[jira] [Resolved] (HBASE-30099) HRegionServer.getBootstrapNodes() NPE when GetBootstrapNodes RPC arrives during startup

["Peter Somogyi (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-30099?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Peter Somogyi resolved HBASE-30099.
-----------------------------------
    Fix Version/s: 4.0.0-alpha-1
                   2.7.0
                   3.1.0
                   3.0.1
                   2.6.8
       Resolution: Fixed

Thanks for the fix, [~mazhengxuan]. I pushed the commits to branch-2.6+.

> HRegionServer.getBootstrapNodes() NPE when GetBootstrapNodes RPC arrives during startup
> ---------------------------------------------------------------------------------------
>
>                 Key: HBASE-30099
>                 URL: https://issues.apache.org/jira/browse/HBASE-30099
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 3.0.0-beta-1, 2.6.5, 2.5.14
>            Reporter: Nick Dimiduk
>            Assignee: mazhengxuan
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.0.0-alpha-1, 2.7.0, 3.1.0, 3.0.1, 2.6.8
>
>
> {{HRegionServer.getBootstrapNodes()}} throws {{NullPointerException: Cannot invoke "BootstrapNodeManager.getBootstrapNodes()" because "this.bootstrapNodeManager" is null}} when the {{GetBootstrapNodes}} RPC arrives after the RPC server starts accepting connections but before {{preRegistrationInitialization()}} has assigned the field. Once tripped, every subsequent {{GetBootstrapNodes}} RPC on that instance returns the same NPE to the caller.
> Observed in production on a branch-2.6 cluster during a period of fleet-wide RS restarts, when peer RegionServers all issued bootstrap-node discovery against each fresh RS during its startup window. Same class of startup race as HBASE-28088.



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