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HDFS-13155. BlockPlacementPolicyDefault.chooseTargetInOrder Not Checking Return Value for NULL. Contributed by Zsolt Venczel.

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This commit is contained in:
Wei-Chiu Chuang 2018-06-04 07:02:05 -07:00
parent 9efb4b7db0
commit bccdfeee0a
1 changed files with 7 additions and 3 deletions
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockPlacementPolicyDefault.java
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@ -485,9 +485,13 @@ protected Node chooseTargetInOrder(int numOfReplicas,
throws NotEnoughReplicasException {
final int numOfResults = results.size();
if (numOfResults == 0) {
writer = chooseLocalStorage(writer, excludedNodes, blocksize,
maxNodesPerRack, results, avoidStaleNodes, storageTypes, true)
.getDatanodeDescriptor();
DatanodeStorageInfo storageInfo = chooseLocalStorage(writer,
excludedNodes, blocksize, maxNodesPerRack, results, avoidStaleNodes,
storageTypes, true);
writer = (storageInfo != null) ? storageInfo.getDatanodeDescriptor()
: null;
if (--numOfReplicas == 0) {
return writer;
}