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Jing Zhao commented on HDFS-7611: --------------------------------- Sure, I will also do some further digging tomorrow. > deleteSnapshot and delete of a file can leave orphaned blocks in the > blocksMap on NameNode restart. > --------------------------------------------------------------------------------------------------- > > Key: HDFS-7611 > URL: https://issues.apache.org/jira/browse/HDFS-7611 > Project: Hadoop HDFS > Issue Type: Bug > Components: namenode > Affects Versions: 2.6.0 > Reporter: Konstantin Shvachko > Assignee: Byron Wong > Priority: Critical > Attachments: HDFS-7611.000.patch, HDFS-7611.001.patch, > HDFS-7611.002.patch, blocksNotDeletedTest.patch, testTruncateEditLogLoad.log > > > If quotas are enabled a combination of operations *deleteSnapshot* and > *delete* of a file can leave orphaned blocks in the blocksMap on NameNode > restart. They are counted as missing on the NameNode, and can prevent > NameNode from coming out of safeMode and could cause memory leak during > startup. -- This message was sent by Atlassian JIRA (v6.3.4#6332)