[KNOX-989] Revisit JMX Metrics to fix the Out of Memory issue

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.14.0
• Component/s: Server
• Flags: Patch
• Assignee: Mohammad Islam
• Reporter: Sandeep More
• Created: 02/Aug/17 15:37
• Updated: 28/Mar/19 14:07
• Resolved: 25/Aug/17 16:12

Description

Bug KNOX-986 uncovers problem with Metrics when large number of unique URLs are accessed via Knox. The problem here is that Knox creates metrics objects per unique URL, the metrics objects are not flushed out (for obvious reason - to maintain the metric state).

We need to come up with a proper fix to mitigate this while being able to use the JMX Metrics.
One way of doing this would be to have Metrics objects at service level ( e.g. /gateway/sandbox/webhdfs/* ) the other way would be to have a reaper process that clears out the unused objects. Other suggestions are welcomed !

Issue Links

• is related to: KNOX-986 JMX Metric Reporter and OutOfMemory Issues