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HDFS-7740. Test truncate with DataNodes restarting. (yliu)

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yliu 2015-02-21 06:32:34 +08:00
parent 6f0133039a
commit 737bad02d4
2 changed files with 223 additions and 0 deletions
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2
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -666,6 +666,8 @@ Release 2.7.0 - UNRELEASED
HDFS-7773. Additional metrics in HDFS to be accessed via jmx.
(Anu Engineer via cnauroth)
HDFS-7740. Test truncate with DataNodes restarting. (yliu)
OPTIMIZATIONS
HDFS-7454. Reduce memory footprint for AclEntries in NameNode.

221
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFileTruncate.java
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@ -53,6 +53,7 @@
import org.apache.hadoop.hdfs.protocol.Block;
import org.apache.hadoop.hdfs.protocol.HdfsConstants;
import org.apache.hadoop.hdfs.protocol.HdfsConstants.SafeModeAction;
import org.apache.hadoop.hdfs.protocol.LocatedBlock;
import org.apache.hadoop.hdfs.protocol.LocatedBlocks;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfoContiguousUnderConstruction;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants;
@ -93,6 +94,8 @@ public static void startUp() throws IOException {
conf.setLong(DFSConfigKeys.DFS_NAMENODE_MIN_BLOCK_SIZE_KEY, BLOCK_SIZE);
conf.setInt(DFSConfigKeys.DFS_BYTES_PER_CHECKSUM_KEY, BLOCK_SIZE);
conf.setInt(DFSConfigKeys.DFS_HEARTBEAT_INTERVAL_KEY, SHORT_HEARTBEAT);
conf.setLong(
DFSConfigKeys.DFS_NAMENODE_REPLICATION_PENDING_TIMEOUT_SEC_KEY, 1);
cluster = new MiniDFSCluster.Builder(conf)
.format(true)
.numDataNodes(DATANODE_NUM)
@ -622,6 +625,224 @@ public void testTruncateFailure() throws IOException {
fs.delete(p, false);
}
/**
* The last block is truncated at mid. (non copy-on-truncate)
* dn0 is shutdown before truncate and restart after truncate successful.
*/
@Test(timeout=60000)
public void testTruncateWithDataNodesRestart() throws Exception {
int startingFileSize = 3 * BLOCK_SIZE;
byte[] contents = AppendTestUtil.initBuffer(startingFileSize);
final Path parent = new Path("/test");
final Path p = new Path(parent, "testTruncateWithDataNodesRestart");
writeContents(contents, startingFileSize, p);
LocatedBlock oldBlock = getLocatedBlocks(p).getLastLocatedBlock();
int dn = 0;
int toTruncateLength = 1;
int newLength = startingFileSize - toTruncateLength;
cluster.getDataNodes().get(dn).shutdown();
try {
boolean isReady = fs.truncate(p, newLength);
assertFalse(isReady);
} finally {
cluster.restartDataNode(dn);
cluster.waitActive();
cluster.triggerBlockReports();
}
LocatedBlock newBlock = getLocatedBlocks(p).getLastLocatedBlock();
/*
* For non copy-on-truncate, the truncated block id is the same, but the
* GS should increase.
* We trigger block report for dn0 after it restarts, since the GS
* of replica for the last block on it is old, so the reported last block
* from dn0 should be marked corrupt on nn and the replicas of last block
* on nn should decrease 1, then the truncated block will be replicated
* to dn0.
*/
assertEquals(newBlock.getBlock().getBlockId(),
oldBlock.getBlock().getBlockId());
assertEquals(newBlock.getBlock().getGenerationStamp(),
oldBlock.getBlock().getGenerationStamp() + 1);
checkBlockRecovery(p);
// Wait replicas come to 3
DFSTestUtil.waitReplication(fs, p, REPLICATION);
// Old replica is disregarded and replaced with the truncated one
assertEquals(cluster.getBlockFile(dn, newBlock.getBlock()).length(),
newBlock.getBlockSize());
assertTrue(cluster.getBlockMetadataFile(dn,
newBlock.getBlock()).getName().endsWith(
newBlock.getBlock().getGenerationStamp() + ".meta"));
// Validate the file
FileStatus fileStatus = fs.getFileStatus(p);
assertThat(fileStatus.getLen(), is((long) newLength));
checkFullFile(p, newLength, contents);
fs.delete(parent, true);
}
/**
* The last block is truncated at mid. (copy-on-truncate)
* dn1 is shutdown before truncate and restart after truncate successful.
*/
@Test(timeout=60000)
public void testCopyOnTruncateWithDataNodesRestart() throws Exception {
int startingFileSize = 3 * BLOCK_SIZE;
byte[] contents = AppendTestUtil.initBuffer(startingFileSize);
final Path parent = new Path("/test");
final Path p = new Path(parent, "testCopyOnTruncateWithDataNodesRestart");
writeContents(contents, startingFileSize, p);
LocatedBlock oldBlock = getLocatedBlocks(p).getLastLocatedBlock();
fs.allowSnapshot(parent);
fs.createSnapshot(parent, "ss0");
int dn = 1;
int toTruncateLength = 1;
int newLength = startingFileSize - toTruncateLength;
cluster.getDataNodes().get(dn).shutdown();
try {
boolean isReady = fs.truncate(p, newLength);
assertFalse(isReady);
} finally {
cluster.restartDataNode(dn);
cluster.waitActive();
cluster.triggerBlockReports();
}
LocatedBlock newBlock = getLocatedBlocks(p).getLastLocatedBlock();
/*
* For copy-on-truncate, new block is made with new block id and new GS.
