ZanderXu created HDFS-16717:
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Summary: Replace NPE with IOException in DataNode.class
Key: HDFS-16717
URL: https://issues.apache.org/jira/browse/HDFS-16717
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: ZanderXu
Assignee: ZanderXu
In current logic, if storage not yet initialized, it will throw a NPE in
DataNode.class. Developers or SREs are very sensitive to NPE, so I feel that we
can use IOException instead of NPE when storage not yet initialized.
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