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https://issues.apache.org/jira/browse/HBASE-16402?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15418750#comment-15418750
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Hudson commented on HBASE-16402:
--------------------------------
FAILURE: Integrated in HBase-0.98-on-Hadoop-1.1 #1260 (See
[https://builds.apache.org/job/HBase-0.98-on-Hadoop-1.1/1260/])
HBASE-16402 RegionServerCoprocessorHost should be initialized before (apurtell:
rev 8168667f3aeb08bce70d9812bed40ecf9bd02bd1)
*
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
> 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
> Assignee: 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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