* We trigger block report for dn1 after it restarts. The replicas of
* the new block is 2, and then it will be replicated to dn1.
*/
assertNotEquals(newBlock.getBlock().getBlockId(),
oldBlock.getBlock().getBlockId());
assertEquals(newBlock.getBlock().getGenerationStamp(),
oldBlock.getBlock().getGenerationStamp() + 1);
checkBlockRecovery(p);
// Wait replicas come to 3
DFSTestUtil.waitReplication(fs, p, REPLICATION);
// New block is replicated to dn1
assertEquals(cluster.getBlockFile(dn, newBlock.getBlock()).length(),
newBlock.getBlockSize());
// Old replica exists too since there is snapshot
assertEquals(cluster.getBlockFile(dn, oldBlock.getBlock()).length(),
oldBlock.getBlockSize());
assertTrue(cluster.getBlockMetadataFile(dn,
oldBlock.getBlock()).getName().endsWith(
oldBlock.getBlock().getGenerationStamp() + ".meta"));
// Validate the file
FileStatus fileStatus = fs.getFileStatus(p);
assertThat(fileStatus.getLen(), is((long) newLength));
checkFullFile(p, newLength, contents);
fs.deleteSnapshot(parent, "ss0");
fs.delete(parent, true);
}
/**
* The last block is truncated at mid. (non copy-on-truncate)
* dn0, dn1 are restarted immediately after truncate.
*/
@Test(timeout=60000)
public void testTruncateWithDataNodesRestartImmediately() throws Exception {
int startingFileSize = 3 * BLOCK_SIZE;
byte[] contents = AppendTestUtil.initBuffer(startingFileSize);
final Path parent = new Path("/test");
final Path p = new Path(parent, "testTruncateWithDataNodesRestartImmediately");
writeContents(contents, startingFileSize, p);
LocatedBlock oldBlock = getLocatedBlocks(p).getLastLocatedBlock();
int dn0 = 0;
int dn1 = 1;
int toTruncateLength = 1;
int newLength = startingFileSize - toTruncateLength;
boolean isReady = fs.truncate(p, newLength);
assertFalse(isReady);
cluster.restartDataNode(dn0);
cluster.restartDataNode(dn1);
cluster.waitActive();
cluster.triggerBlockReports();
LocatedBlock newBlock = getLocatedBlocks(p).getLastLocatedBlock();
/*
* For non copy-on-truncate, the truncated block id is the same, but the
* GS should increase.
*/
assertEquals(newBlock.getBlock().getBlockId(),
oldBlock.getBlock().getBlockId());
assertEquals(newBlock.getBlock().getGenerationStamp(),
oldBlock.getBlock().getGenerationStamp() + 1);
checkBlockRecovery(p);
// Wait replicas come to 3
DFSTestUtil.waitReplication(fs, p, REPLICATION);
// Old replica is disregarded and replaced with the truncated one on dn0
assertEquals(cluster.getBlockFile(dn0, newBlock.getBlock()).length(),
newBlock.getBlockSize());
assertTrue(cluster.getBlockMetadataFile(dn0,
newBlock.getBlock()).getName().endsWith(
newBlock.getBlock().getGenerationStamp() + ".meta"));
// Old replica is disregarded and replaced with the truncated one on dn1
assertEquals(cluster.getBlockFile(dn1, newBlock.getBlock()).length(),
newBlock.getBlockSize());
assertTrue(cluster.getBlockMetadataFile(dn1,
newBlock.getBlock()).getName().endsWith(
newBlock.getBlock().getGenerationStamp() + ".meta"));
// Validate the file
FileStatus fileStatus = fs.getFileStatus(p);
assertThat(fileStatus.getLen(), is((long) newLength));
checkFullFile(p, newLength, contents);
fs.delete(parent, true);
}
/**
* The last block is truncated at mid. (non copy-on-truncate)
* shutdown the datanodes immediately after truncate.
*/
@Test(timeout=60000)
public void testTruncateWithDataNodesShutdownImmediately() throws Exception {
int startingFileSize = 3 * BLOCK_SIZE;
byte[] contents = AppendTestUtil.initBuffer(startingFileSize);
final Path parent = new Path("/test");
final Path p = new Path(parent, "testTruncateWithDataNodesShutdownImmediately");
writeContents(contents, startingFileSize, p);
int toTruncateLength = 1;
int newLength = startingFileSize - toTruncateLength;
boolean isReady = fs.truncate(p, newLength);
assertFalse(isReady);
cluster.shutdownDataNodes();
try {
for(int i = 0; i < SUCCESS_ATTEMPTS && cluster.isDataNodeUp(); i++) {
Thread.sleep(SLEEP);
}
assertFalse("All DataNodes should be down.", cluster.isDataNodeUp());
LocatedBlocks blocks = getLocatedBlocks(p);
assertTrue(blocks.isUnderConstruction());
} finally {
cluster.startDataNodes(conf, DATANODE_NUM, true,
StartupOption.REGULAR, null);
cluster.waitActive();
}
fs.delete(parent, true);
}
/**
* EditLogOp load test for Truncate.
*/