Konstantin Shvachko created HDFS-10301: ------------------------------------------
Summary: Blocks removed by thousands due to falsely detected zombie storages Key: HDFS-10301 URL: https://issues.apache.org/jira/browse/HDFS-10301 Project: Hadoop HDFS Issue Type: Bug Components: namenode Affects Versions: 2.6.1 Reporter: Konstantin Shvachko Priority: Critical When NameNode is busy a DataNode can timeout sending a block report. Then it sends the block report again. Then NameNode while process these two reports at the same time can interleave processing storages from different reports. This screws up the blockReportId field, which makes NameNode think that some storages are zombie. Replicas from zombie storages are immediately removed, causing missing blocks. -- This message was sent by Atlassian JIRA (v6.3.4#6332)