock();
try {
DatanodeInfo[] nodes = lblock.getLocations();
targetAddr = NetUtils.createSocketAddr(nodes[0].getXferAddr());
blockReader = new BlockReaderFactory(new DFSClient.Conf(conf)).
setFileName(BlockReaderFactory.getFileName(targetAddr,
"test-blockpoolid", block.getBlockId())).
setBlock(block).
setBlockToken(lblock.getBlockToken()).
setInetSocketAddress(targetAddr).
setStartOffset(0).
setLength(-1).
setVerifyChecksum(true).
setClientName("TestBlockTokenWithDFS").
setDatanodeInfo(nodes[0]).
setCachingStrategy(CachingStrategy.newDefaultStrategy()).
setClientCacheContext(ClientContext.getFromConf(conf)).
setConfiguration(conf).
setRemotePeerFactory(new RemotePeerFactory() {
@Override
public Peer newConnectedPeer(InetSocketAddress addr,
Token<BlockTokenIdentifier> blockToken, DatanodeID datanodeId)
throws IOException {
Peer peer = null;
Socket sock = NetUtils.getDefaultSocketFactory(conf).createSocket();
try {
sock.connect(addr, HdfsServerConstants.READ_TIMEOUT);
sock.setSoTimeout(HdfsServerConstants.READ_TIMEOUT);
peer = TcpPeerServer.peerFromSocket(sock);
} finally {
if (peer == null) {
IOUtils.closeSocket(sock);
}
}
return peer;
}
}).
build();
} catch (IOException ex) {
ioe = ex;
} finally {
if (blockReader != null) {
try {
blockReader.close();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
if (shouldSucceed) {
Assert.assertNotNull("OP_READ_BLOCK: access token is invalid, "
+ "when it is expected to be valid", blockReader);
} else {
Assert.assertNotNull("OP_READ_BLOCK: access token is valid, "
+ "when it is expected to be invalid", ioe);
Assert.assertTrue(
"OP_READ_BLOCK failed due to reasons other than access token: ",
ioe instanceof InvalidBlockTokenException);
}
}
Example 6
| Source File: TestDataNodeVolumeFailure.java From big-c with Apache License 2.0 | 4 votes |
|
/**
* try to access a block on a data node. If fails - throws exception
* @param datanode
* @param lblock
* @throws IOException
*/
private void accessBlock(DatanodeInfo datanode, LocatedBlock lblock)
throws IOException {
InetSocketAddress targetAddr = null;
ExtendedBlock block = lblock.getBlock();
targetAddr = NetUtils.createSocketAddr(datanode.getXferAddr());
BlockReader blockReader = new BlockReaderFactory(new DFSClient.Conf(conf)).
setInetSocketAddress(targetAddr).
setBlock(block).
setFileName(BlockReaderFactory.getFileName(targetAddr,
"test-blockpoolid", block.getBlockId())).
setBlockToken(lblock.getBlockToken()).
setStartOffset(0).
setLength(-1).
setVerifyChecksum(true).
setClientName("TestDataNodeVolumeFailure").
setDatanodeInfo(datanode).
setCachingStrategy(CachingStrategy.newDefaultStrategy()).
setClientCacheContext(ClientContext.getFromConf(conf)).
setConfiguration(conf).
setRemotePeerFactory(new RemotePeerFactory() {
@Override
public Peer newConnectedPeer(InetSocketAddress addr,
Token<BlockTokenIdentifier> blockToken, DatanodeID datanodeId)
throws IOException {
Peer peer = null;
Socket sock = NetUtils.getDefaultSocketFactory(conf).createSocket();
try {
sock.connect(addr, HdfsServerConstants.READ_TIMEOUT);
sock.setSoTimeout(HdfsServerConstants.READ_TIMEOUT);
peer = TcpPeerServer.peerFromSocket(sock);
} finally {
if (peer == null) {
IOUtils.closeSocket(sock);
}
}
return peer;
}
}).
build();
blockReader.close();
}
