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HDFS-15351. Blocks scheduled count was wrong on truncate. Contributed by hemanthboyina. 

(cherry picked from commit 719b53a79d)
This commit is contained in:
Inigo Goiri 2020-06-13 09:35:05 -07:00 committed by Wei-Chiu Chuang
parent 02d37c7d22
commit 887948d127
2 changed files with 64 additions and 1 deletions
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9
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
View File

@ -1280,7 +1280,14 @@ public class BlockManager implements BlockStatsMXBean {
neededReconstruction.remove(lastBlock, replicas.liveReplicas(),
replicas.readOnlyReplicas(),
replicas.outOfServiceReplicas(), getExpectedRedundancyNum(lastBlock));
pendingReconstruction.remove(lastBlock);
PendingBlockInfo remove = pendingReconstruction.remove(lastBlock);
if (remove != null) {
List<DatanodeStorageInfo> locations = remove.getTargets();
DatanodeStorageInfo[] removedBlockTargets =
new DatanodeStorageInfo[locations.size()];
locations.toArray(removedBlockTargets);
DatanodeStorageInfo.decrementBlocksScheduled(removedBlockTargets);
}
// remove this block from the list of pending blocks to be deleted.
for (DatanodeStorageInfo storage : targets) {

56
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestBlocksScheduledCounter.java
View File

@ -202,4 +202,60 @@ public class TestBlocksScheduledCounter {
}
}
/**
* Test Block Scheduled counter on truncating a file.
* @throws Exception
*/
@Test
public void testBlocksScheduledCounterOnTruncate() throws Exception {
final Configuration conf = new HdfsConfiguration();
conf.setInt(DFSConfigKeys.DFS_NAMENODE_REDUNDANCY_INTERVAL_SECONDS_KEY, 1);
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(3).build();
cluster.waitActive();
BlockManager bm = cluster.getNamesystem().getBlockManager();
try {
DistributedFileSystem dfs = cluster.getFileSystem();
// 1. stop a datanode
cluster.stopDataNode(0);
// 2. create a file
Path filePath = new Path("/tmp");
DFSTestUtil.createFile(dfs, filePath, 1024, (short) 3, 0L);
DatanodeManager datanodeManager =
cluster.getNamesystem().getBlockManager().getDatanodeManager();
ArrayList<DatanodeDescriptor> dnList =
new ArrayList<DatanodeDescriptor>();
datanodeManager.fetchDatanodes(dnList, dnList, false);
// 3. restart the stopped datanode
cluster.restartDataNode(0);
// 4. disable the heartbeats
for (DataNode dn : cluster.getDataNodes()) {
DataNodeTestUtils.setHeartbeatsDisabledForTests(dn, true);
}
cluster.getNamesystem().writeLock();
try {
BlockManagerTestUtil.computeAllPendingWork(bm);
BlockManagerTestUtil.updateState(bm);
assertEquals(1L, bm.getPendingReconstructionBlocksCount());
} finally {
cluster.getNamesystem().writeUnlock();
}
// 5.truncate the file whose block exists in pending reconstruction
dfs.truncate(filePath, 10);
int blocksScheduled = 0;
for (DatanodeDescriptor descriptor : dnList) {
if (descriptor.getBlocksScheduled() != 0) {
blocksScheduled += descriptor.getBlocksScheduled();
}
}
assertEquals(0, blocksScheduled);
} finally {
cluster.shutdown();
}
}
}