[HBASE-5900] HRegion#FIXED_OVERHEAD is miscalculated in 94.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.94.0
• Fix Version/s: 0.94.0
• Component/s: regionserver
• Assignee: Jieshan Bean
• Reporter: Jieshan Bean
• Created: 30/Apr/12 06:50
• Updated: 12/Oct/12 05:35
• Resolved: 02/May/12 03:22

Description

After apply the patch of HBASE-5611, and tested on a 32-bit machine. This problem was triggered.
Before this patch, TestHeapSize is passed by pure coincidence in 94.

  public static final long FIXED_OVERHEAD = ClassSize.align(
      ClassSize.OBJECT +
      ClassSize.ARRAY +
      30  * ClassSize.REFERENCE + Bytes.SIZEOF_INT +
      (6 * Bytes.SIZEOF_LONG) +
      Bytes.SIZEOF_BOOLEAN);

Actually, there are 31 REFERENCEs and 5 LONGs in HRegion.