Yes Eli, Agree with you. I think we must take a look immediately now.
I just debugged the failure related to this class cast exception. Following is the initial analysis: Previous behaviour of getListing in ClientNamenodeProtocolTranslatorR23 is It will pass needLocation flag as true and server side will be packed empty LocatedBlocks with HdfsLocatedFileStatus object if getBlocations are null and needLocation flag is true. So, cleint will reconstruct the HdfsLocatedFileStatus directly if HdfsfileStatus is instanceOf HdfsLocatedFileStatus. But with new implementation of protocolBuffers, It is just ignoring the LocatedBlocks are server side if the getBlocklocations are null. At client side, to reconstruct the HDFSFileStatus object, it is depending on locations field. Since there is no locations field here, it is considering HDFSFileStatus as just HDFSFileStatus. Here test assumes that HDFSFileStatus obj will be type of HdfsLocatedFileStatus and trying cast. This is failing here. I think Suresh and Sanjay can give more hint on this. Regards, Uma ________________________________________ From: Eli Collins [e...@cloudera.com] Sent: Thursday, December 15, 2011 11:21 AM To: hdfs-dev@hadoop.apache.org Subject: test failures on trunk Hey gang, Looks like a number of the trunk tests (https://builds.apache.org/job/Hadoop-Hdfs-trunk) started failing on the 10th, due to the following. Ring a bell? Maybe due to all the recent protocol changes? Error Message org.apache.hadoop.hdfs.protocol.HdfsFileStatus cannot be cast to org.apache.hadoop.hdfs.protocol.HdfsLocatedFileStatus Stacktrace java.lang.ClassCastException: org.apache.hadoop.hdfs.protocol.HdfsFileStatus cannot be cast to org.apache.hadoop.hdfs.protocol.HdfsLocatedFileStatus at org.apache.hadoop.hdfs.DistributedFileSystem$1.hasNext(DistributedFileSystem.java:452) at org.apache.hadoop.fs.FileSystem$5.hasNext(FileSystem.java:1551) at org.apache.hadoop.fs.FileSystem$5.next(FileSystem.java:1581) at org.apache.hadoop.fs.FileSystem$5.next(FileSystem.java:1541) at org.apache.hadoop.fs.TestListFiles.testDirectory(TestListFiles.java:146) Thanks, Eli
