[ https://issues.apache.org/jira/browse/HBASE-7386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16106090#comment-16106090 ]
Samir Ahmic commented on HBASE-7386: ------------------------------------ [~stack] did you maybe have chance to take scripts on test drive ? Any suggestions how we can improve this chief ? > 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: stack > Priority: Blocker > Fix For: 3.0.0 > > Attachments: HBASE-7386-bin.patch, HBASE-7386-bin-v2.patch, > HBASE-7386-bin-v3.patch, HBASE-7386-conf.patch, HBASE-7386-conf-v2.patch, > HBASE-7386-conf-v3.patch, HBASE-7386-master-00.patch, > HBASE-7386-master-01.patch, HBASE-7386-src.patch, 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 was sent by Atlassian JIRA (v6.4.14#64029)