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Bharat Viswanadham commented on HDFS-12681: ------------------------------------------- [~chris.douglas] Thank You for info. Yes, we have observed it being returning null. {noformat} In the cases we found (though this wasn't exhaustive), clients that used locations requested the locations in the first request (receiving LocatedFileStatus), not using 2 RPCs. {noformat} So, I need to call this makeQualifiedLocated ((LocatedFileStatus) file).makeQualifiedLocated(URI defaultUri,path) and then call ((LocatedFileStatus) file).getBlockLocations(); And now need to remove the code of using {noformat} (file instanceof LocatedFileStatus) {noformat} as now it can't distiniguish whether it needs an RPC call, so we need to directly call fs.getFileBlockLocations? {code:java} As from code comments, it is mentioned /** * This function is used to transform the underlying HDFS LocatedBlocks to * BlockLocations. This method must be invoked before * {@link #getBlockLocations()}. **/ {code} > Fold HdfsLocatedFileStatus into HdfsFileStatus > ---------------------------------------------- > > Key: HDFS-12681 > URL: https://issues.apache.org/jira/browse/HDFS-12681 > Project: Hadoop HDFS > Issue Type: Bug > Reporter: Chris Douglas > Assignee: Chris Douglas > Priority: Minor > Fix For: 3.1.0 > > Attachments: HDFS-12681.00.patch, HDFS-12681.01.patch, > HDFS-12681.02.patch, HDFS-12681.03.patch, HDFS-12681.04.patch, > HDFS-12681.05.patch, HDFS-12681.06.patch, HDFS-12681.07.patch, > HDFS-12681.08.patch, HDFS-12681.09.patch, HDFS-12681.10.patch > > > {{HdfsLocatedFileStatus}} is a subtype of {{HdfsFileStatus}}, but not of > {{LocatedFileStatus}}. Conversion requires copying common fields and shedding > unknown data. It would be cleaner and sufficient for {{HdfsFileStatus}} to > extend {{LocatedFileStatus}}. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org