lujie created HBASE-22050:
-----------------------------
Summary: NPE happens while RS shutdown, due to atomic violation
Key: HBASE-22050
URL: https://issues.apache.org/jira/browse/HBASE-22050
Project: HBase
Issue Type: Bug
Reporter: lujie
while RS shutdown, the RS#abort are called due to
{code:java}
handler.AssignRegionHandler: Fatal error occured while opening region
hbase:meta,,1.1588230740, aborting...
{code}
And in abort:
{code:java}
2428.if (rssStub != null && this.serverName != null) {
2429 ReportRSFatalErrorRequest.Builder builder =
2430. ReportRSFatalErrorRequest.newBuilder();
2431. builder.setServer(ProtobufUtil.toServerName(this.serverName));
2432 builder.setErrorMessage(msg);
2433 rssStub.reportRSFatalError(null, builder.build());
2434 }
{code}
2428-2434 are assumed to be atomic, but if it step in the 2429-2433, meanwhile
RS#run:
{code:java}
1149 // Make sure the proxy is down.
1150 if (this.rssStub != null) {
1151 this.rssStub = null;
1152 }
{code}
So the rssStub == null and NPE happens
{code:java}
2019-03-14 04:49:53,016 WARN [RS_CLOSE_META-regionserver/hadoop12:16020-0]
regionserver.HRegionServer: Unable to report fatal error to master
java.lang.NullPointerException
at
org.apache.hadoop.hbase.regionserver.HRegionServer.abort(HRegionServer.java:2433)
at
org.apache.hadoop.hbase.regionserver.handler.AssignRegionHandler.handleException(AssignRegionHandler.java:154)
at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:106)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
{code}
I think we should avoid the NPE.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
