[HBASE-17256] Rpc handler monitoring will be removed when the task queue is full

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.98.23, 1.2.4, 2.0.0
• Fix Version/s: 1.4.0, 0.98.24, 2.0.0
• Hadoop Flags: Reviewed
• Assignee: Guangxu Cheng
• Reporter: Guangxu Cheng
• Created: 05/Dec/16 08:24
• Updated: 28/Feb/17 05:44
• Resolved: 05/Dec/16 20:15

Description

The RPC handlers monitoring will displayed in the Web UI when the cluster has just started. As time goes on, RPC handlers disappeared .

We have the RPC handlers listed as tasks and stored in CircularFifoBuffer.
CircularFifoBuffer is a first in first out buffer with a fixed size that replaces its oldest element if full.
When we refresh the page, completed tasks will be removed from CircularFifoBuffer.
Not refresh the page for a long time, the oldest element (RPC handlers) will be replaced by new tasks.

Issue Links

• is related to: HBASE-17673 Monitored RPC Handler not shown in the WebUI