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Gregory Chanan commented on HBASE-7386: --------------------------------------- Thanks for the feedback, I agree with what both of you are saying. I'm working on an a start-hbase like script. bq. What to do for the case where a shop has chosen other than supervisord to monitor their processes? I suppose we could let them do the convertion from 'supervise' to 'god', etc.? I don't think we should worry about it for the first pass. I figure if a shop is familiar with a different tool they should be able to write their own scripts/configs with the supervisord ones we provide as a guide. > Investigate providing some supervisor support for znode deletion > ---------------------------------------------------------------- > > Key: HBASE-7386 > URL: https://issues.apache.org/jira/browse/HBASE-7386 > Project: HBase > Issue Type: Task > Components: master, regionserver, scripts > Reporter: Gregory Chanan > Assignee: Gregory Chanan > Fix For: 0.96.0 > > Attachments: HBASE-7386-v0.patch, supervisordconfigs-v0.patch > > > There a couple of JIRAs for deleting the znode on a process failure: > HBASE-5844 (RS) > HBASE-5926 (Master) > which are pretty neat; on process failure, they delete the znode of the > underlying process so HBase can recover faster. > These JIRAs were implemented via the startup scripts; i.e. the script hangs > around and waits for the process to exit, then deletes the znode. > There are a few problems associated with this approach, as listed in the > below JIRAs: > 1) Hides startup output in script > https://issues.apache.org/jira/browse/HBASE-5844?focusedCommentId=13463401&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13463401 > 2) two hbase processes listed per launched daemon > https://issues.apache.org/jira/browse/HBASE-5844?focusedCommentId=13463409&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13463409 > 3) Not run by a real supervisor > https://issues.apache.org/jira/browse/HBASE-5844?focusedCommentId=13463409&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13463409 > 4) Weird output after kill -9 actual process in standalone mode > https://issues.apache.org/jira/browse/HBASE-5926?focusedCommentId=13506801&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13506801 > 5) Can kill existing RS if called again > https://issues.apache.org/jira/browse/HBASE-5844?focusedCommentId=13463401&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13463401 > 6) Hides stdout/stderr[6] > https://issues.apache.org/jira/browse/HBASE-5844?focusedCommentId=13506832&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13506832 > I suspect running in via something like supervisor.d can solve these issues > if we provide the right support. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira