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ASF GitHub Bot logged work on HADOOP-17686: ------------------------------------------- Author: ASF GitHub Bot Created on: 09/May/21 13:49 Start Date: 09/May/21 13:49 Worklog Time Spent: 10m Work Description: Hexiaoqiao commented on pull request #2990: URL: https://github.com/apache/hadoop/pull/2990#issuecomment-835811563 Thanks @virajjasani involve me here but sorry that I am not familiar with hadoop-huaweicloud module. I think @brahmareddybattula may be more proper to review for this improvement. Thanks. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org Issue Time Tracking ------------------- Worklog Id: (was: 593776) Time Spent: 1h (was: 50m) > Potential NPE in org.apache.hadoop.fs.obs > ----------------------------------------- > > Key: HADOOP-17686 > URL: https://issues.apache.org/jira/browse/HADOOP-17686 > Project: Hadoop Common > Issue Type: Bug > Components: fs > Reporter: Error Reporter > Assignee: Viraj Jasani > Priority: Major > Labels: pull-request-available > Time Spent: 1h > Remaining Estimate: 0h > > Hello, > Our code analyses found a following potential NPE: > > {code:java} > public Path getParent() { > String path = uri.getPath(); > int lastSlash = path.lastIndexOf('/'); > int start = startPositionWithoutWindowsDrive(path); > if ((path.length() == start) || // empty path > (lastSlash == start && path.length() == start+1)) { // at root > return null; <--- Null returned > } > {code} > > {code:java} > private static void getDirectories(final String key, final String sourceKey, > final Set<String> directories) { > Path p = new Path(key); > Path sourcePath = new Path(sourceKey); > // directory must add first > if (key.endsWith("/") && p.compareTo(sourcePath) > 0) { > directories.add(p.toString()); > } > while (p.compareTo(sourcePath) > 0) { > p = p.getParent(); <--- NPE > if (p.isRoot() || p.compareTo(sourcePath) == 0) { > break; > } > {code} > Given a root path, it will lead to NPE at method getDirectories > > Full trace: > > 1. Return null to caller > [https://github.com/apache/hadoop/blob/f40e3eb0590f85bb42d2471992bf5d524628fdd6/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/Path.java#L432] > 2. Function getParent executes and returns > [https://github.com/apache/hadoop/blob/f40e3eb0590f85bb42d2471992bf5d524628fdd6/hadoop-cloud-storage-project/hadoop-huaweicloud/src/main/java/org/apache/hadoop/fs/obs/OBSObjectBucketUtils.java#L875] > 3. The return value of function getParent is passed as the this pointer to > function isRoot (the return value of function getParent can be null) > [https://github.com/apache/hadoop/blob/f40e3eb0590f85bb42d2471992bf5d524628fdd6/hadoop-cloud-storage-project/hadoop-huaweicloud/src/main/java/org/apache/hadoop/fs/obs/OBSObjectBucketUtils.java#L876] > Commit: f40e3eb0590f85bb42d2471992bf5d524628fdd6 -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org