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Posted to issues@hbase.apache.org by "Matteo Bertozzi (JIRA)" <ji...@apache.org> on 2016/08/12 00:51:20 UTC
[jira] [Commented] (HBASE-16402) RegionServerCoprocessorHost should
be initialized before RpcServer starts
[ https://issues.apache.org/jira/browse/HBASE-16402?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15418191#comment-15418191 ]
Matteo Bertozzi commented on HBASE-16402:
-----------------------------------------
+1
> RegionServerCoprocessorHost should be initialized before RpcServer starts
> -------------------------------------------------------------------------
>
> Key: HBASE-16402
> URL: https://issues.apache.org/jira/browse/HBASE-16402
> Project: HBase
> Issue Type: Bug
> Reporter: Guanghao Zhang
> Fix For: 0.98.22
>
> Attachments: HBASE-16402-0.98.patch
>
>
> We found NPE in our 0.98 production cluster because RegionServerCoprocessorHost is not initialized before RpcServer start service.
> {code}
> // Try and register with the Master; tell it we are here. Break if
> // server is stopped or the clusterup flag is down or hdfs went wacky.
> while (keepLooping()) {
> RegionServerStartupResponse w = reportForDuty();
> if (w == null) {
> LOG.warn("reportForDuty failed; sleeping and then retrying.");
> this.sleeper.sleep();
> } else {
> handleReportForDutyResponse(w);
> break;
> }
> }
> // Initialize the RegionServerCoprocessorHost now that our ephemeral
> // node was created by reportForDuty, in case any coprocessors want
> // to use ZooKeeper
> this.rsHost = new RegionServerCoprocessorHost(this, this.conf);
> {code}
> RpcServer start service in handleReportForDutyResponse(), then it can serve rpc call replicateWALEntry(). But the RegionServerCoprocessorHost is not initialized and it is used in replicateWALEntry, so it will throw a NPE.
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