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Posted to issues@hbase.apache.org by "Ted Yu (JIRA)" <ji...@apache.org> on 2015/11/27 16:46:10 UTC
[jira] [Updated] (HBASE-14893) Race between mutation on region and
region closing operation leads to NotServingRegionException
[ https://issues.apache.org/jira/browse/HBASE-14893?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ted Yu updated HBASE-14893:
---------------------------
Attachment: 14893-v1.txt
> Race between mutation on region and region closing operation leads to NotServingRegionException
> -----------------------------------------------------------------------------------------------
>
> Key: HBASE-14893
> URL: https://issues.apache.org/jira/browse/HBASE-14893
> Project: HBase
> Issue Type: Bug
> Reporter: Ted Yu
> Assignee: Ted Yu
> Attachments: 14893-v1.txt
>
>
> During system test involving Phoenix local index, we observed the following in region server log:
> {code}
> 2015-11-25 08:20:03,258 DEBUG [B.defaultRpcServer.handler=38,queue=2,port=49524] ipc.RpcServer: B.defaultRpcServer.handler=38,queue=2,port=49524: callId: 28 service: ClientService methodName: Scan size: 277 connection: 100.75.224.9:64138^M
> org.apache.hadoop.hbase.NotServingRegionException: GIGANTIC_TABLE,,1448439565197.0dc568cba621f11fd848ef87241d8535. is closing^M
> at org.apache.hadoop.hbase.regionserver.HRegion.startRegionOperation(HRegion.java:7649)^M
> at org.apache.hadoop.hbase.regionserver.HRegion.batchMutate(HRegion.java:2803)^M
> at org.apache.hadoop.hbase.regionserver.HRegion.batchMutate(HRegion.java:2760)^M
> at org.apache.phoenix.coprocessor.UngroupedAggregateRegionObserver.commitBatch(UngroupedAggregateRegionObserver.java:140)^M
> at org.apache.phoenix.coprocessor.UngroupedAggregateRegionObserver.doPostScannerOpen(UngroupedAggregateRegionObserver.java:417)^M
> at org.apache.phoenix.coprocessor.BaseScannerRegionObserver.postScannerOpen(BaseScannerRegionObserver.java:177)^M
> at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost$52.call(RegionCoprocessorHost.java:1318)^M
> at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost$RegionOperation.call(RegionCoprocessorHost.java:1673)^M
> at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.execOperation(RegionCoprocessorHost.java:1748)^M
> at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.execOperationWithResult(RegionCoprocessorHost.java:1712)^M
> at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.postScannerOpen(RegionCoprocessorHost.java:1313)^M
> at org.apache.hadoop.hbase.regionserver.RSRpcServices.scan(RSRpcServices.java:2259)^M
> at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:32205)^M
> at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2114)^M
> {code}
> Here is related code snippet from UngroupedAggregateRegionObserver:
> {code}
> region.startRegionOperation();
> try {
> ...
> // Commit in batches based on UPSERT_BATCH_SIZE_ATTRIB in config
> if (!indexMutations.isEmpty() && batchSize > 0 &&
> indexMutations.size() % batchSize == 0) {
> commitBatch(region, indexMutations, null);
> {code}
> In startRegionOperation(), read lock on region was obtained. So region close should not proceed until the operation completes.
> However, we still got region closing because region#closing is set to true before write lock is taken in region#doClose() :
> {code}
> this.closing.set(true);
> status.setStatus("Disabling writes for close");
> // block waiting for the lock for closing
> lock.writeLock().lock();
> {code}
> Proposed fix is to obtain write lock first.
> Thanks to Rajeshbabu for offline discussion.
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