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https://issues.apache.org/jira/browse/HBASE-26533?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Duo Zhang reassigned HBASE-26533:
---------------------------------
Assignee: Raman Chodźka
> KeyValueScanner might not be properly closed when using
> InternalScan.checkOnlyMemStore()
> ----------------------------------------------------------------------------------------
>
> Key: HBASE-26533
> URL: https://issues.apache.org/jira/browse/HBASE-26533
> Project: HBase
> Issue Type: Bug
> Affects Versions: 2.3.6
> Reporter: Raman Chodźka
> Assignee: Raman Chodźka
> Priority: Minor
> Attachments: HBASE-26533.patch
>
>
> While writing a custom RegionObserver and using
> InternalScan.checkOnlyMemStore() I stumbled upon an issue. The number of
> files opened by region servers would grow steadily and eventually region
> servers would crash with
> {code:java}
> 2021-11-15 00:54:34,290 ERROR [MemStoreFlusher.1] regionserver.HStore: Failed
> to commit store file
> hdfs://<...removed...>:8020/hbase/data/default/<...removed...>/743071139057c819d7e6f7b59f065152/.tmp/f/394ba71102ec401d8779aa5f45819f84
> java.io.IOException: Failed on local exception: java.io.IOException: Too many
> open files; Host Details : local host is: "<...removed...>/<...removed...>";
> destination host is: "<...removed...>":8020;
> at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:805)
> at org.apache.hadoop.ipc.Client.getRpcResponse(Client.java:1544)
> at org.apache.hadoop.ipc.Client.call(Client.java:1486)
> at org.apache.hadoop.ipc.Client.call(Client.java:1385)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:232)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:118)
> at com.sun.proxy.$Proxy27.getFileInfo(Unknown Source)
> at
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileInfo(ClientNamenodeProtocolTranslatorPB.java:800)
> {code}
> Another symptom is the following messages in region server logs:
> {code:java}
> 2021-11-18 13:41:29,539 INFO
> [RS_COMPACTED_FILES_DISCHARGER-regionserver/<...removed...>:16020-7]
> regionserver.HStore: Can't archive compacted file
> hdfs://<...removed...>:8020/hbase/data/default/<...removed...>/ce6f08fdd82967df94d1c83e289d3142/f/9b01b8bdea324c22a92f1ba6b386e050.6261a24c6a689d5406ae1ea87dc9bb9f
> because of either isCompactedAway=true or file has reference,
> isReferencedInReads=true, refCount=7, skipping for now.
> {code}
> The culprit is KeyValueScanner not being closed in
> StoreScanner.selectScannersFrom() before `continue`
> [https://github.com/apache/hbase/blame/f000b775320330eb2f426f6b2a3b5e27a794a707/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java#L467]
>
>
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