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HDFS-16377. Should CheckNotNull before access FsDatasetSpi (#3784) 

Reviewed-by: Viraj Jasani <vjasani@apache.org>
Signed-off-by: Takanobu Asanuma <tasanuma@apache.org>
This commit is contained in:
litao 2021-12-16 12:49:50 +08:00 committed by GitHub
parent a4557f9ed9
commit 22f5e1885d
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1 changed files with 7 additions and 1 deletions
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8
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java
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@ -865,6 +865,7 @@ private void refreshVolumes(String newVolumes) throws IOException {
.newFixedThreadPool(changedVolumes.newLocations.size());
List<Future<IOException>> exceptions = Lists.newArrayList();
Preconditions.checkNotNull(data, "Storage not yet initialized");
for (final StorageLocation location : changedVolumes.newLocations) {
exceptions.add(service.submit(new Callable<IOException>() {
@Override
@ -964,6 +965,7 @@ private synchronized void removeVolumes(
clearFailure, Joiner.on(",").join(storageLocations)));
IOException ioe = null;
Preconditions.checkNotNull(data, "Storage not yet initialized");
// Remove volumes and block infos from FsDataset.
data.removeVolumes(storageLocations, clearFailure);
@ -2040,6 +2042,7 @@ FileInputStream[] requestShortCircuitFdsForRead(final ExtendedBlock blk,
FileInputStream fis[] = new FileInputStream[2];
try {
Preconditions.checkNotNull(data, "Storage not yet initialized");
fis[0] = (FileInputStream)data.getBlockInputStream(blk, 0);
fis[1] = DatanodeUtil.getMetaDataInputStream(blk, data);
} catch (ClassCastException e) {
@ -3069,6 +3072,7 @@ public static void main(String args[]) {
@Override // InterDatanodeProtocol
public ReplicaRecoveryInfo initReplicaRecovery(RecoveringBlock rBlock)
throws IOException {
Preconditions.checkNotNull(data, "Storage not yet initialized");
return data.initReplicaRecovery(rBlock);
}
@ -3079,6 +3083,7 @@ public ReplicaRecoveryInfo initReplicaRecovery(RecoveringBlock rBlock)
public String updateReplicaUnderRecovery(final ExtendedBlock oldBlock,
final long recoveryId, final long newBlockId, final long newLength)
throws IOException {
Preconditions.checkNotNull(data, "Storage not yet initialized");
final Replica r = data.updateReplicaUnderRecovery(oldBlock,
recoveryId, newBlockId, newLength);
// Notify the namenode of the updated block info. This is important
@ -3360,7 +3365,7 @@ public void deleteBlockPool(String blockPoolId, boolean force)
"The block pool is still running. First do a refreshNamenodes to " +
"shutdown the block pool service");
}
Preconditions.checkNotNull(data, "Storage not yet initialized");
data.deleteBlockPool(blockPoolId, force);
}
@ -3804,6 +3809,7 @@ public String getSlowDisks() {
@Override
public List<DatanodeVolumeInfo> getVolumeReport() throws IOException {
checkSuperuserPrivilege();
Preconditions.checkNotNull(data, "Storage not yet initialized");
Map<String, Object> volumeInfoMap = data.getVolumeInfoMap();
if (volumeInfoMap == null) {
LOG.warn("DataNode volume info not available.");