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https://issues.apache.org/jira/browse/HDFS-7606?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14277697#comment-14277697
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Chen He commented on HDFS-7606:
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Do you mean the last element itself returned by diffs.getLast() is "null" ?
> Missing null check in INodeFile#getBlocks()
> -------------------------------------------
>
> Key: HDFS-7606
> URL: https://issues.apache.org/jira/browse/HDFS-7606
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Ted Yu
> Priority: Minor
>
> {code}
> BlockInfo[] snapshotBlocks = diff == null ? getBlocks() :
> diff.getBlocks();
> if(snapshotBlocks != null)
> return snapshotBlocks;
> // Blocks are not in the current snapshot
> // Find next snapshot with blocks present or return current file blocks
> snapshotBlocks = getDiffs().findLaterSnapshotBlocks(diff.getSnapshotId());
> {code}
> If diff is null and snapshotBlocks is null, NullPointerException would result
> from the call to diff.getSnapshotId().
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