[ORC-369] Seek to end of BitFieldReader causes EOFException

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Unassigned
• Reporter: Dain Sundstrom
• Created: 30/May/18 02:02
• Updated: 30/May/18 02:08

Description

If a boolean stream ends with "all nulls", a seek to right after the null start will cause an `EOFException`.

The root cause is very simple https://github.com/apache/orc/blob/master/java/core/src/java/org/apache/orc/impl/BitFieldReader.java#L98

The seek forward in the input stream consumes all of the bytes, and then the next line attempts to "load" a new value into the reader. Instead when the skip is aligned to the byte end, the load should be delayed until the next read call.