[HDFS-10271] Extra bytes are getting released from reservedSpace for append

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 2.8.0, 2.7.3, 2.6.5, 3.0.0-alpha1
• Target Version/s: 2.7.3, 2.6.5
• Hadoop Flags: Reviewed
• Assignee: Brahma Reddy Battula
• Reporter: Brahma Reddy Battula
• Created: 08/Apr/16 07:30
• Updated: 06/Jan/17 00:47
• Resolved: 12/Apr/16 06:23

Description

1. File already have some bytes available in block. (ex: 1024B)
2. Re-open the file for append, (Here reserving for (BlockSize-1024) bytes)
3. write one byte and flush,
4. close()

After close(), releasing BlockSize-1 bytes from reservedspace instead of BlockSize-1025 bytes.
Extra bytes released from reservedSpace may create problem for other writers.

Issue Links

• relates to: HDFS-9530 ReservedSpace is not cleared for abandoned Blocks