GuoPhilipse opened a new pull request #3649:
URL: https://github.com/apache/hadoop/pull/3649
we may suffer `Could not obtain the last block location` exception, but we
may reading more than one file, the following exception cannnot guide us to
find the problem block or dn info.
`2021-11-12 14:01:59,633 WARN [main] org.apache.hadoop.hdfs.DFSClient: Last
block locations not available. Datanodes might not have reported blocks
completely. Will retry for 3 times`
`2021-11-12 14:02:03,724 WARN [main] org.apache.hadoop.hdfs.DFSClient: Last
block locations not available. Datanodes might not have reported blocks
completely. Will retry for 2 times`
`2021-11-12 14:02:07,726 WARN [main] org.apache.hadoop.hdfs.DFSClient: Last
block locations not available. Datanodes might not have reported blocks
completely. Will retry for 1 times`
`Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedConstructorAccessor19.newInstance(Unknown
Source)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at
org.apache.hadoop.hive.shims.HadoopShimsSecure$CombineFileRecordReader.initNextRecordReader(HadoopShimsSecure.java:251)
... 11 more`
`Caused by: java.io.IOException: Could not obtain the last block locations.
at
org.apache.hadoop.hdfs.DFSInputStream.openInfo(DFSInputStream.java:291)
at org.apache.hadoop.hdfs.DFSInputStream.(DFSInputStream.java:264)
at org.apache.hadoop.hdfs.DFSClient.open(DFSClient.java:1535)
at
org.apache.hadoop.hdfs.DistributedFileSystem$3.doCall(DistributedFileSystem.java:304)
at
org.apache.hadoop.hdfs.DistributedFileSystem$3.doCall(DistributedFileSystem.java:299)
at
org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
at
org.apache.hadoop.hdfs.DistributedFileSystem.open(DistributedFileSystem.java:312)
at org.apache.hadoop.fs.FilterFileSystem.open(FilterFileSystem.java:162)
at
org.apache.hadoop.fs.viewfs.ChRootedFileSystem.open(ChRootedFileSystem.java:261)
at
org.apache.hadoop.fs.viewfs.ViewFileSystem.open(ViewFileSystem.java:463)
at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:768)
at org.apache.hadoop.mapred.LineRecordReader.(LineRecordReader.java:109)
at
org.apache.hadoop.mapred.TextInputFormat.getRecordReader(TextInputFormat.java:67)
at
org.apache.hadoop.hive.ql.io.CombineHiveRecordReader.(CombineHiveRecordReader.java:66)
... 15 more`
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