[jira] [Created] (HDFS-13412) filesystem will throw out-of-bounds access for webhdfs using DirectoryListing

["Shen, Neal (JIRA)" <ji...@apache.org>]

Shen, Neal created HDFS-13412:
---------------------------------

             Summary: filesystem will throw out-of-bounds access for webhdfs using DirectoryListing
                 Key: HDFS-13412
                 URL: https://issues.apache.org/jira/browse/HDFS-13412
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: webhdfs
    Affects Versions: 3.0.0
            Reporter: Shen, Neal
             Fix For: 3.0.0


In a big directory, there are a lot of entries; so we use LISTSTATUS_BATCH over webhdfs;

and if the first batch is returned and preparing to query with startAfter but the left entries are deleted from the directory.

for this scenario,the hadoop client will throw out-of-bounds access at line 'return (T)entries.getEntries()[i++];'

@Override
 @SuppressWarnings("unchecked")
 public T next() throws IOException {
 Preconditions.checkState(hasNext(), "No more items in iterator");
 if (i == entries.getEntries().length) {
 fetchMore();
 }
 return (T)entries.getEntries()[i++];
 }

here is the exception stack:

 

java.lang.ArrayIndexOutOfBoundsException: 0
 at org.apache.hadoop.fs.FileSystem$DirListingIterator.next(FileSystem.java:2120)
 at org.apache.hadoop.fs.FileSystem$DirListingIterator.next(FileSystem.java:2084)
 at org.apache.hadoop.hdfs.web.TestWebHdfsListBatch$1.run(TestWebHdfsListBatch.java:149)
 at org.apache.hadoop.hdfs.web.TestWebHdfsListBatch$1.run(TestWebHdfsListBatch.java:135)
 at java.security.AccessController.doPrivileged(Native Method)
 at javax.security.auth.Subject.doAs(Subject.java:422)
 at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1962)
 at org.apache.hadoop.hdfs.web.TestWebHdfsListBatch.testLargeDirectory(TestWebHdfsListBatch.java:135)
 at org.apache.hadoop.hdfs.web.TestWebHdfsListBatch.main(TestWebHdfsListBatch.java:102)
2018-03-30 22:53:00,731 DEBUG util.ShutdownHookManager: ShutdownHookManger complete shutdown.

 

 

 

 



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