Bug 727245
| Summary: | RHQ Agent leaks java classes when issued command "plugins update" | ||||||
|---|---|---|---|---|---|---|---|
| Product: | [Other] RHQ Project | Reporter: | Mike Foley <mfoley> | ||||
| Component: | Agent | Assignee: | John Mazzitelli <mazz> | ||||
| Status: | NEW --- | QA Contact: | |||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | medium | ||||||
| Version: | 4.1 | CC: | hrupp | ||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | All | ||||||
| OS: | All | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | Type: | --- | |||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Bug Depends On: | |||||||
| Bug Blocks: | 625146 | ||||||
| Attachments: |
|
||||||
also ... tested: ping .... minor leak (but may be important if this command is issued automatically frequently) discovery -f ... minor leak metrics ... OK avail ... OK Assigning to mazz for comment IIRC this was to do with the plugin container getting reloaded, and is a known issue, with no reasonable fix. Work around would be restarting the agent after a certain number of plugin updates (which in production systems are typically only done during patching or upgrades) related to bug 615377 see its tenth comment https://bugzilla.redhat.com/show_bug.cgi?id=615377#c10 "There still seems to be some minor perm gen leakage that occurs when restarting the internals (using either "shutdown/start", "plugins update" or "pc stop/pc start" - which all restart the PC" Setting to medium priority as per mazz's comment |
Created attachment 516174 [details] Image showing the java classes that are leaking Description of problem: RHQ Agent leaks java classes when issued command "plugins update". Unbounded increase in class instance counts when this command is issued on the agent, even when there are no updates to the plugin needed. Unbounded growth of java programs leads to exhaustion of system resources and robustness/duration/longevity issues. Version-Release number of selected component (if applicable): How reproducible: 100% Steps to Reproduce: 1. Attach Jprofiler to the agent 2. on the agent, do "plugins update" 3. in jprofiler, do GC 4. in jprofiler, set a baseline 5. on agent, do "plugins update" 6. in jprofiler, do GC 7. in jprofiler, observe instance counts on java classes increased 8. do another "plugins update" ... followed by a GC 9. observe unbounded growth of java class instance counts Actual results: Expected results: Additional info: