[CHUKWA-330] controller should not create duplicates for adaptors with offsets

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 0.2.0, 0.3.0
• Component/s: Input Tools
• Hadoop Flags: Incompatible change, Reviewed

Release Note

For 0.2:

Modified AgentController to add adaptor by name for uniquely identify stream.

For 0.3:

Make separation between fixed adaptor parameters and optional adaptor parameters for generating adaptor id.

• Assignee: Ari Rabkin
• Reporter: Ari Rabkin
• Created: 23/Jun/09 23:37
• Updated: 25/Jun/09 17:03
• Resolved: 25/Jun/09 17:03

Description

The offset-of-first-byte param to FileTailingAdaptor is hashed into the default adaptor name. This changes the semantics of adaptor uniqueness, and broke metrics and the log4jappender.

Proposed fix:
Add a new "addByName()" method to ChukwaAgentController that lets callers specify names.
Use this new method whenever finer control of adaptor uniqueness is needed.

Issue Links

• is part of: CHUKWA-290 ChukwaAgentController could be a lot simpler