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HDFS-15227. NPE if the last block changes from COMMITTED to COMPLETE during FSCK. Contributed by Ayush Saxena.

This commit is contained in:
Ayush Saxena 2020-03-22 11:44:18 +05:30
parent b74e47e31a
commit 62c8015683
1 changed files with 15 additions and 10 deletions
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25
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NamenodeFsck.java
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@ -38,6 +38,7 @@
import java.util.concurrent.ThreadLocalRandom;
import org.apache.commons.io.IOUtils;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockUnderConstructionFeature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.classification.InterfaceAudience;
@ -871,16 +872,20 @@ private void collectBlocksSummary(String parent, HdfsFileStatus file,
String blkName = block.toString();
BlockInfo storedBlock = blockManager.getStoredBlock(
block.getLocalBlock());
DatanodeStorageInfo[] storages = storedBlock
.getUnderConstructionFeature().getExpectedStorageLocations();
report.append('\n')
.append("Under Construction Block:\n")
.append(blockNumber).append(". ").append(blkName)
.append(" len=").append(block.getNumBytes())
.append(" Expected_repl=" + storages.length);
String info=getReplicaInfo(storedBlock);
if (!info.isEmpty()){
report.append(" ").append(info);
BlockUnderConstructionFeature uc =
storedBlock.getUnderConstructionFeature();
if (uc != null) {
// BlockUnderConstructionFeature can be null, in case the block was
// in committed state, and the IBR came just after the check.
DatanodeStorageInfo[] storages = uc.getExpectedStorageLocations();
report.append('\n').append("Under Construction Block:\n")
.append(blockNumber).append(". ").append(blkName).append(" len=")
.append(block.getNumBytes())
.append(" Expected_repl=" + storages.length);
String info = getReplicaInfo(storedBlock);
if (!info.isEmpty()) {
report.append(" ").append(info);
}
}
}