[TAJO-2001] DirectRawFileScanner.getProgress occasionally fails

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.11.1
• Fix Version/s: 0.12.0, 0.11.1
• Component/s: Storage
• Assignee: Jinho Kim
• Reporter: Jinho Kim
• Created: 02/Dec/15 08:16
• Updated: 03/Dec/15 06:28
• Resolved: 03/Dec/15 05:42

Description

if getProgress is called after scanner is closed, ClosedChannelException can cause

Here is the log

2015-11-30 17:15:09,131 ERROR org.apache.tajo.storage.rawfile.DirectRawFileScanner:
java.nio.channels.ClosedChannelException
        at sun.nio.ch.FileChannelImpl.ensureOpen(FileChannelImpl.java:109)
        at sun.nio.ch.FileChannelImpl.position(FileChannelImpl.java:252)
        at org.apache.tajo.storage.LocalFileInputChannel.position(LocalFileInputChannel.java:54)
        at org.apache.tajo.storage.rawfile.DirectRawFileScanner.getProgress(DirectRawFileScanner.java:221)
        at org.apache.tajo.engine.planner.physical.ExternalSortExec$PairWiseMerger.getProgress(ExternalSortExec.java:768)
        at org.apache.tajo.engine.planner.physical.ExternalSortExec$PairWiseMerger.getProgress(ExternalSortExec.java:768)
        at org.apache.tajo.engine.planner.physical.ExternalSortExec$PairWiseMerger.getProgress(ExternalSortExec.java:768)
        at org.apache.tajo.engine.planner.physical.ExternalSortExec.getProgress(ExternalSortExec.java:849)
        at org.apache.tajo.engine.planner.physical.UnaryPhysicalExec.getProgress(UnaryPhysicalExec.java:87)
        at org.apache.tajo.worker.TaskImpl.updateProgress(TaskImpl.java:315)
        at org.apache.tajo.worker.ExecutionBlockContext$Reporter$1.run(ExecutionBlockContext.java:407)
        at java.lang.Thread.run(Thread.java:745)
2015-11-30 17:15:09,131 ERROR org.apache.tajo.storage.rawfile.DirectRawFileScanner:
java.nio.channels.ClosedChannelException