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farmmamba commented on HDFS-17467: ---------------------------------- [~hexiaoqiao] [~zhangshuyan] [~ayushsaxena] [~tomscut] Sir, could you please check this problem when you are free ? Thanks a lot. > IncrementalBlockReportManager#getPerStorageIBR may throw NPE when remove > volumes > -------------------------------------------------------------------------------- > > Key: HDFS-17467 > URL: https://issues.apache.org/jira/browse/HDFS-17467 > Project: Hadoop HDFS > Issue Type: Bug > Components: datanode > Affects Versions: 3.4.0 > Reporter: farmmamba > Assignee: farmmamba > Priority: Major > > When we remove volumes, it may cause > IncrementalBlockReportManager#getPerStorageIBR throws NPE. > Consider below situation: > 1、we have down createRbw、finalizeBlock. But have not done > datanode.closeBlock in method `BlockReceiver.PacketResponder#finalizeBlock`. > 2、we remove volume which replica was written to and it executes such code: > `storageMap.remove(storageUuid);` > 3、 we begin to execute datanode.closeBlock which try to send IBR to NameNode. > but when getting DatanodeStorage from storageMap using > storageUuid, we will get null because we have remove this storageUuid key > from storageMap. > 4、Throw NPE in getPerStorageIBR method, because ConcurrentHashMap don't allow > null key. > > > -- This message was sent by Atlassian Jira (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org