[ https://issues.apache.org/jira/browse/HDFS-6047?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
stack updated HDFS-6047: ------------------------ Attachment: HDFS-6047.txt Check for null chosenNode before adding it to list of nodes to ignore. > TestPread NPE inside in DFSInputStream hedgedFetchBlockByteRange > ---------------------------------------------------------------- > > Key: HDFS-6047 > URL: https://issues.apache.org/jira/browse/HDFS-6047 > Project: Hadoop HDFS > Issue Type: Bug > Affects Versions: 2.4.0 > Reporter: stack > Assignee: stack > Fix For: 2.4.0 > > Attachments: HDFS-6047.txt > > > Our [~andrew.wang] saw this on internal test cluster running trunk: > {code} > java.lang.NullPointerException: null > at > org.apache.hadoop.hdfs.DFSInputStream.hedgedFetchBlockByteRange(DFSInputStream.java:1181) > at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:1296) > at org.apache.hadoop.fs.FSInputStream.readFully(FSInputStream.java:78) > at > org.apache.hadoop.fs.FSDataInputStream.readFully(FSDataInputStream.java:108) > at org.apache.hadoop.hdfs.TestPread.pReadFile(TestPread.java:151) > at > org.apache.hadoop.hdfs.TestPread.testMaxOutHedgedReadPool(TestPread.java:292) > {code} > TestPread was failing. > The NPE comes of our presuming there always a chosenNode as we set up hedged > reads inside in hedgedFetchBlockByteRange (chosenNode is null'd each time > through the loop). Usually there is a chosenNode but need to allow for case > where there is not. -- This message was sent by Atlassian JIRA (v6.2#6252)