possible Cases for NullPointerException
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Key: HDFS-2672
URL: https://issues.apache.org/jira/browse/HDFS-2672
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: kavita sharma
Priority: Trivial
NullPointerException can be thrown as null check is not added in DFSClient and
UpgradeManagerNamenode.
{noformat}
DFSClient.java
Block newBlock = primary.getBlockInfo(last.getBlock());
if newBlock comes null then NullPointerException will be thrown.
{noformat}
{noformat}
UpgradeManagerNamenode.java
uos = UpgradeObjectCollection.getDistributedUpgrades(-4,
HdfsConstants.NodeType.NAME_NODE);
if uos will come null then NullPointerException will be thrown.
{noformat}
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