Andrew Purtell created HBASE-16402:
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Summary: 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: Andrew Purtell
Fix For: 0.98.22
>From [~zghaobac] on HBASE-10338
{quote}
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.
{quote}
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