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new 0c9e0b4398a2 HDFS-17456. Fix the incorrect dfsused statistics of
datanode when appending a file. (#6713). Contributed by fuchaohong.
0c9e0b4398a2 is described below
commit 0c9e0b4398a215087fc32e9743d4584d52a1708d
Author: fuchaohong <1783129...@qq.com>
AuthorDate: Tue Apr 30 12:22:53 2024 +0800
HDFS-17456. Fix the incorrect dfsused statistics of datanode when appending
a file. (#6713). Contributed by fuchaohong.
Reviewed-by: ZanderXu <zande...@apache.org>
Signed-off-by: He Xiaoqiao <hexiaoq...@apache.org>
---
.../datanode/fsdataset/impl/FsVolumeImpl.java | 2 ++
.../datanode/fsdataset/impl/TestFsDatasetImpl.java | 42 ++++++++++++++++++++++
2 files changed, 44 insertions(+)
diff --git
a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsVolumeImpl.java
b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsVolumeImpl.java
index 47f0a3556aad..6b026823f19f 100644
---
a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsVolumeImpl.java
+++
b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsVolumeImpl.java
@@ -1291,7 +1291,9 @@ public class FsVolumeImpl implements FsVolumeSpi {
// rename meta file to rbw directory
// rename block file to rbw directory
+ long oldReplicaLength = replicaInfo.getNumBytes() +
replicaInfo.getMetadataLength();
newReplicaInfo.moveReplicaFrom(replicaInfo, newBlkFile);
+ getBlockPoolSlice(bpid).decDfsUsed(oldReplicaLength);
reserveSpaceForReplica(bytesReserved);
return newReplicaInfo;
diff --git
a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/TestFsDatasetImpl.java
b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/TestFsDatasetImpl.java
index 5468473d9de0..dd85ab6328c9 100644
---
a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/TestFsDatasetImpl.java
+++
b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/TestFsDatasetImpl.java
@@ -2102,4 +2102,46 @@ public class TestFsDatasetImpl {
DataNodeFaultInjector.set(oldDnInjector);
}
}
+
+ @Test(timeout = 30000)
+ public void testAppend() {
+ MiniDFSCluster cluster = null;
+ try {
+ cluster = new MiniDFSCluster.Builder(conf)
+ .numDataNodes(1)
+ .storageTypes(new StorageType[]{StorageType.DISK, StorageType.DISK})
+ .storagesPerDatanode(2)
+ .build();
+ FileSystem fs = cluster.getFileSystem();
+ DataNode dataNode = cluster.getDataNodes().get(0);
+
+ // Create test file
+ Path filePath = new Path("testData");
+ FsDatasetImpl fsDataSetImpl = (FsDatasetImpl) dataNode.getFSDataset();
+ DFSTestUtil.createFile(fs, filePath, 100, (short) 1, 0);
+ ExtendedBlock block = DFSTestUtil.getFirstBlock(fs, filePath);
+ ReplicaInfo replicaInfo = fsDataSetImpl.getReplicaInfo(block);
+ long oldMetaLength = replicaInfo.getMetadataLength();
+ long oldDfsUsed = fsDataSetImpl.getDfsUsed();
+
+ // Append to file
+ int appendLength = 100;
+ DFSTestUtil.appendFile(fs, filePath, appendLength);
+
+ block = DFSTestUtil.getFirstBlock(fs, filePath);
+ replicaInfo = fsDataSetImpl.getReplicaInfo(block);
+ long newMetaLength = replicaInfo.getMetadataLength();
+ long newDfsUsed = fsDataSetImpl.getDfsUsed();
+
+ assert newDfsUsed == oldDfsUsed + appendLength + (newMetaLength -
oldMetaLength) :
+ "When appending a file, the dfsused statistics of datanode are
incorrect.";
+ } catch (Exception ex) {
+ LOG.info("Exception in testAppend ", ex);
+ fail("Exception while testing testAppend ");
+ } finally {
+ if (cluster.isClusterUp()) {
+ cluster.shutdown();
+ }
+ }
+ }
}
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