[TRAFODION-3126] Refactored HDFS client implementation should also support Alluxio file system

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: sql-exe
• Assignee: Selvaganesan Govindarajan
• Reporter: Selvaganesan Govindarajan
• Created: 29/Jun/18 21:11
• Updated: 03/Jul/18 02:59

Description

New implementation returns the following error when Alluxio file system is involved.

• • • ERROR[8447] An error occurred during hdfs access. Error Detail: SETUP_HDFS_SCAN java.util.concurrent.ExecutionException: java.lang.UnsupportedOperationException: Byte-buffer read unsupported by input stream

java.util.concurrent.FutureTask.report(FutureTask.java:122)

java.util.concurrent.FutureTask.get(FutureTask.java:192)

org.trafodion.sql.HDFSClient.trafHdfsReadBuffer(HDFSClient.java:278)

org.trafodion.sql.HdfsScan.trafHdfsRead(HdfsScan.java:201) Caused by

java.lang.UnsupportedOperationException: Byte-buffer read unsupported by input stream

org.apache.hadoop.fs.FSDataInputStream.read(FSDataInputStream.java:150)

org.trafodion.sql.HDFSClient$HDFSRead.call(HDFSClient.java:172)

java.util.concurrent.FutureTask.run(FutureTask.java:266)

java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

java.lang.Thread.run(Thread.java:745)

Issue Links

• links to: GitHub Pull Request #1626