[HDFS-12953] XORRawDecoder.doDecode throws NullPointerException

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.0.0
• Component/s: erasure-coding
• Target Version/s: 3.5.0
• Assignee: Aihua Xu
• Reporter: Lei (Eddy) Xu
• Created: 21/Dec/17 00:44
• Updated: 04/Jan/24 07:58

Description

Thanks danielpol report on HDFS-12860.

17/11/30 04:19:55 INFO mapreduce.Job: map 0% reduce 0%
17/11/30 04:20:01 INFO mapreduce.Job: Task Id : attempt_1512036058655_0003_m_000002_0, Status : FAILED
Error: java.lang.NullPointerException
at org.apache.hadoop.io.erasurecode.rawcoder.XORRawDecoder.doDecode(XORRawDecoder.java:83)
at org.apache.hadoop.io.erasurecode.rawcoder.RawErasureDecoder.decode(RawErasureDecoder.java:106)
at org.apache.hadoop.io.erasurecode.rawcoder.RawErasureDecoder.decode(RawErasureDecoder.java:170)
at org.apache.hadoop.hdfs.StripeReader.decodeAndFillBuffer(StripeReader.java:423)
at org.apache.hadoop.hdfs.StatefulStripeReader.decode(StatefulStripeReader.java:94)
at org.apache.hadoop.hdfs.StripeReader.readStripe(StripeReader.java:382)
at org.apache.hadoop.hdfs.DFSStripedInputStream.readOneStripe(DFSStripedInputStream.java:318)
at org.apache.hadoop.hdfs.DFSStripedInputStream.readWithStrategy(DFSStripedInputStream.java:391)
at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:813)
at java.io.DataInputStream.read(DataInputStream.java:149)
at org.apache.hadoop.examples.terasort.TeraInputFormat$TeraRecordReader.nextKeyValue(TeraInputFormat.java:257)
at org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.nextKeyValue(MapTask.java:563)
at org.apache.hadoop.mapreduce.task.MapContextImpl.nextKeyValue(MapContextImpl.java:80)
at org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.nextKeyValue(WrappedMapper.java:91)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:794)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:342)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:174)
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.mapred.YarnChild.main(YarnChild.java:168)