Bug 1130392
| Summary: | Sigar cannot detect kernel thread names, e.g. nfsd4; cannot easily monitor these | ||
|---|---|---|---|
| Product: | [Other] RHQ Project | Reporter: | Elias Ross <genman> |
| Component: | Agent | Assignee: | Thomas Segismont <tsegismo> |
| Status: | ON_QA --- | QA Contact: | |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 4.9 | CC: | hrupp, tsegismo |
| Target Milestone: | --- | ||
| Target Release: | RHQ 4.13 | ||
| Hardware: | Unspecified | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | Bug | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Fixed in master, thanks Elias. Branch: refs/heads/master Home: https://github.com/rhq-project/rhq Commit: 90dfaa9df9ee7eaa2fa5300d7b6b8cdf98c42919 https://github.com/rhq-project/rhq/commit/90dfaa9df9ee7eaa2fa5300d7b6b8cdf98c42919 Author: Elias Ross <elias_ross> Date: 2014-10-15 (Wed, 15 Oct 2014) Changed paths: M modules/core/native-system/src/main/java/org/rhq/core/system/ProcessInfo.java Log Message: ----------- Bug 1130392 - Sigar cannot detect kernel thread names Sigar does detect the name of kernel threads, it's RHQ that has been filtering them out. The fix is simply removing the check for filename existence, and kernel thread names don't have files anyway. Commit: 9fa2131e6a622c988c0283a3626e5e5d39d8f176 https://github.com/rhq-project/rhq/commit/9fa2131e6a622c988c0283a3626e5e5d39d8f176 Author: Thomas Segismont <tsegismont> Date: 2014-11-20 (Thu, 20 Nov 2014) Changed paths: M modules/core/native-system/src/main/java/org/rhq/core/system/ProcessInfo.java Log Message: ----------- Merge pull request #139 from genman/bug/1130392 Bug 1130392 - Sigar cannot detect kernel thread names Compare: https://github.com/rhq-project/rhq/compare/72446e2a2b39...9fa2131e6a62 |
Description of problem: Sigar can't grok the name of kernel threads. They appear like so in ps: $ ps aux | grep 6073 root 6073 0.0 0.0 0 0 ? S< Aug12 0:00 [nfsd4] This making it hard to monitor these. This seems to be a problem with Sigar itself not finding the data. The data is available from the /proc directory on Linux. $ cat /proc/6073/status | grep Name Name: nfsd4 The test program shows this: $ sudo java -cp /usr/local/rhq-agent/lib/sigar-1.6.5.132-5.jar:. Test 6073 exe org.hyperic.sigar.SigarFileNotFoundException: No such file or directory [] [{}] Program: import org.hyperic.sigar.*; import java.util.*; public class Test { public static void main(String args[]) throws Exception { long pid = new Long(args[0]); Sigar s = new Sigar(); try { System.out.println(s.getProcExe(pid)); } catch (Exception e) { System.out.println("exe " + e); } try { System.out.println(Arrays.asList(s.getProcArgs(pid))); } catch (Exception e) {} try { System.out.println(Arrays.asList(s.getProcEnv(pid))); } catch (Exception e) {} } } ... The solution is probably to patch Sigar, not sure on the procedure here.