[HADOOP-9401] CodecPool: Add counters for number of (de)compressors leased out

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.3-alpha
• Fix Version/s: 2.1.0-beta
• Target Version/s: 2.1.0-beta
• Hadoop Flags: Reviewed
• Assignee: Karthik Kambatla
• Reporter: Karthik Kambatla
• Created: 13/Mar/13 00:54
• Updated: 03/Nov/14 18:34
• Resolved: 03/Apr/13 22:27

Description

CodecPool enables reusing compressors/decompressors created. However, the onus is on the user to return the compressors/decompressors to the pool, and can be easily missed.

It would be quite handy to keep track of the total number of compressors/decompressors created and helper methods to check outstanding (not returned) compressors/decompressors. It immediately allows Hadoop and downstream projects to write unit tests for the same.